./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc --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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- 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-5e519f3 [2022-11-02 20:49:19,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:19,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:19,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:19,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:19,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:19,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:19,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:19,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:19,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:19,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:19,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:19,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:19,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:19,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:19,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:19,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:19,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:19,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:19,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:19,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:19,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:19,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:19,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:19,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:19,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:19,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:19,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:19,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:19,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:19,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:19,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:19,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:19,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:19,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:19,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:19,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:19,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:19,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:19,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:19,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:19,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:49:19,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:19,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:19,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:19,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:19,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:19,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:19,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:19,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:19,748 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:19,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:19,750 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:49:19,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:19,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:49:19,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:19,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:19,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:19,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:19,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:49:19,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:19,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:19,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:19,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:19,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:19,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:19,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:19,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:19,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:19,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:19,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:19,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:19,757 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:19,757 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:19,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:19,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2022-11-02 20:49:20,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:20,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:20,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:20,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:20,118 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:20,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-11-02 20:49:20,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/data/d3b97d753/9724f36bf40945c2b688511ac3de4031/FLAG17ebf2a92 [2022-11-02 20:49:20,724 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:20,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-11-02 20:49:20,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/data/d3b97d753/9724f36bf40945c2b688511ac3de4031/FLAG17ebf2a92 [2022-11-02 20:49:21,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/data/d3b97d753/9724f36bf40945c2b688511ac3de4031 [2022-11-02 20:49:21,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:21,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:21,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:21,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:21,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:21,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3df675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21, skipping insertion in model container [2022-11-02 20:49:21,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:21,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:21,562 WARN L230 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_8f46707b-d7c4-42d2-8c20-0aa2f331d717/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2022-11-02 20:49:21,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:21,599 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:21,647 WARN L230 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_8f46707b-d7c4-42d2-8c20-0aa2f331d717/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2022-11-02 20:49:21,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:21,717 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:21,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21 WrapperNode [2022-11-02 20:49:21,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:21,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:21,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:21,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:21,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,786 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-02 20:49:21,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:21,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:21,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:21,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:21,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,831 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:21,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:21,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:21,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:21,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (1/1) ... [2022-11-02 20:49:21,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:21,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:21,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:21,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:49:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:49:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:49:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:49:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:49:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-02 20:49:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-02 20:49:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:49:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:49:21,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:21,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:21,942 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:49:22,062 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:22,065 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:22,256 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:22,264 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:22,264 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-02 20:49:22,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:22 BoogieIcfgContainer [2022-11-02 20:49:22,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:22,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:22,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:22,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:22,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:21" (1/3) ... [2022-11-02 20:49:22,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0d5d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:22, skipping insertion in model container [2022-11-02 20:49:22,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:21" (2/3) ... [2022-11-02 20:49:22,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0d5d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:22, skipping insertion in model container [2022-11-02 20:49:22,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:22" (3/3) ... [2022-11-02 20:49:22,275 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2022-11-02 20:49:22,284 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:49:22,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:22,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:49:22,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:49:22,347 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:22,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 106 transitions, 217 flow [2022-11-02 20:49:22,487 INFO L130 PetriNetUnfolder]: 14/140 cut-off events. [2022-11-02 20:49:22,487 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:22,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 315 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-11-02 20:49:22,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 106 transitions, 217 flow [2022-11-02 20:49:22,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 106 transitions, 217 flow [2022-11-02 20:49:22,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:22,515 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:22,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:22,560 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-02 20:49:22,566 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:22,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:22,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:22,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1463212038, now seen corresponding path program 1 times [2022-11-02 20:49:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:22,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324958965] [2022-11-02 20:49:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:22,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:22,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324958965] [2022-11-02 20:49:22,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324958965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:22,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:22,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045619140] [2022-11-02 20:49:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:22,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:22,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:22,872 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 106 [2022-11-02 20:49:22,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 217 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:22,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 106 [2022-11-02 20:49:22,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:22,937 INFO L130 PetriNetUnfolder]: 0/124 cut-off events. [2022-11-02 20:49:22,937 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:49:22,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 124 events. 0/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 0 based on Foata normal form. 14/134 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-02 20:49:22,939 INFO L137 encePairwiseOnDemand]: 96/106 looper letters, 1 selfloop transitions, 0 changer transitions 12/95 dead transitions. [2022-11-02 20:49:22,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 197 flow [2022-11-02 20:49:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-11-02 20:49:22,952 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9386792452830188 [2022-11-02 20:49:22,953 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-11-02 20:49:22,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-11-02 20:49:22,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:22,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-11-02 20:49:22,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,966 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,968 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 217 flow. Second operand 2 states and 199 transitions. [2022-11-02 20:49:22,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 197 flow [2022-11-02 20:49:22,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 95 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:22,980 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 171 flow [2022-11-02 20:49:22,982 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2022-11-02 20:49:22,985 INFO L287 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-11-02 20:49:22,985 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 171 flow [2022-11-02 20:49:22,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:22,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:22,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:49:22,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1169809031, now seen corresponding path program 1 times [2022-11-02 20:49:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:22,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18350505] [2022-11-02 20:49:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:22,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18350505] [2022-11-02 20:49:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18350505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:23,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:23,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499497052] [2022-11-02 20:49:23,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:23,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:23,178 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 106 [2022-11-02 20:49:23,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:23,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 106 [2022-11-02 20:49:23,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:23,236 INFO L130 PetriNetUnfolder]: 0/87 cut-off events. [2022-11-02 20:49:23,236 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:23,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 87 events. 0/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-02 20:49:23,237 INFO L137 encePairwiseOnDemand]: 103/106 looper letters, 8 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-11-02 20:49:23,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 195 flow [2022-11-02 20:49:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-11-02 20:49:23,241 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8553459119496856 [2022-11-02 20:49:23,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-11-02 20:49:23,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-11-02 20:49:23,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:23,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-11-02 20:49:23,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,247 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 171 flow. Second operand 3 states and 272 transitions. [2022-11-02 20:49:23,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 195 flow [2022-11-02 20:49:23,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:23,250 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 179 flow [2022-11-02 20:49:23,251 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2022-11-02 20:49:23,251 INFO L287 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-11-02 20:49:23,252 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 179 flow [2022-11-02 20:49:23,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:23,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:23,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:49:23,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash 602894772, now seen corresponding path program 1 times [2022-11-02 20:49:23,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:23,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683859455] [2022-11-02 20:49:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:23,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:23,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:23,429 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:23,430 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:23,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:49:23,432 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-02 20:49:23,435 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:23,435 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-02 20:49:23,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 139 transitions, 290 flow [2022-11-02 20:49:23,508 INFO L130 PetriNetUnfolder]: 24/212 cut-off events. [2022-11-02 20:49:23,508 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:49:23,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 212 events. 24/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-11-02 20:49:23,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 139 transitions, 290 flow [2022-11-02 20:49:23,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 139 transitions, 290 flow [2022-11-02 20:49:23,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:23,516 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:23,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:23,530 INFO L130 PetriNetUnfolder]: 5/91 cut-off events. [2022-11-02 20:49:23,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:23,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:23,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:23,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2146504794, now seen corresponding path program 1 times [2022-11-02 20:49:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:23,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249176664] [2022-11-02 20:49:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:23,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249176664] [2022-11-02 20:49:23,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249176664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:23,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:23,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416418296] [2022-11-02 20:49:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:23,605 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 139 [2022-11-02 20:49:23,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:23,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 139 [2022-11-02 20:49:23,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:23,660 INFO L130 PetriNetUnfolder]: 0/185 cut-off events. [2022-11-02 20:49:23,660 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:49:23,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 0/185 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 441 event pairs, 0 based on Foata normal form. 26/205 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-02 20:49:23,661 INFO L137 encePairwiseOnDemand]: 123/139 looper letters, 2 selfloop transitions, 0 changer transitions 12/122 dead transitions. [2022-11-02 20:49:23,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 122 transitions, 260 flow [2022-11-02 20:49:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-11-02 20:49:23,663 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9280575539568345 [2022-11-02 20:49:23,663 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-11-02 20:49:23,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-11-02 20:49:23,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:23,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-11-02 20:49:23,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,667 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,667 INFO L175 Difference]: Start difference. First operand has 128 places, 139 transitions, 290 flow. Second operand 2 states and 258 transitions. [2022-11-02 20:49:23,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 122 transitions, 260 flow [2022-11-02 20:49:23,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 122 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:23,671 INFO L231 Difference]: Finished difference. Result has 128 places, 110 transitions, 230 flow [2022-11-02 20:49:23,672 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=128, PETRI_TRANSITIONS=110} [2022-11-02 20:49:23,672 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-11-02 20:49:23,673 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 110 transitions, 230 flow [2022-11-02 20:49:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:23,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:23,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:49:23,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059495, now seen corresponding path program 1 times [2022-11-02 20:49:23,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063182529] [2022-11-02 20:49:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:23,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:23,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:23,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063182529] [2022-11-02 20:49:23,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063182529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:23,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:23,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479923444] [2022-11-02 20:49:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:23,796 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 139 [2022-11-02 20:49:23,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:23,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 139 [2022-11-02 20:49:23,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:23,834 INFO L130 PetriNetUnfolder]: 0/136 cut-off events. [2022-11-02 20:49:23,834 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-02 20:49:23,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 136 events. 0/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 219 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-02 20:49:23,835 INFO L137 encePairwiseOnDemand]: 136/139 looper letters, 11 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2022-11-02 20:49:23,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 264 flow [2022-11-02 20:49:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-11-02 20:49:23,838 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8465227817745803 [2022-11-02 20:49:23,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-11-02 20:49:23,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-11-02 20:49:23,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:23,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-11-02 20:49:23,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,855 INFO L175 Difference]: Start difference. First operand has 128 places, 110 transitions, 230 flow. Second operand 3 states and 353 transitions. [2022-11-02 20:49:23,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 264 flow [2022-11-02 20:49:23,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:23,858 INFO L231 Difference]: Finished difference. Result has 119 places, 111 transitions, 242 flow [2022-11-02 20:49:23,859 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2022-11-02 20:49:23,859 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, -9 predicate places. [2022-11-02 20:49:23,859 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 242 flow [2022-11-02 20:49:23,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:23,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:23,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:23,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:49:23,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1922399296, now seen corresponding path program 1 times [2022-11-02 20:49:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:23,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080184952] [2022-11-02 20:49:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:24,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080184952] [2022-11-02 20:49:24,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080184952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923199805] [2022-11-02 20:49:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:24,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:24,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:24,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:24,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:49:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:24,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:24,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923199805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:24,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:24,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471436654] [2022-11-02 20:49:24,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:24,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:24,278 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 139 [2022-11-02 20:49:24,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:24,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:24,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 139 [2022-11-02 20:49:24,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:24,402 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2022-11-02 20:49:24,418 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:49:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-02 20:49:24,419 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-02 20:49:24,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-11-02 20:49:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-11-02 20:49:24,423 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8201438848920863 [2022-11-02 20:49:24,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-11-02 20:49:24,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-11-02 20:49:24,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:24,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-11-02 20:49:24,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:24,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:24,443 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:24,443 INFO L175 Difference]: Start difference. First operand has 119 places, 111 transitions, 242 flow. Second operand 9 states and 1026 transitions. [2022-11-02 20:49:24,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-11-02 20:49:24,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:24,446 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-11-02 20:49:24,447 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-11-02 20:49:24,447 INFO L287 CegarLoopForPetriNet]: 128 programPoint places, -15 predicate places. [2022-11-02 20:49:24,448 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-11-02 20:49:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:24,452 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:24,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:49:24,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1177181810, now seen corresponding path program 1 times [2022-11-02 20:49:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373133075] [2022-11-02 20:49:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:24,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:24,721 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:24,721 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:24,728 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:24,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:24,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:49:24,729 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:49:24,729 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:24,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-02 20:49:24,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:24,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 172 transitions, 365 flow [2022-11-02 20:49:24,860 INFO L130 PetriNetUnfolder]: 34/284 cut-off events. [2022-11-02 20:49:24,860 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:49:24,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 867 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2022-11-02 20:49:24,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 172 transitions, 365 flow [2022-11-02 20:49:24,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 172 transitions, 365 flow [2022-11-02 20:49:24,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:24,878 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:24,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:24,892 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-02 20:49:24,897 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:24,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:24,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:24,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash 277282342, now seen corresponding path program 1 times [2022-11-02 20:49:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:24,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521721064] [2022-11-02 20:49:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:24,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:24,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:24,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521721064] [2022-11-02 20:49:24,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521721064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:24,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:24,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838379044] [2022-11-02 20:49:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:24,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:24,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:24,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:24,963 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-11-02 20:49:24,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 365 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:24,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:24,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-11-02 20:49:24,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:25,031 INFO L130 PetriNetUnfolder]: 0/246 cut-off events. [2022-11-02 20:49:25,032 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-02 20:49:25,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 0/246 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 722 event pairs, 0 based on Foata normal form. 42/280 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-02 20:49:25,033 INFO L137 encePairwiseOnDemand]: 150/172 looper letters, 3 selfloop transitions, 0 changer transitions 12/149 dead transitions. [2022-11-02 20:49:25,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 325 flow [2022-11-02 20:49:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-11-02 20:49:25,035 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9215116279069767 [2022-11-02 20:49:25,035 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-11-02 20:49:25,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-11-02 20:49:25,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:25,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-11-02 20:49:25,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,044 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,044 INFO L175 Difference]: Start difference. First operand has 157 places, 172 transitions, 365 flow. Second operand 2 states and 317 transitions. [2022-11-02 20:49:25,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 325 flow [2022-11-02 20:49:25,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 319 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:25,051 INFO L231 Difference]: Finished difference. Result has 157 places, 137 transitions, 289 flow [2022-11-02 20:49:25,052 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=289, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2022-11-02 20:49:25,055 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-11-02 20:49:25,056 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 289 flow [2022-11-02 20:49:25,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:25,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:25,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:49:25,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:25,058 INFO L85 PathProgramCache]: Analyzing trace with hash -16120665, now seen corresponding path program 1 times [2022-11-02 20:49:25,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:25,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475818854] [2022-11-02 20:49:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:25,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:25,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475818854] [2022-11-02 20:49:25,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475818854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:25,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:25,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474009355] [2022-11-02 20:49:25,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:25,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:25,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:25,157 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 172 [2022-11-02 20:49:25,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:25,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 172 [2022-11-02 20:49:25,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:25,227 INFO L130 PetriNetUnfolder]: 0/185 cut-off events. [2022-11-02 20:49:25,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:49:25,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 185 events. 0/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-02 20:49:25,228 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2022-11-02 20:49:25,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 325 flow [2022-11-02 20:49:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-11-02 20:49:25,232 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8372093023255814 [2022-11-02 20:49:25,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-11-02 20:49:25,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-11-02 20:49:25,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:25,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-11-02 20:49:25,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,239 INFO L175 Difference]: Start difference. First operand has 157 places, 137 transitions, 289 flow. Second operand 3 states and 432 transitions. [2022-11-02 20:49:25,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 325 flow [2022-11-02 20:49:25,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:25,242 INFO L231 Difference]: Finished difference. Result has 148 places, 138 transitions, 301 flow [2022-11-02 20:49:25,243 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2022-11-02 20:49:25,245 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, -9 predicate places. [2022-11-02 20:49:25,245 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 301 flow [2022-11-02 20:49:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:25,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:49:25,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1156559264, now seen corresponding path program 1 times [2022-11-02 20:49:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110475108] [2022-11-02 20:49:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:25,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:25,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110475108] [2022-11-02 20:49:25,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110475108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727411787] [2022-11-02 20:49:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:25,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:25,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:25,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:25,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:49:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:25,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:25,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727411787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:25,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:25,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117096720] [2022-11-02 20:49:25,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:25,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:25,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:25,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:25,612 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 172 [2022-11-02 20:49:25,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:25,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 172 [2022-11-02 20:49:25,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:25,722 INFO L130 PetriNetUnfolder]: 0/159 cut-off events. [2022-11-02 20:49:25,722 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:49:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 159 events. 0/159 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 247 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:49:25,723 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-11-02 20:49:25,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 367 flow [2022-11-02 20:49:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1266 transitions. [2022-11-02 20:49:25,726 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8178294573643411 [2022-11-02 20:49:25,727 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1266 transitions. [2022-11-02 20:49:25,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1266 transitions. [2022-11-02 20:49:25,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:25,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1266 transitions. [2022-11-02 20:49:25,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,735 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,735 INFO L175 Difference]: Start difference. First operand has 148 places, 138 transitions, 301 flow. Second operand 9 states and 1266 transitions. [2022-11-02 20:49:25,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 367 flow [2022-11-02 20:49:25,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 148 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:25,738 INFO L231 Difference]: Finished difference. Result has 158 places, 144 transitions, 349 flow [2022-11-02 20:49:25,739 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2022-11-02 20:49:25,739 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 1 predicate places. [2022-11-02 20:49:25,740 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 349 flow [2022-11-02 20:49:25,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:25,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:25,741 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:25,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:25,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:49:25,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1450639895, now seen corresponding path program 1 times [2022-11-02 20:49:25,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:25,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140153439] [2022-11-02 20:49:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:25,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:25,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:26,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:26,009 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:26,009 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:26,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:26,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:49:26,009 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:49:26,010 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:26,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-02 20:49:26,034 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:26,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 205 transitions, 442 flow [2022-11-02 20:49:26,117 INFO L130 PetriNetUnfolder]: 44/356 cut-off events. [2022-11-02 20:49:26,117 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:49:26,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 44/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1152 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2022-11-02 20:49:26,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 205 transitions, 442 flow [2022-11-02 20:49:26,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 205 transitions, 442 flow [2022-11-02 20:49:26,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:26,126 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:26,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:26,134 INFO L130 PetriNetUnfolder]: 5/91 cut-off events. [2022-11-02 20:49:26,135 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:26,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:26,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:26,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 144638854, now seen corresponding path program 1 times [2022-11-02 20:49:26,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:26,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662952785] [2022-11-02 20:49:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:26,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:26,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662952785] [2022-11-02 20:49:26,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662952785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:26,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:26,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:26,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747712543] [2022-11-02 20:49:26,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:26,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:26,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:26,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:26,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:26,158 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 205 [2022-11-02 20:49:26,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:26,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 205 [2022-11-02 20:49:26,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:26,223 INFO L130 PetriNetUnfolder]: 0/307 cut-off events. [2022-11-02 20:49:26,223 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-02 20:49:26,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 307 events. 0/307 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 980 event pairs, 0 based on Foata normal form. 64/361 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-11-02 20:49:26,224 INFO L137 encePairwiseOnDemand]: 177/205 looper letters, 4 selfloop transitions, 0 changer transitions 12/176 dead transitions. [2022-11-02 20:49:26,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 392 flow [2022-11-02 20:49:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2022-11-02 20:49:26,226 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9170731707317074 [2022-11-02 20:49:26,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2022-11-02 20:49:26,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2022-11-02 20:49:26,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:26,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2022-11-02 20:49:26,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,229 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,229 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 442 flow. Second operand 2 states and 376 transitions. [2022-11-02 20:49:26,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 392 flow [2022-11-02 20:49:26,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 176 transitions, 380 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:26,233 INFO L231 Difference]: Finished difference. Result has 186 places, 164 transitions, 348 flow [2022-11-02 20:49:26,233 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=348, PETRI_PLACES=186, PETRI_TRANSITIONS=164} [2022-11-02 20:49:26,234 INFO L287 CegarLoopForPetriNet]: 186 programPoint places, 0 predicate places. [2022-11-02 20:49:26,234 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 164 transitions, 348 flow [2022-11-02 20:49:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:26,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:26,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:49:26,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -148764153, now seen corresponding path program 1 times [2022-11-02 20:49:26,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263039003] [2022-11-02 20:49:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:26,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263039003] [2022-11-02 20:49:26,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263039003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:26,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:26,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:26,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639708062] [2022-11-02 20:49:26,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:26,275 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 205 [2022-11-02 20:49:26,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 164 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:26,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 205 [2022-11-02 20:49:26,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:26,337 INFO L130 PetriNetUnfolder]: 0/234 cut-off events. [2022-11-02 20:49:26,337 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:49:26,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 234 events. 0/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 587 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-02 20:49:26,338 INFO L137 encePairwiseOnDemand]: 202/205 looper letters, 13 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-11-02 20:49:26,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 386 flow [2022-11-02 20:49:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-11-02 20:49:26,340 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8308943089430895 [2022-11-02 20:49:26,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-11-02 20:49:26,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-11-02 20:49:26,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:26,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-11-02 20:49:26,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,344 INFO L175 Difference]: Start difference. First operand has 186 places, 164 transitions, 348 flow. Second operand 3 states and 511 transitions. [2022-11-02 20:49:26,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 386 flow [2022-11-02 20:49:26,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 168 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:26,348 INFO L231 Difference]: Finished difference. Result has 177 places, 165 transitions, 360 flow [2022-11-02 20:49:26,349 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=177, PETRI_TRANSITIONS=165} [2022-11-02 20:49:26,350 INFO L287 CegarLoopForPetriNet]: 186 programPoint places, -9 predicate places. [2022-11-02 20:49:26,350 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 360 flow [2022-11-02 20:49:26,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:26,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:26,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:49:26,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash -965032960, now seen corresponding path program 1 times [2022-11-02 20:49:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583230402] [2022-11-02 20:49:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:26,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583230402] [2022-11-02 20:49:26,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583230402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923955445] [2022-11-02 20:49:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:26,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:26,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:49:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:26,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:26,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:26,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923955445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:26,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:26,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121552502] [2022-11-02 20:49:26,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:26,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:26,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:26,671 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-11-02 20:49:26,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 165 transitions, 360 flow. Second operand has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:26,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-11-02 20:49:26,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:26,810 INFO L130 PetriNetUnfolder]: 0/208 cut-off events. [2022-11-02 20:49:26,810 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:49:26,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:49:26,811 INFO L137 encePairwiseOnDemand]: 199/205 looper letters, 14 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-11-02 20:49:26,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 428 flow [2022-11-02 20:49:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-11-02 20:49:26,815 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.813550135501355 [2022-11-02 20:49:26,815 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-11-02 20:49:26,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-11-02 20:49:26,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:26,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-11-02 20:49:26,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,825 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,825 INFO L175 Difference]: Start difference. First operand has 177 places, 165 transitions, 360 flow. Second operand 9 states and 1501 transitions. [2022-11-02 20:49:26,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 428 flow [2022-11-02 20:49:26,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 175 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:26,831 INFO L231 Difference]: Finished difference. Result has 187 places, 171 transitions, 408 flow [2022-11-02 20:49:26,831 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-11-02 20:49:26,832 INFO L287 CegarLoopForPetriNet]: 186 programPoint places, 1 predicate places. [2022-11-02 20:49:26,832 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 408 flow [2022-11-02 20:49:26,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:26,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:26,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:27,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:49:27,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1583364555, now seen corresponding path program 1 times [2022-11-02 20:49:27,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:27,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097612860] [2022-11-02 20:49:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:27,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097612860] [2022-11-02 20:49:27,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097612860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:27,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963686374] [2022-11-02 20:49:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:27,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:27,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:49:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:27,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963686374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:27,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:27,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486942741] [2022-11-02 20:49:27,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:27,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:27,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:27,583 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-11-02 20:49:27,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 408 flow. Second operand has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:27,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-11-02 20:49:27,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:27,745 INFO L130 PetriNetUnfolder]: 0/182 cut-off events. [2022-11-02 20:49:27,745 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:49:27,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-02 20:49:27,746 INFO L137 encePairwiseOnDemand]: 200/205 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-11-02 20:49:27,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-11-02 20:49:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:49:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 20:49:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2022-11-02 20:49:27,751 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8097560975609757 [2022-11-02 20:49:27,752 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2022-11-02 20:49:27,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2022-11-02 20:49:27,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:27,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2022-11-02 20:49:27,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,765 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,765 INFO L175 Difference]: Start difference. First operand has 187 places, 171 transitions, 408 flow. Second operand 15 states and 2490 transitions. [2022-11-02 20:49:27,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-11-02 20:49:27,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-02 20:49:27,769 INFO L231 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-11-02 20:49:27,770 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-11-02 20:49:27,770 INFO L287 CegarLoopForPetriNet]: 186 programPoint places, -2 predicate places. [2022-11-02 20:49:27,770 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-11-02 20:49:27,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:27,772 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:27,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:27,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:49:27,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1301575835, now seen corresponding path program 1 times [2022-11-02 20:49:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95379488] [2022-11-02 20:49:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:27,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:28,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:28,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:28,037 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:28,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:28,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:49:28,037 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:49:28,038 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:28,038 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-02 20:49:28,064 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:28,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 238 transitions, 521 flow [2022-11-02 20:49:28,168 INFO L130 PetriNetUnfolder]: 54/428 cut-off events. [2022-11-02 20:49:28,168 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:49:28,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 428 events. 54/428 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1427 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 369. Up to 12 conditions per place. [2022-11-02 20:49:28,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 238 transitions, 521 flow [2022-11-02 20:49:28,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 238 transitions, 521 flow [2022-11-02 20:49:28,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:28,184 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:28,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:28,195 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-02 20:49:28,195 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:28,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:28,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:28,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1457129031, now seen corresponding path program 1 times [2022-11-02 20:49:28,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:28,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815300927] [2022-11-02 20:49:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:28,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:28,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815300927] [2022-11-02 20:49:28,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815300927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:28,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:28,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:28,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98301000] [2022-11-02 20:49:28,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:28,234 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 238 [2022-11-02 20:49:28,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:28,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 238 [2022-11-02 20:49:28,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:28,330 INFO L130 PetriNetUnfolder]: 0/343 cut-off events. [2022-11-02 20:49:28,330 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:49:28,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 343 events. 0/343 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1138 event pairs, 0 based on Foata normal form. 379/712 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-02 20:49:28,332 INFO L137 encePairwiseOnDemand]: 201/238 looper letters, 14 selfloop transitions, 2 changer transitions 12/207 dead transitions. [2022-11-02 20:49:28,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 207 transitions, 491 flow [2022-11-02 20:49:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-02 20:49:28,334 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8837535014005602 [2022-11-02 20:49:28,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-02 20:49:28,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-02 20:49:28,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:28,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-02 20:49:28,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,338 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 521 flow. Second operand 3 states and 631 transitions. [2022-11-02 20:49:28,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 207 transitions, 491 flow [2022-11-02 20:49:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 207 transitions, 471 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:28,343 INFO L231 Difference]: Finished difference. Result has 217 places, 192 transitions, 419 flow [2022-11-02 20:49:28,343 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=419, PETRI_PLACES=217, PETRI_TRANSITIONS=192} [2022-11-02 20:49:28,344 INFO L287 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-11-02 20:49:28,344 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 192 transitions, 419 flow [2022-11-02 20:49:28,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:28,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:28,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:49:28,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:28,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1797989088, now seen corresponding path program 1 times [2022-11-02 20:49:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:28,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081784199] [2022-11-02 20:49:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:28,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081784199] [2022-11-02 20:49:28,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081784199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717199050] [2022-11-02 20:49:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:28,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:28,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:28,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:49:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:28,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:28,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:28,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717199050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:28,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:28,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797565171] [2022-11-02 20:49:28,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:28,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:28,658 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-11-02 20:49:28,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 192 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:28,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-11-02 20:49:28,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:28,799 INFO L130 PetriNetUnfolder]: 0/257 cut-off events. [2022-11-02 20:49:28,799 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:49:28,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 257 events. 0/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 613 event pairs, 0 based on Foata normal form. 2/259 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:49:28,800 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 15 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-11-02 20:49:28,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 202 transitions, 489 flow [2022-11-02 20:49:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1736 transitions. [2022-11-02 20:49:28,804 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8104575163398693 [2022-11-02 20:49:28,804 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1736 transitions. [2022-11-02 20:49:28,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1736 transitions. [2022-11-02 20:49:28,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:28,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1736 transitions. [2022-11-02 20:49:28,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,828 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,828 INFO L175 Difference]: Start difference. First operand has 217 places, 192 transitions, 419 flow. Second operand 9 states and 1736 transitions. [2022-11-02 20:49:28,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 202 transitions, 489 flow [2022-11-02 20:49:28,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:28,833 INFO L231 Difference]: Finished difference. Result has 215 places, 198 transitions, 467 flow [2022-11-02 20:49:28,833 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=215, PETRI_TRANSITIONS=198} [2022-11-02 20:49:28,833 INFO L287 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-11-02 20:49:28,834 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 198 transitions, 467 flow [2022-11-02 20:49:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:28,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:28,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:28,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:49:29,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1377325333, now seen corresponding path program 1 times [2022-11-02 20:49:29,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:29,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141460689] [2022-11-02 20:49:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:29,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:29,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141460689] [2022-11-02 20:49:29,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141460689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619164114] [2022-11-02 20:49:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:29,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:29,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:29,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:29,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:49:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:29,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:29,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619164114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:29,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:29,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451339811] [2022-11-02 20:49:29,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:29,571 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-11-02 20:49:29,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 198 transitions, 467 flow. Second operand has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:29,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:29,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-11-02 20:49:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:29,797 INFO L130 PetriNetUnfolder]: 0/218 cut-off events. [2022-11-02 20:49:29,797 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 20:49:29,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:49:29,798 INFO L137 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-11-02 20:49:29,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 565 flow [2022-11-02 20:49:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:49:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 20:49:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3457 transitions. [2022-11-02 20:49:29,806 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8069561157796452 [2022-11-02 20:49:29,807 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3457 transitions. [2022-11-02 20:49:29,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3457 transitions. [2022-11-02 20:49:29,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:29,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3457 transitions. [2022-11-02 20:49:29,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 192.05555555555554) internal successors, (3457), 18 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:29,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:29,825 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:29,825 INFO L175 Difference]: Start difference. First operand has 215 places, 198 transitions, 467 flow. Second operand 18 states and 3457 transitions. [2022-11-02 20:49:29,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 565 flow [2022-11-02 20:49:29,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-02 20:49:29,830 INFO L231 Difference]: Finished difference. Result has 215 places, 191 transitions, 480 flow [2022-11-02 20:49:29,831 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-11-02 20:49:29,832 INFO L287 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-11-02 20:49:29,832 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 480 flow [2022-11-02 20:49:29,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:29,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:29,833 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:29,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 20:49:30,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:30,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash -544530782, now seen corresponding path program 1 times [2022-11-02 20:49:30,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:30,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275470347] [2022-11-02 20:49:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:30,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:30,072 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:30,114 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:30,114 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:30,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:30,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:30,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:49:30,115 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:49:30,115 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:30,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-02 20:49:30,147 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:30,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 271 transitions, 602 flow [2022-11-02 20:49:30,266 INFO L130 PetriNetUnfolder]: 64/500 cut-off events. [2022-11-02 20:49:30,267 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-02 20:49:30,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 500 events. 64/500 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1717 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 447. Up to 14 conditions per place. [2022-11-02 20:49:30,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 271 transitions, 602 flow [2022-11-02 20:49:30,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 271 transitions, 602 flow [2022-11-02 20:49:30,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:30,283 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:30,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:30,290 INFO L130 PetriNetUnfolder]: 4/88 cut-off events. [2022-11-02 20:49:30,291 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:30,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:30,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:30,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:30,292 INFO L85 PathProgramCache]: Analyzing trace with hash 799994598, now seen corresponding path program 1 times [2022-11-02 20:49:30,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:30,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861952193] [2022-11-02 20:49:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:30,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:30,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861952193] [2022-11-02 20:49:30,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861952193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:30,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:30,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:30,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638587347] [2022-11-02 20:49:30,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:30,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:30,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:30,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:30,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:30,312 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 271 [2022-11-02 20:49:30,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 602 flow. Second operand has 2 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:30,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 271 [2022-11-02 20:49:30,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:30,410 INFO L130 PetriNetUnfolder]: 0/429 cut-off events. [2022-11-02 20:49:30,410 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-02 20:49:30,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 429 events. 0/429 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1534 event pairs, 0 based on Foata normal form. 126/541 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-02 20:49:30,412 INFO L137 encePairwiseOnDemand]: 231/271 looper letters, 6 selfloop transitions, 0 changer transitions 12/230 dead transitions. [2022-11-02 20:49:30,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 230 transitions, 532 flow [2022-11-02 20:49:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 494 transitions. [2022-11-02 20:49:30,414 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9114391143911439 [2022-11-02 20:49:30,414 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 494 transitions. [2022-11-02 20:49:30,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 494 transitions. [2022-11-02 20:49:30,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:30,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 494 transitions. [2022-11-02 20:49:30,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.0) internal successors, (494), 2 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,417 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,417 INFO L175 Difference]: Start difference. First operand has 244 places, 271 transitions, 602 flow. Second operand 2 states and 494 transitions. [2022-11-02 20:49:30,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 230 transitions, 532 flow [2022-11-02 20:49:30,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 230 transitions, 502 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:30,423 INFO L231 Difference]: Finished difference. Result has 244 places, 218 transitions, 466 flow [2022-11-02 20:49:30,424 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=466, PETRI_PLACES=244, PETRI_TRANSITIONS=218} [2022-11-02 20:49:30,424 INFO L287 CegarLoopForPetriNet]: 244 programPoint places, 0 predicate places. [2022-11-02 20:49:30,425 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 218 transitions, 466 flow [2022-11-02 20:49:30,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:30,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:30,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:49:30,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash 506591591, now seen corresponding path program 1 times [2022-11-02 20:49:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:30,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873400188] [2022-11-02 20:49:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:30,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:30,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:30,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873400188] [2022-11-02 20:49:30,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873400188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:30,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:30,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:30,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042015440] [2022-11-02 20:49:30,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:30,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:30,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:30,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:30,468 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 271 [2022-11-02 20:49:30,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 218 transitions, 466 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:30,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 271 [2022-11-02 20:49:30,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:30,600 INFO L130 PetriNetUnfolder]: 0/332 cut-off events. [2022-11-02 20:49:30,600 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-02 20:49:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 954 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-02 20:49:30,602 INFO L137 encePairwiseOnDemand]: 268/271 looper letters, 15 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2022-11-02 20:49:30,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 222 transitions, 508 flow [2022-11-02 20:49:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2022-11-02 20:49:30,605 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8228782287822878 [2022-11-02 20:49:30,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2022-11-02 20:49:30,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2022-11-02 20:49:30,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:30,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2022-11-02 20:49:30,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,611 INFO L175 Difference]: Start difference. First operand has 244 places, 218 transitions, 466 flow. Second operand 3 states and 669 transitions. [2022-11-02 20:49:30,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 222 transitions, 508 flow [2022-11-02 20:49:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 222 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:30,617 INFO L231 Difference]: Finished difference. Result has 235 places, 219 transitions, 478 flow [2022-11-02 20:49:30,617 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=478, PETRI_PLACES=235, PETRI_TRANSITIONS=219} [2022-11-02 20:49:30,618 INFO L287 CegarLoopForPetriNet]: 244 programPoint places, -9 predicate places. [2022-11-02 20:49:30,618 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 219 transitions, 478 flow [2022-11-02 20:49:30,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:30,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:30,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:49:30,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash 639539648, now seen corresponding path program 1 times [2022-11-02 20:49:30,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:30,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697301091] [2022-11-02 20:49:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:30,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697301091] [2022-11-02 20:49:30,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697301091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:30,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343813641] [2022-11-02 20:49:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:30,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:30,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:30,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:49:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343813641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:30,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:30,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885289681] [2022-11-02 20:49:30,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:30,927 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-11-02 20:49:30,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 219 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:30,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:30,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-11-02 20:49:30,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:31,090 INFO L130 PetriNetUnfolder]: 0/306 cut-off events. [2022-11-02 20:49:31,090 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-02 20:49:31,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 306 events. 0/306 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 798 event pairs, 0 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:49:31,092 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 16 selfloop transitions, 9 changer transitions 0/229 dead transitions. [2022-11-02 20:49:31,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 229 transitions, 550 flow [2022-11-02 20:49:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1971 transitions. [2022-11-02 20:49:31,097 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8081180811808119 [2022-11-02 20:49:31,097 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1971 transitions. [2022-11-02 20:49:31,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1971 transitions. [2022-11-02 20:49:31,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:31,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1971 transitions. [2022-11-02 20:49:31,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:31,106 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) [2022-11-02 20:49:31,107 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) [2022-11-02 20:49:31,108 INFO L175 Difference]: Start difference. First operand has 235 places, 219 transitions, 478 flow. Second operand 9 states and 1971 transitions. [2022-11-02 20:49:31,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 229 transitions, 550 flow [2022-11-02 20:49:31,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 229 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:31,114 INFO L231 Difference]: Finished difference. Result has 245 places, 225 transitions, 526 flow [2022-11-02 20:49:31,114 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=245, PETRI_TRANSITIONS=225} [2022-11-02 20:49:31,115 INFO L287 CegarLoopForPetriNet]: 244 programPoint places, 1 predicate places. [2022-11-02 20:49:31,115 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 225 transitions, 526 flow [2022-11-02 20:49:31,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:31,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:31,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:31,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:31,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:31,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2089549643, now seen corresponding path program 1 times [2022-11-02 20:49:31,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:31,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160017216] [2022-11-02 20:49:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:31,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160017216] [2022-11-02 20:49:31,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160017216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796165385] [2022-11-02 20:49:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:31,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:31,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:49:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:31,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:31,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796165385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:31,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:31,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745421058] [2022-11-02 20:49:31,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:31,812 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-11-02 20:49:31,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 225 transitions, 526 flow. Second operand has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 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) [2022-11-02 20:49:31,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:31,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-11-02 20:49:31,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:32,077 INFO L130 PetriNetUnfolder]: 0/254 cut-off events. [2022-11-02 20:49:32,077 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-02 20:49:32,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-02 20:49:32,078 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-11-02 20:49:32,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-11-02 20:49:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4580 transitions. [2022-11-02 20:49:32,085 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8047794763661922 [2022-11-02 20:49:32,085 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4580 transitions. [2022-11-02 20:49:32,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4580 transitions. [2022-11-02 20:49:32,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:32,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4580 transitions. [2022-11-02 20:49:32,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 218.0952380952381) internal successors, (4580), 21 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,103 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) [2022-11-02 20:49:32,105 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) [2022-11-02 20:49:32,106 INFO L175 Difference]: Start difference. First operand has 245 places, 225 transitions, 526 flow. Second operand 21 states and 4580 transitions. [2022-11-02 20:49:32,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-11-02 20:49:32,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-02 20:49:32,111 INFO L231 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-11-02 20:49:32,112 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-11-02 20:49:32,112 INFO L287 CegarLoopForPetriNet]: 244 programPoint places, 4 predicate places. [2022-11-02 20:49:32,113 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-11-02 20:49:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 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) [2022-11-02 20:49:32,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:32,115 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:32,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:32,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:49:32,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:32,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1513194560, now seen corresponding path program 1 times [2022-11-02 20:49:32,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:32,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658177839] [2022-11-02 20:49:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:32,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:32,371 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:32,397 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:32,398 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:32,398 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:32,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:32,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-02 20:49:32,399 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:49:32,401 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:32,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-02 20:49:32,448 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:32,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 304 transitions, 685 flow [2022-11-02 20:49:32,581 INFO L130 PetriNetUnfolder]: 74/572 cut-off events. [2022-11-02 20:49:32,581 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-02 20:49:32,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 572 events. 74/572 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2003 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 526. Up to 16 conditions per place. [2022-11-02 20:49:32,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 304 transitions, 685 flow [2022-11-02 20:49:32,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 304 transitions, 685 flow [2022-11-02 20:49:32,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:32,605 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:32,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:32,613 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-02 20:49:32,614 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:32,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:32,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:32,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1294590823, now seen corresponding path program 1 times [2022-11-02 20:49:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598595041] [2022-11-02 20:49:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:32,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598595041] [2022-11-02 20:49:32,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598595041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:32,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:32,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:32,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926937683] [2022-11-02 20:49:32,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:32,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:32,656 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 304 [2022-11-02 20:49:32,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 304 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:32,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 304 [2022-11-02 20:49:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:32,822 INFO L130 PetriNetUnfolder]: 0/465 cut-off events. [2022-11-02 20:49:32,823 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-02 20:49:32,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 465 events. 0/465 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1691 event pairs, 0 based on Foata normal form. 773/1224 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-02 20:49:32,828 INFO L137 encePairwiseOnDemand]: 255/304 looper letters, 16 selfloop transitions, 2 changer transitions 12/261 dead transitions. [2022-11-02 20:49:32,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 261 transitions, 635 flow [2022-11-02 20:49:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2022-11-02 20:49:32,830 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8782894736842105 [2022-11-02 20:49:32,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2022-11-02 20:49:32,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2022-11-02 20:49:32,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:32,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2022-11-02 20:49:32,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,837 INFO L175 Difference]: Start difference. First operand has 273 places, 304 transitions, 685 flow. Second operand 3 states and 801 transitions. [2022-11-02 20:49:32,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 261 transitions, 635 flow [2022-11-02 20:49:32,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 261 transitions, 593 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:32,843 INFO L231 Difference]: Finished difference. Result has 275 places, 246 transitions, 537 flow [2022-11-02 20:49:32,844 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-11-02 20:49:32,844 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-11-02 20:49:32,844 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 537 flow [2022-11-02 20:49:32,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:32,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:32,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-02 20:49:32,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:32,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:32,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2052585952, now seen corresponding path program 1 times [2022-11-02 20:49:32,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:32,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376927604] [2022-11-02 20:49:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:32,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:32,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376927604] [2022-11-02 20:49:32,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376927604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:32,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164761288] [2022-11-02 20:49:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:32,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:32,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:32,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:49:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:33,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:33,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164761288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:33,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:33,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7391699] [2022-11-02 20:49:33,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:33,171 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-11-02 20:49:33,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:33,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:33,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-11-02 20:49:33,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:33,351 INFO L130 PetriNetUnfolder]: 0/355 cut-off events. [2022-11-02 20:49:33,351 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-02 20:49:33,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 355 events. 0/355 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 979 event pairs, 0 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:49:33,352 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 17 selfloop transitions, 9 changer transitions 0/256 dead transitions. [2022-11-02 20:49:33,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 256 transitions, 611 flow [2022-11-02 20:49:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2022-11-02 20:49:33,364 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8062865497076024 [2022-11-02 20:49:33,364 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2022-11-02 20:49:33,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2022-11-02 20:49:33,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:33,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2022-11-02 20:49:33,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:33,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:33,384 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:33,384 INFO L175 Difference]: Start difference. First operand has 275 places, 246 transitions, 537 flow. Second operand 9 states and 2206 transitions. [2022-11-02 20:49:33,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 256 transitions, 611 flow [2022-11-02 20:49:33,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 256 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:33,390 INFO L231 Difference]: Finished difference. Result has 273 places, 252 transitions, 585 flow [2022-11-02 20:49:33,391 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=585, PETRI_PLACES=273, PETRI_TRANSITIONS=252} [2022-11-02 20:49:33,391 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-11-02 20:49:33,391 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 252 transitions, 585 flow [2022-11-02 20:49:33,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:33,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:33,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:33,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:33,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:49:33,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash 900912405, now seen corresponding path program 1 times [2022-11-02 20:49:33,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728087611] [2022-11-02 20:49:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:33,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728087611] [2022-11-02 20:49:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728087611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763940239] [2022-11-02 20:49:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:33,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:33,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:33,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:49:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:33,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:34,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763940239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:34,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:34,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:34,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112317857] [2022-11-02 20:49:34,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:34,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:34,158 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-11-02 20:49:34,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 252 transitions, 585 flow. Second operand has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:34,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:34,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-11-02 20:49:34,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:34,466 INFO L130 PetriNetUnfolder]: 0/303 cut-off events. [2022-11-02 20:49:34,467 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-02 20:49:34,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 303 events. 0/303 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 639 event pairs, 0 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:49:34,468 INFO L137 encePairwiseOnDemand]: 298/304 looper letters, 25 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2022-11-02 20:49:34,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 276 transitions, 785 flow [2022-11-02 20:49:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5132 transitions. [2022-11-02 20:49:34,477 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8038847117794486 [2022-11-02 20:49:34,477 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5132 transitions. [2022-11-02 20:49:34,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5132 transitions. [2022-11-02 20:49:34,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:34,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5132 transitions. [2022-11-02 20:49:34,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 244.38095238095238) internal successors, (5132), 21 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:34,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:34,497 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:34,497 INFO L175 Difference]: Start difference. First operand has 273 places, 252 transitions, 585 flow. Second operand 21 states and 5132 transitions. [2022-11-02 20:49:34,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 276 transitions, 785 flow [2022-11-02 20:49:34,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 771 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:34,504 INFO L231 Difference]: Finished difference. Result has 297 places, 265 transitions, 709 flow [2022-11-02 20:49:34,504 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=709, PETRI_PLACES=297, PETRI_TRANSITIONS=265} [2022-11-02 20:49:34,505 INFO L287 CegarLoopForPetriNet]: 273 programPoint places, 24 predicate places. [2022-11-02 20:49:34,505 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 265 transitions, 709 flow [2022-11-02 20:49:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:34,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:34,507 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:34,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:34,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:49:34,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:34,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1779148577, now seen corresponding path program 1 times [2022-11-02 20:49:34,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:34,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811142740] [2022-11-02 20:49:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:34,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:34,783 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:34,784 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:34,784 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:34,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:49:34,785 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-02 20:49:34,785 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:34,785 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-02 20:49:34,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:34,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 337 transitions, 770 flow [2022-11-02 20:49:35,022 INFO L130 PetriNetUnfolder]: 84/644 cut-off events. [2022-11-02 20:49:35,022 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-02 20:49:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 644 events. 84/644 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2274 event pairs, 0 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 606. Up to 18 conditions per place. [2022-11-02 20:49:35,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 337 transitions, 770 flow [2022-11-02 20:49:35,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 337 transitions, 770 flow [2022-11-02 20:49:35,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:35,046 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:35,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:35,054 INFO L130 PetriNetUnfolder]: 4/88 cut-off events. [2022-11-02 20:49:35,055 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:35,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:35,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:35,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash -180437562, now seen corresponding path program 1 times [2022-11-02 20:49:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:35,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21020750] [2022-11-02 20:49:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21020750] [2022-11-02 20:49:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21020750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:35,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:35,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478117319] [2022-11-02 20:49:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:35,081 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 337 [2022-11-02 20:49:35,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 337 transitions, 770 flow. Second operand has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:35,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 337 [2022-11-02 20:49:35,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:35,241 INFO L130 PetriNetUnfolder]: 0/551 cut-off events. [2022-11-02 20:49:35,242 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-11-02 20:49:35,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 551 events. 0/551 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2052 event pairs, 0 based on Foata normal form. 212/745 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-02 20:49:35,243 INFO L137 encePairwiseOnDemand]: 285/337 looper letters, 8 selfloop transitions, 0 changer transitions 12/284 dead transitions. [2022-11-02 20:49:35,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 680 flow [2022-11-02 20:49:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 612 transitions. [2022-11-02 20:49:35,246 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9080118694362018 [2022-11-02 20:49:35,246 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 612 transitions. [2022-11-02 20:49:35,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 612 transitions. [2022-11-02 20:49:35,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:35,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 612 transitions. [2022-11-02 20:49:35,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 306.0) internal successors, (612), 2 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,250 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,250 INFO L175 Difference]: Start difference. First operand has 302 places, 337 transitions, 770 flow. Second operand 2 states and 612 transitions. [2022-11-02 20:49:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 680 flow [2022-11-02 20:49:35,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 284 transitions, 624 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:35,255 INFO L231 Difference]: Finished difference. Result has 302 places, 272 transitions, 584 flow [2022-11-02 20:49:35,257 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=584, PETRI_PLACES=302, PETRI_TRANSITIONS=272} [2022-11-02 20:49:35,257 INFO L287 CegarLoopForPetriNet]: 302 programPoint places, 0 predicate places. [2022-11-02 20:49:35,258 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 272 transitions, 584 flow [2022-11-02 20:49:35,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:35,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:35,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-02 20:49:35,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:35,259 INFO L85 PathProgramCache]: Analyzing trace with hash -473840569, now seen corresponding path program 1 times [2022-11-02 20:49:35,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:35,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861222331] [2022-11-02 20:49:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861222331] [2022-11-02 20:49:35,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861222331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:35,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:35,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:35,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777788428] [2022-11-02 20:49:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:35,295 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 337 [2022-11-02 20:49:35,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 272 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:35,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 337 [2022-11-02 20:49:35,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:35,469 INFO L130 PetriNetUnfolder]: 0/430 cut-off events. [2022-11-02 20:49:35,469 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-02 20:49:35,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 430 events. 0/430 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1318 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-02 20:49:35,471 INFO L137 encePairwiseOnDemand]: 334/337 looper letters, 17 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-11-02 20:49:35,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 276 transitions, 630 flow [2022-11-02 20:49:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2022-11-02 20:49:35,473 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8180019782393669 [2022-11-02 20:49:35,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2022-11-02 20:49:35,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2022-11-02 20:49:35,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:35,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2022-11-02 20:49:35,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,478 INFO L175 Difference]: Start difference. First operand has 302 places, 272 transitions, 584 flow. Second operand 3 states and 827 transitions. [2022-11-02 20:49:35,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 276 transitions, 630 flow [2022-11-02 20:49:35,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:35,483 INFO L231 Difference]: Finished difference. Result has 293 places, 273 transitions, 596 flow [2022-11-02 20:49:35,484 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=596, PETRI_PLACES=293, PETRI_TRANSITIONS=273} [2022-11-02 20:49:35,485 INFO L287 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-11-02 20:49:35,485 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 273 transitions, 596 flow [2022-11-02 20:49:35,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:35,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:35,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-02 20:49:35,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:35,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1853817472, now seen corresponding path program 1 times [2022-11-02 20:49:35,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:35,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877308745] [2022-11-02 20:49:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877308745] [2022-11-02 20:49:35,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877308745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:35,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050656090] [2022-11-02 20:49:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:35,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:35,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:35,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:49:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050656090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:35,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633707229] [2022-11-02 20:49:35,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:35,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:35,777 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-11-02 20:49:35,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 273 transitions, 596 flow. Second operand has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:35,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-11-02 20:49:35,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:35,981 INFO L130 PetriNetUnfolder]: 0/404 cut-off events. [2022-11-02 20:49:35,982 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:49:35,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 404 events. 0/404 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:49:35,983 INFO L137 encePairwiseOnDemand]: 331/337 looper letters, 18 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-11-02 20:49:35,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 283 transitions, 672 flow [2022-11-02 20:49:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2441 transitions. [2022-11-02 20:49:35,990 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048137157929443 [2022-11-02 20:49:35,990 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2441 transitions. [2022-11-02 20:49:35,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2441 transitions. [2022-11-02 20:49:35,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:35,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2441 transitions. [2022-11-02 20:49:35,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.22222222222223) internal successors, (2441), 9 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:35,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,000 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,000 INFO L175 Difference]: Start difference. First operand has 293 places, 273 transitions, 596 flow. Second operand 9 states and 2441 transitions. [2022-11-02 20:49:36,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 283 transitions, 672 flow [2022-11-02 20:49:36,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 283 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:36,006 INFO L231 Difference]: Finished difference. Result has 303 places, 279 transitions, 644 flow [2022-11-02 20:49:36,007 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=303, PETRI_TRANSITIONS=279} [2022-11-02 20:49:36,007 INFO L287 CegarLoopForPetriNet]: 302 programPoint places, 1 predicate places. [2022-11-02 20:49:36,007 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 279 transitions, 644 flow [2022-11-02 20:49:36,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:36,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:36,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:36,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 20:49:36,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776885, now seen corresponding path program 1 times [2022-11-02 20:49:36,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:36,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753464857] [2022-11-02 20:49:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:36,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753464857] [2022-11-02 20:49:36,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753464857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477031207] [2022-11-02 20:49:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:36,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:36,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:36,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:49:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:36,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:36,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:36,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477031207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:36,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:36,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052677967] [2022-11-02 20:49:36,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:36,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:36,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:36,750 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-11-02 20:49:36,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 279 transitions, 644 flow. Second operand has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:36,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-11-02 20:49:36,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:37,080 INFO L130 PetriNetUnfolder]: 0/352 cut-off events. [2022-11-02 20:49:37,080 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-02 20:49:37,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 822 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:49:37,082 INFO L137 encePairwiseOnDemand]: 331/337 looper letters, 26 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-11-02 20:49:37,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 303 transitions, 846 flow [2022-11-02 20:49:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5679 transitions. [2022-11-02 20:49:37,090 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8024586689275116 [2022-11-02 20:49:37,091 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5679 transitions. [2022-11-02 20:49:37,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5679 transitions. [2022-11-02 20:49:37,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:37,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5679 transitions. [2022-11-02 20:49:37,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.42857142857144) internal successors, (5679), 21 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,112 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,113 INFO L175 Difference]: Start difference. First operand has 303 places, 279 transitions, 644 flow. Second operand 21 states and 5679 transitions. [2022-11-02 20:49:37,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 303 transitions, 846 flow [2022-11-02 20:49:37,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 303 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:37,120 INFO L231 Difference]: Finished difference. Result has 327 places, 292 transitions, 768 flow [2022-11-02 20:49:37,120 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=768, PETRI_PLACES=327, PETRI_TRANSITIONS=292} [2022-11-02 20:49:37,121 INFO L287 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-11-02 20:49:37,121 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 292 transitions, 768 flow [2022-11-02 20:49:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:37,123 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:37,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:37,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1304864171, now seen corresponding path program 1 times [2022-11-02 20:49:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:37,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016190604] [2022-11-02 20:49:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:37,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:37,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016190604] [2022-11-02 20:49:37,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016190604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598706951] [2022-11-02 20:49:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:37,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:37,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:37,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:49:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:49:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:38,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:38,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598706951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:38,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:38,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:49:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536237641] [2022-11-02 20:49:38,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:38,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:49:38,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:49:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:49:38,482 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-11-02 20:49:38,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 292 transitions, 768 flow. Second operand has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:38,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:38,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-11-02 20:49:38,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:38,904 INFO L130 PetriNetUnfolder]: 0/326 cut-off events. [2022-11-02 20:49:38,904 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-02 20:49:38,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:49:38,906 INFO L137 encePairwiseOnDemand]: 332/337 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-11-02 20:49:38,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-11-02 20:49:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:49:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-02 20:49:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7290 transitions. [2022-11-02 20:49:38,915 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8011869436201781 [2022-11-02 20:49:38,916 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7290 transitions. [2022-11-02 20:49:38,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7290 transitions. [2022-11-02 20:49:38,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:38,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7290 transitions. [2022-11-02 20:49:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:38,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:38,942 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:38,942 INFO L175 Difference]: Start difference. First operand has 327 places, 292 transitions, 768 flow. Second operand 27 states and 7290 transitions. [2022-11-02 20:49:38,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-11-02 20:49:38,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-02 20:49:38,950 INFO L231 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-11-02 20:49:38,950 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-11-02 20:49:38,951 INFO L287 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-11-02 20:49:38,951 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-11-02 20:49:38,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:38,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:38,953 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:38,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:39,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:39,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1236984545, now seen corresponding path program 1 times [2022-11-02 20:49:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:39,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6152904] [2022-11-02 20:49:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:39,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:39,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:39,227 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:39,228 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-02 20:49:39,228 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:49:39,230 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:39,231 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-02 20:49:39,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:39,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 370 transitions, 857 flow [2022-11-02 20:49:39,456 INFO L130 PetriNetUnfolder]: 94/716 cut-off events. [2022-11-02 20:49:39,457 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-02 20:49:39,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 716 events. 94/716 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2544 event pairs, 0 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 687. Up to 20 conditions per place. [2022-11-02 20:49:39,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 370 transitions, 857 flow [2022-11-02 20:49:39,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 370 transitions, 857 flow [2022-11-02 20:49:39,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:39,491 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:39,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:39,498 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2022-11-02 20:49:39,499 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:39,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:39,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:39,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -503735289, now seen corresponding path program 1 times [2022-11-02 20:49:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:39,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451331744] [2022-11-02 20:49:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451331744] [2022-11-02 20:49:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451331744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:39,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:39,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845169086] [2022-11-02 20:49:39,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:39,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:39,532 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 370 [2022-11-02 20:49:39,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 370 transitions, 857 flow. Second operand has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:39,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:39,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 370 [2022-11-02 20:49:39,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:39,747 INFO L130 PetriNetUnfolder]: 0/587 cut-off events. [2022-11-02 20:49:39,748 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-02 20:49:39,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 587 events. 0/587 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2224 event pairs, 0 based on Foata normal form. 1312/1881 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-02 20:49:39,750 INFO L137 encePairwiseOnDemand]: 309/370 looper letters, 18 selfloop transitions, 2 changer transitions 12/315 dead transitions. [2022-11-02 20:49:39,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 315 transitions, 787 flow [2022-11-02 20:49:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 971 transitions. [2022-11-02 20:49:39,752 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8747747747747747 [2022-11-02 20:49:39,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 971 transitions. [2022-11-02 20:49:39,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 971 transitions. [2022-11-02 20:49:39,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:39,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 971 transitions. [2022-11-02 20:49:39,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.6666666666667) internal successors, (971), 3 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:39,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:39,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:39,757 INFO L175 Difference]: Start difference. First operand has 331 places, 370 transitions, 857 flow. Second operand 3 states and 971 transitions. [2022-11-02 20:49:39,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 315 transitions, 787 flow [2022-11-02 20:49:39,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 315 transitions, 715 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:39,763 INFO L231 Difference]: Finished difference. Result has 333 places, 300 transitions, 655 flow [2022-11-02 20:49:39,764 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=655, PETRI_PLACES=333, PETRI_TRANSITIONS=300} [2022-11-02 20:49:39,768 INFO L287 CegarLoopForPetriNet]: 331 programPoint places, 2 predicate places. [2022-11-02 20:49:39,769 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 300 transitions, 655 flow [2022-11-02 20:49:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:39,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:39,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:39,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-02 20:49:39,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1805231264, now seen corresponding path program 1 times [2022-11-02 20:49:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:39,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250094446] [2022-11-02 20:49:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:39,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:39,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250094446] [2022-11-02 20:49:39,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250094446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:39,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458903046] [2022-11-02 20:49:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:39,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:39,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:39,828 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:39,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:49:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:40,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:40,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458903046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:40,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:40,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:40,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589612735] [2022-11-02 20:49:40,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:40,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:40,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:40,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:40,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:40,092 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-11-02 20:49:40,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 300 transitions, 655 flow. Second operand has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 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) [2022-11-02 20:49:40,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:40,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-11-02 20:49:40,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:40,318 INFO L130 PetriNetUnfolder]: 0/453 cut-off events. [2022-11-02 20:49:40,318 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-02 20:49:40,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 453 events. 0/453 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1345 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:49:40,320 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 19 selfloop transitions, 9 changer transitions 0/310 dead transitions. [2022-11-02 20:49:40,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 310 transitions, 733 flow [2022-11-02 20:49:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2676 transitions. [2022-11-02 20:49:40,327 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8036036036036036 [2022-11-02 20:49:40,327 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2676 transitions. [2022-11-02 20:49:40,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2676 transitions. [2022-11-02 20:49:40,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:40,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2676 transitions. [2022-11-02 20:49:40,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 297.3333333333333) internal successors, (2676), 9 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:40,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:40,337 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:40,337 INFO L175 Difference]: Start difference. First operand has 333 places, 300 transitions, 655 flow. Second operand 9 states and 2676 transitions. [2022-11-02 20:49:40,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 310 transitions, 733 flow [2022-11-02 20:49:40,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 310 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:40,343 INFO L231 Difference]: Finished difference. Result has 331 places, 306 transitions, 703 flow [2022-11-02 20:49:40,344 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=331, PETRI_TRANSITIONS=306} [2022-11-02 20:49:40,346 INFO L287 CegarLoopForPetriNet]: 331 programPoint places, 0 predicate places. [2022-11-02 20:49:40,346 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 306 transitions, 703 flow [2022-11-02 20:49:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 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) [2022-11-02 20:49:40,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:40,347 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:40,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:40,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 20:49:40,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash 484043797, now seen corresponding path program 1 times [2022-11-02 20:49:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:40,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835961327] [2022-11-02 20:49:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:40,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:40,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835961327] [2022-11-02 20:49:40,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835961327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802610888] [2022-11-02 20:49:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:40,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:40,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:40,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:49:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:40,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:41,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802610888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:41,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:41,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752183502] [2022-11-02 20:49:41,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:41,111 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-11-02 20:49:41,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 306 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:41,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:41,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-11-02 20:49:41,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:41,487 INFO L130 PetriNetUnfolder]: 0/401 cut-off events. [2022-11-02 20:49:41,488 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-02 20:49:41,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 401 events. 0/401 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1005 event pairs, 0 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:49:41,489 INFO L137 encePairwiseOnDemand]: 364/370 looper letters, 27 selfloop transitions, 21 changer transitions 0/330 dead transitions. [2022-11-02 20:49:41,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 330 transitions, 907 flow [2022-11-02 20:49:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6226 transitions. [2022-11-02 20:49:41,497 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8012870012870013 [2022-11-02 20:49:41,497 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6226 transitions. [2022-11-02 20:49:41,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6226 transitions. [2022-11-02 20:49:41,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:41,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6226 transitions. [2022-11-02 20:49:41,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 296.4761904761905) internal successors, (6226), 21 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:41,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:41,558 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:41,558 INFO L175 Difference]: Start difference. First operand has 331 places, 306 transitions, 703 flow. Second operand 21 states and 6226 transitions. [2022-11-02 20:49:41,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 330 transitions, 907 flow [2022-11-02 20:49:41,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 330 transitions, 893 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:41,565 INFO L231 Difference]: Finished difference. Result has 355 places, 319 transitions, 827 flow [2022-11-02 20:49:41,565 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=827, PETRI_PLACES=355, PETRI_TRANSITIONS=319} [2022-11-02 20:49:41,567 INFO L287 CegarLoopForPetriNet]: 331 programPoint places, 24 predicate places. [2022-11-02 20:49:41,567 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 319 transitions, 827 flow [2022-11-02 20:49:41,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:41,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:41,568 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:41,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:41,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-02 20:49:41,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1803030795, now seen corresponding path program 1 times [2022-11-02 20:49:41,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:41,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511522709] [2022-11-02 20:49:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:41,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:42,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511522709] [2022-11-02 20:49:42,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511522709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087567734] [2022-11-02 20:49:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:42,080 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:42,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:49:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:49:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:42,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:42,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087567734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:42,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:42,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:49:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750753445] [2022-11-02 20:49:42,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:49:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:49:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:49:42,769 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-11-02 20:49:42,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 319 transitions, 827 flow. Second operand has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:42,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:42,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-11-02 20:49:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:43,280 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-02 20:49:43,280 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-02 20:49:43,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:49:43,282 INFO L137 encePairwiseOnDemand]: 365/370 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-11-02 20:49:43,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 328 transitions, 1017 flow [2022-11-02 20:49:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:49:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:49:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8881 transitions. [2022-11-02 20:49:43,296 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8000900900900901 [2022-11-02 20:49:43,296 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8881 transitions. [2022-11-02 20:49:43,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8881 transitions. [2022-11-02 20:49:43,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:43,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8881 transitions. [2022-11-02 20:49:43,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 296.03333333333336) internal successors, (8881), 30 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,336 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,337 INFO L175 Difference]: Start difference. First operand has 355 places, 319 transitions, 827 flow. Second operand 30 states and 8881 transitions. [2022-11-02 20:49:43,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 328 transitions, 1017 flow [2022-11-02 20:49:43,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-02 20:49:43,346 INFO L231 Difference]: Finished difference. Result has 358 places, 312 transitions, 834 flow [2022-11-02 20:49:43,347 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=358, PETRI_TRANSITIONS=312} [2022-11-02 20:49:43,348 INFO L287 CegarLoopForPetriNet]: 331 programPoint places, 27 predicate places. [2022-11-02 20:49:43,348 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 312 transitions, 834 flow [2022-11-02 20:49:43,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:43,351 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:43,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:43,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-02 20:49:43,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:43,575 INFO L85 PathProgramCache]: Analyzing trace with hash 226570656, now seen corresponding path program 1 times [2022-11-02 20:49:43,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:43,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534808564] [2022-11-02 20:49:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:43,613 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:43,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:43,647 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:43,647 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:43,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:43,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-02 20:49:43,648 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:49:43,648 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:43,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-02 20:49:43,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:43,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 403 transitions, 946 flow [2022-11-02 20:49:43,899 INFO L130 PetriNetUnfolder]: 104/788 cut-off events. [2022-11-02 20:49:43,899 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-02 20:49:43,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 788 events. 104/788 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2828 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 769. Up to 22 conditions per place. [2022-11-02 20:49:43,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 403 transitions, 946 flow [2022-11-02 20:49:43,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 403 transitions, 946 flow [2022-11-02 20:49:43,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:43,951 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:43,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:43,959 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2022-11-02 20:49:43,959 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:43,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:43,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:43,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1498309670, now seen corresponding path program 1 times [2022-11-02 20:49:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869156917] [2022-11-02 20:49:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:43,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869156917] [2022-11-02 20:49:43,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869156917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:43,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:43,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690033792] [2022-11-02 20:49:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:43,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:43,979 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 403 [2022-11-02 20:49:43,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 403 transitions, 946 flow. Second operand has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:43,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 403 [2022-11-02 20:49:43,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:44,221 INFO L130 PetriNetUnfolder]: 0/673 cut-off events. [2022-11-02 20:49:44,222 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-11-02 20:49:44,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 673 events. 0/673 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2590 event pairs, 0 based on Foata normal form. 322/973 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-02 20:49:44,224 INFO L137 encePairwiseOnDemand]: 339/403 looper letters, 10 selfloop transitions, 0 changer transitions 12/338 dead transitions. [2022-11-02 20:49:44,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 338 transitions, 836 flow [2022-11-02 20:49:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-11-02 20:49:44,226 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9057071960297767 [2022-11-02 20:49:44,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-11-02 20:49:44,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-11-02 20:49:44,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:44,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-11-02 20:49:44,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 365.0) internal successors, (730), 2 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,230 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,230 INFO L175 Difference]: Start difference. First operand has 360 places, 403 transitions, 946 flow. Second operand 2 states and 730 transitions. [2022-11-02 20:49:44,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 338 transitions, 836 flow [2022-11-02 20:49:44,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 338 transitions, 746 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:44,236 INFO L231 Difference]: Finished difference. Result has 360 places, 326 transitions, 702 flow [2022-11-02 20:49:44,237 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=702, PETRI_PLACES=360, PETRI_TRANSITIONS=326} [2022-11-02 20:49:44,237 INFO L287 CegarLoopForPetriNet]: 360 programPoint places, 0 predicate places. [2022-11-02 20:49:44,237 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 326 transitions, 702 flow [2022-11-02 20:49:44,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:44,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:44,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-02 20:49:44,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1204906663, now seen corresponding path program 1 times [2022-11-02 20:49:44,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:44,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766023702] [2022-11-02 20:49:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:44,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:44,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766023702] [2022-11-02 20:49:44,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766023702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:44,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:44,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:44,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924255738] [2022-11-02 20:49:44,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:44,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:44,271 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 403 [2022-11-02 20:49:44,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 326 transitions, 702 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:44,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 403 [2022-11-02 20:49:44,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:44,459 INFO L130 PetriNetUnfolder]: 0/528 cut-off events. [2022-11-02 20:49:44,459 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-02 20:49:44,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 528 events. 0/528 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1685 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-02 20:49:44,461 INFO L137 encePairwiseOnDemand]: 400/403 looper letters, 19 selfloop transitions, 2 changer transitions 0/330 dead transitions. [2022-11-02 20:49:44,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 330 transitions, 752 flow [2022-11-02 20:49:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-11-02 20:49:44,463 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8147229114971051 [2022-11-02 20:49:44,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-11-02 20:49:44,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-11-02 20:49:44,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:44,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-11-02 20:49:44,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,467 INFO L175 Difference]: Start difference. First operand has 360 places, 326 transitions, 702 flow. Second operand 3 states and 985 transitions. [2022-11-02 20:49:44,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 330 transitions, 752 flow [2022-11-02 20:49:44,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 330 transitions, 752 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:44,474 INFO L231 Difference]: Finished difference. Result has 351 places, 327 transitions, 714 flow [2022-11-02 20:49:44,475 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=351, PETRI_TRANSITIONS=327} [2022-11-02 20:49:44,475 INFO L287 CegarLoopForPetriNet]: 360 programPoint places, -9 predicate places. [2022-11-02 20:49:44,475 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 327 transitions, 714 flow [2022-11-02 20:49:44,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:44,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-02 20:49:44,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 144830272, now seen corresponding path program 1 times [2022-11-02 20:49:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:44,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573337334] [2022-11-02 20:49:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573337334] [2022-11-02 20:49:44,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573337334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551116306] [2022-11-02 20:49:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:44,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:44,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:44,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:49:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551116306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:44,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:44,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592817991] [2022-11-02 20:49:44,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:44,790 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-11-02 20:49:44,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 327 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:44,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:44,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-11-02 20:49:44,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:45,022 INFO L130 PetriNetUnfolder]: 0/502 cut-off events. [2022-11-02 20:49:45,022 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-02 20:49:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 502 events. 0/502 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1531 event pairs, 0 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:49:45,024 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 20 selfloop transitions, 9 changer transitions 0/337 dead transitions. [2022-11-02 20:49:45,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 337 transitions, 794 flow [2022-11-02 20:49:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2911 transitions. [2022-11-02 20:49:45,030 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8025916735594155 [2022-11-02 20:49:45,030 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2911 transitions. [2022-11-02 20:49:45,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2911 transitions. [2022-11-02 20:49:45,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:45,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2911 transitions. [2022-11-02 20:49:45,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.44444444444446) internal successors, (2911), 9 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,041 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,041 INFO L175 Difference]: Start difference. First operand has 351 places, 327 transitions, 714 flow. Second operand 9 states and 2911 transitions. [2022-11-02 20:49:45,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 337 transitions, 794 flow [2022-11-02 20:49:45,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 337 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:45,051 INFO L231 Difference]: Finished difference. Result has 361 places, 333 transitions, 762 flow [2022-11-02 20:49:45,052 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=361, PETRI_TRANSITIONS=333} [2022-11-02 20:49:45,052 INFO L287 CegarLoopForPetriNet]: 360 programPoint places, 1 predicate places. [2022-11-02 20:49:45,052 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 333 transitions, 762 flow [2022-11-02 20:49:45,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:45,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:45,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:45,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-02 20:49:45,278 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:45,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1371680437, now seen corresponding path program 1 times [2022-11-02 20:49:45,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:45,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146673052] [2022-11-02 20:49:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:45,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:45,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146673052] [2022-11-02 20:49:45,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146673052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496295537] [2022-11-02 20:49:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:45,430 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:45,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:49:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:45,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:45,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496295537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:45,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:45,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:45,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98804990] [2022-11-02 20:49:45,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:45,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:45,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:45,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:45,821 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-11-02 20:49:45,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 333 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:45,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-11-02 20:49:45,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:46,168 INFO L130 PetriNetUnfolder]: 0/450 cut-off events. [2022-11-02 20:49:46,168 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-02 20:49:46,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 450 events. 0/450 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1190 event pairs, 0 based on Foata normal form. 4/454 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:49:46,170 INFO L137 encePairwiseOnDemand]: 397/403 looper letters, 28 selfloop transitions, 21 changer transitions 0/357 dead transitions. [2022-11-02 20:49:46,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 357 transitions, 968 flow [2022-11-02 20:49:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6773 transitions. [2022-11-02 20:49:46,177 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8003072196620584 [2022-11-02 20:49:46,177 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6773 transitions. [2022-11-02 20:49:46,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6773 transitions. [2022-11-02 20:49:46,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:46,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6773 transitions. [2022-11-02 20:49:46,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 322.5238095238095) internal successors, (6773), 21 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,196 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,196 INFO L175 Difference]: Start difference. First operand has 361 places, 333 transitions, 762 flow. Second operand 21 states and 6773 transitions. [2022-11-02 20:49:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 357 transitions, 968 flow [2022-11-02 20:49:46,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 357 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:46,204 INFO L231 Difference]: Finished difference. Result has 385 places, 346 transitions, 886 flow [2022-11-02 20:49:46,204 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=886, PETRI_PLACES=385, PETRI_TRANSITIONS=346} [2022-11-02 20:49:46,205 INFO L287 CegarLoopForPetriNet]: 360 programPoint places, 25 predicate places. [2022-11-02 20:49:46,205 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 346 transitions, 886 flow [2022-11-02 20:49:46,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:46,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:46,207 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:46,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:46,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:46,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash -149142613, now seen corresponding path program 1 times [2022-11-02 20:49:46,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:46,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197593367] [2022-11-02 20:49:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:46,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:46,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:46,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197593367] [2022-11-02 20:49:46,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197593367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:46,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933846818] [2022-11-02 20:49:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:46,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:46,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:46,705 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:46,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:49:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:49:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:47,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:47,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933846818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:47,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:47,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:49:47,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013738571] [2022-11-02 20:49:47,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:47,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:49:47,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:49:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:49:47,462 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-11-02 20:49:47,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 346 transitions, 886 flow. Second operand has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:47,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:47,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-11-02 20:49:47,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:48,035 INFO L130 PetriNetUnfolder]: 0/398 cut-off events. [2022-11-02 20:49:48,036 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-02 20:49:48,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-02 20:49:48,038 INFO L137 encePairwiseOnDemand]: 398/403 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-11-02 20:49:48,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-11-02 20:49:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:49:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:49:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10628 transitions. [2022-11-02 20:49:48,050 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7991578314158959 [2022-11-02 20:49:48,050 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10628 transitions. [2022-11-02 20:49:48,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10628 transitions. [2022-11-02 20:49:48,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:48,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10628 transitions. [2022-11-02 20:49:48,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 322.06060606060606) internal successors, (10628), 33 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,079 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,079 INFO L175 Difference]: Start difference. First operand has 385 places, 346 transitions, 886 flow. Second operand 33 states and 10628 transitions. [2022-11-02 20:49:48,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-11-02 20:49:48,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-02 20:49:48,087 INFO L231 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-11-02 20:49:48,088 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-11-02 20:49:48,088 INFO L287 CegarLoopForPetriNet]: 360 programPoint places, 31 predicate places. [2022-11-02 20:49:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-11-02 20:49:48,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:48,091 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:48,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:48,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-02 20:49:48,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:48,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1786652926, now seen corresponding path program 1 times [2022-11-02 20:49:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:48,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180758717] [2022-11-02 20:49:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:48,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:48,335 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:48,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:48,366 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:48,366 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:48,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-02 20:49:48,367 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:49:48,367 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:48,367 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-02 20:49:48,405 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:48,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 436 transitions, 1037 flow [2022-11-02 20:49:48,644 INFO L130 PetriNetUnfolder]: 114/860 cut-off events. [2022-11-02 20:49:48,644 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-02 20:49:48,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 860 events. 114/860 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3107 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 852. Up to 24 conditions per place. [2022-11-02 20:49:48,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 436 transitions, 1037 flow [2022-11-02 20:49:48,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 436 transitions, 1037 flow [2022-11-02 20:49:48,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:48,675 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:48,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:48,685 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-02 20:49:48,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:48,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:48,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:48,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:48,687 INFO L85 PathProgramCache]: Analyzing trace with hash 650520998, now seen corresponding path program 1 times [2022-11-02 20:49:48,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:48,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598084718] [2022-11-02 20:49:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:48,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:48,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598084718] [2022-11-02 20:49:48,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598084718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:48,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:48,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:48,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048098856] [2022-11-02 20:49:48,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:48,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:48,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:48,710 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 436 [2022-11-02 20:49:48,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 436 transitions, 1037 flow. Second operand has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:48,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 436 [2022-11-02 20:49:48,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:48,962 INFO L130 PetriNetUnfolder]: 0/734 cut-off events. [2022-11-02 20:49:48,962 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-11-02 20:49:48,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 734 events. 0/734 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2914 event pairs, 0 based on Foata normal form. 386/1096 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-02 20:49:48,964 INFO L137 encePairwiseOnDemand]: 366/436 looper letters, 11 selfloop transitions, 0 changer transitions 12/365 dead transitions. [2022-11-02 20:49:48,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 365 transitions, 917 flow [2022-11-02 20:49:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-11-02 20:49:48,966 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9048165137614679 [2022-11-02 20:49:48,966 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-11-02 20:49:48,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-11-02 20:49:48,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:48,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-11-02 20:49:48,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 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) [2022-11-02 20:49:48,970 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 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) [2022-11-02 20:49:48,970 INFO L175 Difference]: Start difference. First operand has 389 places, 436 transitions, 1037 flow. Second operand 2 states and 789 transitions. [2022-11-02 20:49:48,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 365 transitions, 917 flow [2022-11-02 20:49:48,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 365 transitions, 807 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:48,978 INFO L231 Difference]: Finished difference. Result has 389 places, 353 transitions, 761 flow [2022-11-02 20:49:48,979 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=761, PETRI_PLACES=389, PETRI_TRANSITIONS=353} [2022-11-02 20:49:48,980 INFO L287 CegarLoopForPetriNet]: 389 programPoint places, 0 predicate places. [2022-11-02 20:49:48,980 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 353 transitions, 761 flow [2022-11-02 20:49:48,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:48,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:48,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-02 20:49:48,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash 357117991, now seen corresponding path program 1 times [2022-11-02 20:49:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712195943] [2022-11-02 20:49:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:48,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:49,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712195943] [2022-11-02 20:49:49,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712195943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:49,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:49,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469656254] [2022-11-02 20:49:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:49,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:49,024 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 436 [2022-11-02 20:49:49,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 353 transitions, 761 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:49,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 436 [2022-11-02 20:49:49,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:49,237 INFO L130 PetriNetUnfolder]: 0/577 cut-off events. [2022-11-02 20:49:49,237 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-02 20:49:49,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 577 events. 0/577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1868 event pairs, 0 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-02 20:49:49,239 INFO L137 encePairwiseOnDemand]: 433/436 looper letters, 20 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-11-02 20:49:49,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 357 transitions, 813 flow [2022-11-02 20:49:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-11-02 20:49:49,241 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8134556574923547 [2022-11-02 20:49:49,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-11-02 20:49:49,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-11-02 20:49:49,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:49,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-11-02 20:49:49,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,245 INFO L175 Difference]: Start difference. First operand has 389 places, 353 transitions, 761 flow. Second operand 3 states and 1064 transitions. [2022-11-02 20:49:49,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 357 transitions, 813 flow [2022-11-02 20:49:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 357 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:49,254 INFO L231 Difference]: Finished difference. Result has 380 places, 354 transitions, 773 flow [2022-11-02 20:49:49,255 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=380, PETRI_TRANSITIONS=354} [2022-11-02 20:49:49,256 INFO L287 CegarLoopForPetriNet]: 389 programPoint places, -9 predicate places. [2022-11-02 20:49:49,256 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 354 transitions, 773 flow [2022-11-02 20:49:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:49,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:49,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-02 20:49:49,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1754914144, now seen corresponding path program 1 times [2022-11-02 20:49:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540371566] [2022-11-02 20:49:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:49,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540371566] [2022-11-02 20:49:49,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540371566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:49,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535963733] [2022-11-02 20:49:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:49,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:49,309 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:49,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:49:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:49,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:49,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:49,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535963733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:49,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:49,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:49,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201749603] [2022-11-02 20:49:49,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:49,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:49,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:49,592 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-11-02 20:49:49,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 354 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:49,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-11-02 20:49:49,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:49,875 INFO L130 PetriNetUnfolder]: 0/551 cut-off events. [2022-11-02 20:49:49,875 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-02 20:49:49,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 551 events. 0/551 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1715 event pairs, 0 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-02 20:49:49,876 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 21 selfloop transitions, 9 changer transitions 0/364 dead transitions. [2022-11-02 20:49:49,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 364 transitions, 855 flow [2022-11-02 20:49:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3146 transitions. [2022-11-02 20:49:49,880 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8017329255861366 [2022-11-02 20:49:49,880 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3146 transitions. [2022-11-02 20:49:49,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3146 transitions. [2022-11-02 20:49:49,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:49,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3146 transitions. [2022-11-02 20:49:49,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 349.55555555555554) internal successors, (3146), 9 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,888 INFO L175 Difference]: Start difference. First operand has 380 places, 354 transitions, 773 flow. Second operand 9 states and 3146 transitions. [2022-11-02 20:49:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 364 transitions, 855 flow [2022-11-02 20:49:49,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 364 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:49,896 INFO L231 Difference]: Finished difference. Result has 390 places, 360 transitions, 821 flow [2022-11-02 20:49:49,896 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=390, PETRI_TRANSITIONS=360} [2022-11-02 20:49:49,897 INFO L287 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2022-11-02 20:49:49,897 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 360 transitions, 821 flow [2022-11-02 20:49:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:49,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:49,898 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:49,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-02 20:49:50,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 126719509, now seen corresponding path program 1 times [2022-11-02 20:49:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555500912] [2022-11-02 20:49:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:50,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555500912] [2022-11-02 20:49:50,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555500912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939114515] [2022-11-02 20:49:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:50,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:50,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:50,260 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:50,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:49:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:50,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:50,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939114515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:50,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:50,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084075529] [2022-11-02 20:49:50,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:50,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:50,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:50,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:50,671 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-11-02 20:49:50,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 360 transitions, 821 flow. Second operand has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:50,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:50,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-11-02 20:49:50,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:51,060 INFO L130 PetriNetUnfolder]: 0/499 cut-off events. [2022-11-02 20:49:51,060 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-02 20:49:51,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 499 events. 0/499 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1374 event pairs, 0 based on Foata normal form. 4/503 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:49:51,062 INFO L137 encePairwiseOnDemand]: 430/436 looper letters, 29 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2022-11-02 20:49:51,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 384 transitions, 1029 flow [2022-11-02 20:49:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7320 transitions. [2022-11-02 20:49:51,070 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.799475753604194 [2022-11-02 20:49:51,070 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7320 transitions. [2022-11-02 20:49:51,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7320 transitions. [2022-11-02 20:49:51,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:51,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7320 transitions. [2022-11-02 20:49:51,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 348.57142857142856) internal successors, (7320), 21 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,089 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,089 INFO L175 Difference]: Start difference. First operand has 390 places, 360 transitions, 821 flow. Second operand 21 states and 7320 transitions. [2022-11-02 20:49:51,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 384 transitions, 1029 flow [2022-11-02 20:49:51,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 384 transitions, 1015 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:51,098 INFO L231 Difference]: Finished difference. Result has 414 places, 373 transitions, 945 flow [2022-11-02 20:49:51,098 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=945, PETRI_PLACES=414, PETRI_TRANSITIONS=373} [2022-11-02 20:49:51,099 INFO L287 CegarLoopForPetriNet]: 389 programPoint places, 25 predicate places. [2022-11-02 20:49:51,099 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 373 transitions, 945 flow [2022-11-02 20:49:51,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:51,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:51,100 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:51,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:51,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash -256688757, now seen corresponding path program 1 times [2022-11-02 20:49:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:51,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700490449] [2022-11-02 20:49:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:51,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:51,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700490449] [2022-11-02 20:49:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700490449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423109311] [2022-11-02 20:49:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:51,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:51,614 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:51,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:49:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:49:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:51,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:52,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423109311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:52,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:52,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:49:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271017465] [2022-11-02 20:49:52,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:49:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:49:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:49:52,343 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-11-02 20:49:52,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 373 transitions, 945 flow. Second operand has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:52,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-11-02 20:49:52,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:52,947 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-02 20:49:52,947 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-02 20:49:52,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:49:52,948 INFO L137 encePairwiseOnDemand]: 431/436 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-11-02 20:49:52,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-11-02 20:49:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:49:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-02 20:49:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12531 transitions. [2022-11-02 20:49:52,959 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7983562691131498 [2022-11-02 20:49:52,959 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12531 transitions. [2022-11-02 20:49:52,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12531 transitions. [2022-11-02 20:49:52,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:52,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12531 transitions. [2022-11-02 20:49:52,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 348.0833333333333) internal successors, (12531), 36 states have internal predecessors, (12531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,990 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:52,990 INFO L175 Difference]: Start difference. First operand has 414 places, 373 transitions, 945 flow. Second operand 36 states and 12531 transitions. [2022-11-02 20:49:52,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-11-02 20:49:52,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-02 20:49:52,999 INFO L231 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-11-02 20:49:53,000 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-11-02 20:49:53,000 INFO L287 CegarLoopForPetriNet]: 389 programPoint places, 34 predicate places. [2022-11-02 20:49:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-11-02 20:49:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:53,003 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:53,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:53,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:53,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1101802981, now seen corresponding path program 1 times [2022-11-02 20:49:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:53,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407046318] [2022-11-02 20:49:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:53,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:53,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:53,280 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:53,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:53,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-02 20:49:53,280 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:49:53,281 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:53,281 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-11-02 20:49:53,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:53,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 469 transitions, 1130 flow [2022-11-02 20:49:53,600 INFO L130 PetriNetUnfolder]: 124/932 cut-off events. [2022-11-02 20:49:53,600 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-02 20:49:53,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 932 events. 124/932 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3449 event pairs, 0 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 936. Up to 26 conditions per place. [2022-11-02 20:49:53,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 469 transitions, 1130 flow [2022-11-02 20:49:53,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 469 transitions, 1130 flow [2022-11-02 20:49:53,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:53,653 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:53,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:53,659 INFO L130 PetriNetUnfolder]: 4/92 cut-off events. [2022-11-02 20:49:53,660 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:53,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:53,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:53,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:53,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1541268998, now seen corresponding path program 1 times [2022-11-02 20:49:53,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:53,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945446244] [2022-11-02 20:49:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:53,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945446244] [2022-11-02 20:49:53,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945446244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:53,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:53,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143654366] [2022-11-02 20:49:53,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:53,677 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 380 out of 469 [2022-11-02 20:49:53,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 469 transitions, 1130 flow. Second operand has 2 states, 2 states have (on average 380.5) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:53,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 380 of 469 [2022-11-02 20:49:53,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:53,946 INFO L130 PetriNetUnfolder]: 0/795 cut-off events. [2022-11-02 20:49:53,946 INFO L131 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-11-02 20:49:53,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 795 events. 0/795 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3126 event pairs, 0 based on Foata normal form. 456/1225 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-02 20:49:53,948 INFO L137 encePairwiseOnDemand]: 393/469 looper letters, 12 selfloop transitions, 0 changer transitions 12/392 dead transitions. [2022-11-02 20:49:53,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 392 transitions, 1000 flow [2022-11-02 20:49:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 848 transitions. [2022-11-02 20:49:53,950 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9040511727078892 [2022-11-02 20:49:53,950 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 848 transitions. [2022-11-02 20:49:53,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 848 transitions. [2022-11-02 20:49:53,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:53,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 848 transitions. [2022-11-02 20:49:53,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 424.0) internal successors, (848), 2 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,953 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,953 INFO L175 Difference]: Start difference. First operand has 418 places, 469 transitions, 1130 flow. Second operand 2 states and 848 transitions. [2022-11-02 20:49:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 392 transitions, 1000 flow [2022-11-02 20:49:53,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 392 transitions, 868 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:53,962 INFO L231 Difference]: Finished difference. Result has 418 places, 380 transitions, 820 flow [2022-11-02 20:49:53,962 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=820, PETRI_PLACES=418, PETRI_TRANSITIONS=380} [2022-11-02 20:49:53,963 INFO L287 CegarLoopForPetriNet]: 418 programPoint places, 0 predicate places. [2022-11-02 20:49:53,963 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 380 transitions, 820 flow [2022-11-02 20:49:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 380.5) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:53,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:53,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-02 20:49:53,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1247865991, now seen corresponding path program 1 times [2022-11-02 20:49:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145767116] [2022-11-02 20:49:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145767116] [2022-11-02 20:49:53,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145767116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:53,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:53,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355900053] [2022-11-02 20:49:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:53,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:53,993 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 469 [2022-11-02 20:49:53,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 380 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:53,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:53,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 469 [2022-11-02 20:49:53,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:54,329 INFO L130 PetriNetUnfolder]: 0/626 cut-off events. [2022-11-02 20:49:54,329 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-02 20:49:54,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 626 events. 0/626 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2056 event pairs, 0 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-02 20:49:54,331 INFO L137 encePairwiseOnDemand]: 466/469 looper letters, 21 selfloop transitions, 2 changer transitions 0/384 dead transitions. [2022-11-02 20:49:54,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 384 transitions, 874 flow [2022-11-02 20:49:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1143 transitions. [2022-11-02 20:49:54,334 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8123667377398721 [2022-11-02 20:49:54,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1143 transitions. [2022-11-02 20:49:54,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1143 transitions. [2022-11-02 20:49:54,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:54,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1143 transitions. [2022-11-02 20:49:54,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,341 INFO L175 Difference]: Start difference. First operand has 418 places, 380 transitions, 820 flow. Second operand 3 states and 1143 transitions. [2022-11-02 20:49:54,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 384 transitions, 874 flow [2022-11-02 20:49:54,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 384 transitions, 874 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:54,350 INFO L231 Difference]: Finished difference. Result has 409 places, 381 transitions, 832 flow [2022-11-02 20:49:54,351 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=409, PETRI_TRANSITIONS=381} [2022-11-02 20:49:54,352 INFO L287 CegarLoopForPetriNet]: 418 programPoint places, -9 predicate places. [2022-11-02 20:49:54,352 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 381 transitions, 832 flow [2022-11-02 20:49:54,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:54,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:54,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-02 20:49:54,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1954451712, now seen corresponding path program 1 times [2022-11-02 20:49:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:54,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247314021] [2022-11-02 20:49:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:54,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:54,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:54,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247314021] [2022-11-02 20:49:54,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247314021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:54,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524246007] [2022-11-02 20:49:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:54,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:54,417 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:54,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:49:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:54,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524246007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:54,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:54,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:49:54,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677252635] [2022-11-02 20:49:54,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:54,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:49:54,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:49:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:49:54,735 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-11-02 20:49:54,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 381 transitions, 832 flow. Second operand has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:54,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:54,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-11-02 20:49:54,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:55,028 INFO L130 PetriNetUnfolder]: 0/600 cut-off events. [2022-11-02 20:49:55,028 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-02 20:49:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 600 events. 0/600 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-02 20:49:55,030 INFO L137 encePairwiseOnDemand]: 463/469 looper letters, 22 selfloop transitions, 9 changer transitions 0/391 dead transitions. [2022-11-02 20:49:55,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 391 transitions, 916 flow [2022-11-02 20:49:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:49:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:49:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3381 transitions. [2022-11-02 20:49:55,034 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8009950248756219 [2022-11-02 20:49:55,034 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3381 transitions. [2022-11-02 20:49:55,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3381 transitions. [2022-11-02 20:49:55,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:55,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3381 transitions. [2022-11-02 20:49:55,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 375.6666666666667) internal successors, (3381), 9 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,044 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,044 INFO L175 Difference]: Start difference. First operand has 409 places, 381 transitions, 832 flow. Second operand 9 states and 3381 transitions. [2022-11-02 20:49:55,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 391 transitions, 916 flow [2022-11-02 20:49:55,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 391 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:55,053 INFO L231 Difference]: Finished difference. Result has 419 places, 387 transitions, 880 flow [2022-11-02 20:49:55,053 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=419, PETRI_TRANSITIONS=387} [2022-11-02 20:49:55,054 INFO L287 CegarLoopForPetriNet]: 418 programPoint places, 1 predicate places. [2022-11-02 20:49:55,054 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 387 transitions, 880 flow [2022-11-02 20:49:55,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:55,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:55,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-02 20:49:55,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-02 20:49:55,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1044128309, now seen corresponding path program 1 times [2022-11-02 20:49:55,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:55,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944309992] [2022-11-02 20:49:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:55,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:55,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944309992] [2022-11-02 20:49:55,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944309992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:55,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744975120] [2022-11-02 20:49:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:55,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:55,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:55,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:55,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:49:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:49:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:55,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:55,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744975120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:55,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:55,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:49:55,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176802327] [2022-11-02 20:49:55,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:55,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:49:55,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:49:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:49:55,813 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-11-02 20:49:55,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 387 transitions, 880 flow. Second operand has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:55,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-11-02 20:49:55,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:56,312 INFO L130 PetriNetUnfolder]: 0/548 cut-off events. [2022-11-02 20:49:56,312 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-02 20:49:56,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 548 events. 0/548 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1559 event pairs, 0 based on Foata normal form. 4/552 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:49:56,314 INFO L137 encePairwiseOnDemand]: 463/469 looper letters, 30 selfloop transitions, 21 changer transitions 0/411 dead transitions. [2022-11-02 20:49:56,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 411 transitions, 1090 flow [2022-11-02 20:49:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:49:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:49:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7867 transitions. [2022-11-02 20:49:56,321 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7987612955630014 [2022-11-02 20:49:56,322 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7867 transitions. [2022-11-02 20:49:56,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7867 transitions. [2022-11-02 20:49:56,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:56,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7867 transitions. [2022-11-02 20:49:56,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 374.6190476190476) internal successors, (7867), 21 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,342 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,343 INFO L175 Difference]: Start difference. First operand has 419 places, 387 transitions, 880 flow. Second operand 21 states and 7867 transitions. [2022-11-02 20:49:56,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 411 transitions, 1090 flow [2022-11-02 20:49:56,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 411 transitions, 1076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:49:56,351 INFO L231 Difference]: Finished difference. Result has 443 places, 400 transitions, 1004 flow [2022-11-02 20:49:56,351 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1004, PETRI_PLACES=443, PETRI_TRANSITIONS=400} [2022-11-02 20:49:56,352 INFO L287 CegarLoopForPetriNet]: 418 programPoint places, 25 predicate places. [2022-11-02 20:49:56,352 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 400 transitions, 1004 flow [2022-11-02 20:49:56,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:56,354 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:56,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:56,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-02 20:49:56,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:56,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:56,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1480392363, now seen corresponding path program 1 times [2022-11-02 20:49:56,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:56,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87844628] [2022-11-02 20:49:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:56,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:56,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:56,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87844628] [2022-11-02 20:49:56,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87844628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:56,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8223334] [2022-11-02 20:49:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:56,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:56,851 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:56,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:49:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:49:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:57,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:57,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8223334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:57,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:57,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:49:57,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756478898] [2022-11-02 20:49:57,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:57,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:49:57,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:57,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:49:57,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:49:57,604 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-11-02 20:49:57,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 400 transitions, 1004 flow. Second operand has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:57,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:57,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-11-02 20:49:57,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:58,334 INFO L130 PetriNetUnfolder]: 0/470 cut-off events. [2022-11-02 20:49:58,334 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-11-02 20:49:58,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-11-02 20:49:58,336 INFO L137 encePairwiseOnDemand]: 464/469 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-11-02 20:49:58,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-11-02 20:49:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:49:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-02 20:49:58,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14590 transitions. [2022-11-02 20:49:58,344 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7976600513913946 [2022-11-02 20:49:58,344 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14590 transitions. [2022-11-02 20:49:58,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14590 transitions. [2022-11-02 20:49:58,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:58,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14590 transitions. [2022-11-02 20:49:58,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 374.1025641025641) internal successors, (14590), 39 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,420 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,421 INFO L175 Difference]: Start difference. First operand has 443 places, 400 transitions, 1004 flow. Second operand 39 states and 14590 transitions. [2022-11-02 20:49:58,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-11-02 20:49:58,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-02 20:49:58,430 INFO L231 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-11-02 20:49:58,431 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=455, PETRI_TRANSITIONS=402} [2022-11-02 20:49:58,431 INFO L287 CegarLoopForPetriNet]: 418 programPoint places, 37 predicate places. [2022-11-02 20:49:58,431 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-11-02 20:49:58,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:58,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:58,433 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:58,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-02 20:49:58,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 176240361, now seen corresponding path program 1 times [2022-11-02 20:49:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801183829] [2022-11-02 20:49:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:58,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:49:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:49:58,719 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:49:58,719 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:49:58,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:49:58,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:49:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-11-02 20:49:58,720 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:49:58,720 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:49:58,720 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-11-02 20:49:58,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:49:58,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 447 places, 502 transitions, 1225 flow [2022-11-02 20:49:59,110 INFO L130 PetriNetUnfolder]: 134/1004 cut-off events. [2022-11-02 20:49:59,111 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-11-02 20:49:59,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1004 events. 134/1004 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3718 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1021. Up to 28 conditions per place. [2022-11-02 20:49:59,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 502 transitions, 1225 flow [2022-11-02 20:49:59,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 502 transitions, 1225 flow [2022-11-02 20:49:59,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:59,164 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:59,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:49:59,171 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2022-11-02 20:49:59,172 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:49:59,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:59,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:59,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -124413626, now seen corresponding path program 1 times [2022-11-02 20:49:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:59,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322034581] [2022-11-02 20:49:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:59,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:59,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322034581] [2022-11-02 20:49:59,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322034581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:59,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251625970] [2022-11-02 20:49:59,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:59,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:59,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:59,191 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 406 out of 502 [2022-11-02 20:49:59,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 502 transitions, 1225 flow. Second operand has 2 states, 2 states have (on average 406.5) internal successors, (813), 2 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:59,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 406 of 502 [2022-11-02 20:49:59,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:59,536 INFO L130 PetriNetUnfolder]: 0/856 cut-off events. [2022-11-02 20:49:59,536 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2022-11-02 20:49:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 856 events. 0/856 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3424 event pairs, 0 based on Foata normal form. 532/1360 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2022-11-02 20:49:59,539 INFO L137 encePairwiseOnDemand]: 420/502 looper letters, 13 selfloop transitions, 0 changer transitions 12/419 dead transitions. [2022-11-02 20:49:59,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 419 transitions, 1085 flow [2022-11-02 20:49:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 907 transitions. [2022-11-02 20:49:59,544 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9033864541832669 [2022-11-02 20:49:59,544 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 907 transitions. [2022-11-02 20:49:59,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 907 transitions. [2022-11-02 20:49:59,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:59,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 907 transitions. [2022-11-02 20:49:59,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 453.5) internal successors, (907), 2 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,547 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 502.0) internal successors, (1506), 3 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,547 INFO L175 Difference]: Start difference. First operand has 447 places, 502 transitions, 1225 flow. Second operand 2 states and 907 transitions. [2022-11-02 20:49:59,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 419 transitions, 1085 flow [2022-11-02 20:49:59,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 419 transitions, 929 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:59,557 INFO L231 Difference]: Finished difference. Result has 447 places, 407 transitions, 879 flow [2022-11-02 20:49:59,557 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=879, PETRI_PLACES=447, PETRI_TRANSITIONS=407} [2022-11-02 20:49:59,558 INFO L287 CegarLoopForPetriNet]: 447 programPoint places, 0 predicate places. [2022-11-02 20:49:59,558 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 407 transitions, 879 flow [2022-11-02 20:49:59,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 406.5) internal successors, (813), 2 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:59,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:59,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-11-02 20:49:59,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash -417816633, now seen corresponding path program 1 times [2022-11-02 20:49:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:59,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974603779] [2022-11-02 20:49:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:59,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974603779] [2022-11-02 20:49:59,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974603779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:59,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:59,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:59,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963195647] [2022-11-02 20:49:59,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:59,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:59,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:59,628 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 502 [2022-11-02 20:49:59,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 407 transitions, 879 flow. Second operand has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:59,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 502 [2022-11-02 20:49:59,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:59,898 INFO L130 PetriNetUnfolder]: 0/675 cut-off events. [2022-11-02 20:49:59,898 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-02 20:49:59,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 675 events. 0/675 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2234 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-02 20:49:59,900 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 22 selfloop transitions, 2 changer transitions 0/411 dead transitions. [2022-11-02 20:49:59,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 411 transitions, 935 flow [2022-11-02 20:49:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:49:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1222 transitions. [2022-11-02 20:49:59,901 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8114209827357237 [2022-11-02 20:49:59,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1222 transitions. [2022-11-02 20:49:59,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1222 transitions. [2022-11-02 20:49:59,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:59,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1222 transitions. [2022-11-02 20:49:59,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.3333333333333) internal successors, (1222), 3 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,905 INFO L175 Difference]: Start difference. First operand has 447 places, 407 transitions, 879 flow. Second operand 3 states and 1222 transitions. [2022-11-02 20:49:59,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 411 transitions, 935 flow [2022-11-02 20:49:59,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 411 transitions, 935 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:59,914 INFO L231 Difference]: Finished difference. Result has 438 places, 408 transitions, 891 flow [2022-11-02 20:49:59,914 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=891, PETRI_PLACES=438, PETRI_TRANSITIONS=408} [2022-11-02 20:49:59,915 INFO L287 CegarLoopForPetriNet]: 447 programPoint places, -9 predicate places. [2022-11-02 20:49:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 408 transitions, 891 flow [2022-11-02 20:49:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:59,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:59,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-02 20:49:59,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:49:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1901634592, now seen corresponding path program 1 times [2022-11-02 20:49:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512633978] [2022-11-02 20:49:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:59,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512633978] [2022-11-02 20:49:59,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512633978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:59,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486625232] [2022-11-02 20:49:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:59,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:59,964 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:59,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:50:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486625232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:00,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:00,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848717912] [2022-11-02 20:50:00,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:00,295 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-11-02 20:50:00,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 408 transitions, 891 flow. Second operand has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:00,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-11-02 20:50:00,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:00,635 INFO L130 PetriNetUnfolder]: 0/649 cut-off events. [2022-11-02 20:50:00,635 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-02 20:50:00,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 649 events. 0/649 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2085 event pairs, 0 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-02 20:50:00,637 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 23 selfloop transitions, 9 changer transitions 0/418 dead transitions. [2022-11-02 20:50:00,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 418 transitions, 977 flow [2022-11-02 20:50:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3616 transitions. [2022-11-02 20:50:00,640 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8003541389995573 [2022-11-02 20:50:00,640 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3616 transitions. [2022-11-02 20:50:00,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3616 transitions. [2022-11-02 20:50:00,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:00,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3616 transitions. [2022-11-02 20:50:00,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 401.77777777777777) internal successors, (3616), 9 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,646 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,646 INFO L175 Difference]: Start difference. First operand has 438 places, 408 transitions, 891 flow. Second operand 9 states and 3616 transitions. [2022-11-02 20:50:00,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 418 transitions, 977 flow [2022-11-02 20:50:00,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 418 transitions, 975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:00,655 INFO L231 Difference]: Finished difference. Result has 448 places, 414 transitions, 939 flow [2022-11-02 20:50:00,656 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=939, PETRI_PLACES=448, PETRI_TRANSITIONS=414} [2022-11-02 20:50:00,656 INFO L287 CegarLoopForPetriNet]: 447 programPoint places, 1 predicate places. [2022-11-02 20:50:00,656 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 414 transitions, 939 flow [2022-11-02 20:50:00,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:00,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:00,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:00,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-11-02 20:50:00,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash -171060459, now seen corresponding path program 1 times [2022-11-02 20:50:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:00,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706340119] [2022-11-02 20:50:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:00,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706340119] [2022-11-02 20:50:00,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706340119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:00,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702960330] [2022-11-02 20:50:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:00,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:00,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:00,992 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:01,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:50:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:01,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:01,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702960330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:01,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:01,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584210856] [2022-11-02 20:50:01,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:01,450 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-11-02 20:50:01,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 414 transitions, 939 flow. Second operand has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:01,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:01,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-11-02 20:50:01,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:02,057 INFO L130 PetriNetUnfolder]: 0/597 cut-off events. [2022-11-02 20:50:02,057 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-02 20:50:02,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 597 events. 0/597 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1737 event pairs, 0 based on Foata normal form. 4/601 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:50:02,058 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 31 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2022-11-02 20:50:02,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 438 transitions, 1151 flow [2022-11-02 20:50:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8414 transitions. [2022-11-02 20:50:02,066 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.798140770252324 [2022-11-02 20:50:02,067 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8414 transitions. [2022-11-02 20:50:02,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8414 transitions. [2022-11-02 20:50:02,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:02,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8414 transitions. [2022-11-02 20:50:02,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 400.6666666666667) internal successors, (8414), 21 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,080 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,081 INFO L175 Difference]: Start difference. First operand has 448 places, 414 transitions, 939 flow. Second operand 21 states and 8414 transitions. [2022-11-02 20:50:02,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 438 transitions, 1151 flow [2022-11-02 20:50:02,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 438 transitions, 1137 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:02,092 INFO L231 Difference]: Finished difference. Result has 472 places, 427 transitions, 1063 flow [2022-11-02 20:50:02,093 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1063, PETRI_PLACES=472, PETRI_TRANSITIONS=427} [2022-11-02 20:50:02,093 INFO L287 CegarLoopForPetriNet]: 447 programPoint places, 25 predicate places. [2022-11-02 20:50:02,094 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 427 transitions, 1063 flow [2022-11-02 20:50:02,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:02,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:02,096 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:02,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:02,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:02,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:02,311 INFO L85 PathProgramCache]: Analyzing trace with hash 767133451, now seen corresponding path program 1 times [2022-11-02 20:50:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:02,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387758232] [2022-11-02 20:50:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387758232] [2022-11-02 20:50:02,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387758232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366987263] [2022-11-02 20:50:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:02,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:02,578 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:02,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:50:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:03,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:03,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366987263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:03,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:03,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:03,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866042209] [2022-11-02 20:50:03,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:03,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:03,374 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-11-02 20:50:03,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 427 transitions, 1063 flow. Second operand has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:03,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:03,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-11-02 20:50:03,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:04,233 INFO L130 PetriNetUnfolder]: 0/506 cut-off events. [2022-11-02 20:50:04,234 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-02 20:50:04,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:50:04,235 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-11-02 20:50:04,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 456 transitions, 1437 flow [2022-11-02 20:50:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:50:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-02 20:50:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16805 transitions. [2022-11-02 20:50:04,245 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7970498956554734 [2022-11-02 20:50:04,245 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16805 transitions. [2022-11-02 20:50:04,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16805 transitions. [2022-11-02 20:50:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16805 transitions. [2022-11-02 20:50:04,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 400.1190476190476) internal successors, (16805), 42 states have internal predecessors, (16805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:04,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:04,273 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:04,274 INFO L175 Difference]: Start difference. First operand has 472 places, 427 transitions, 1063 flow. Second operand 42 states and 16805 transitions. [2022-11-02 20:50:04,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 456 transitions, 1437 flow [2022-11-02 20:50:04,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-11-02 20:50:04,282 INFO L231 Difference]: Finished difference. Result has 487 places, 432 transitions, 1166 flow [2022-11-02 20:50:04,282 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=487, PETRI_TRANSITIONS=432} [2022-11-02 20:50:04,283 INFO L287 CegarLoopForPetriNet]: 447 programPoint places, 40 predicate places. [2022-11-02 20:50:04,283 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 432 transitions, 1166 flow [2022-11-02 20:50:04,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:04,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:04,286 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:04,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:04,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:04,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1834102098, now seen corresponding path program 1 times [2022-11-02 20:50:04,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:04,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82629799] [2022-11-02 20:50:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:04,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:04,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:04,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:04,586 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:04,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:50:04,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:50:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-11-02 20:50:04,587 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:50:04,588 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:04,588 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-11-02 20:50:04,645 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:04,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 476 places, 535 transitions, 1322 flow [2022-11-02 20:50:05,002 INFO L130 PetriNetUnfolder]: 144/1076 cut-off events. [2022-11-02 20:50:05,002 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-02 20:50:05,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 144/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4001 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 1107. Up to 30 conditions per place. [2022-11-02 20:50:05,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 535 transitions, 1322 flow [2022-11-02 20:50:05,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 476 places, 535 transitions, 1322 flow [2022-11-02 20:50:05,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:05,062 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:05,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:50:05,067 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-02 20:50:05,067 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:05,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:05,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:05,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash -51559578, now seen corresponding path program 1 times [2022-11-02 20:50:05,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173977382] [2022-11-02 20:50:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:05,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:05,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:05,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173977382] [2022-11-02 20:50:05,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173977382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:05,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:05,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510321011] [2022-11-02 20:50:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:05,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:50:05,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:50:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:05,085 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 535 [2022-11-02 20:50:05,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 535 transitions, 1322 flow. Second operand has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:05,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 535 [2022-11-02 20:50:05,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:05,493 INFO L130 PetriNetUnfolder]: 0/917 cut-off events. [2022-11-02 20:50:05,493 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-02 20:50:05,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 917 events. 0/917 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3665 event pairs, 0 based on Foata normal form. 614/1501 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-02 20:50:05,496 INFO L137 encePairwiseOnDemand]: 447/535 looper letters, 14 selfloop transitions, 0 changer transitions 12/446 dead transitions. [2022-11-02 20:50:05,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 446 transitions, 1172 flow [2022-11-02 20:50:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:50:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:50:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 966 transitions. [2022-11-02 20:50:05,498 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.902803738317757 [2022-11-02 20:50:05,498 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 966 transitions. [2022-11-02 20:50:05,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 966 transitions. [2022-11-02 20:50:05,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:05,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 966 transitions. [2022-11-02 20:50:05,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 483.0) internal successors, (966), 2 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,501 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,502 INFO L175 Difference]: Start difference. First operand has 476 places, 535 transitions, 1322 flow. Second operand 2 states and 966 transitions. [2022-11-02 20:50:05,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 446 transitions, 1172 flow [2022-11-02 20:50:05,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 446 transitions, 990 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:05,511 INFO L231 Difference]: Finished difference. Result has 476 places, 434 transitions, 938 flow [2022-11-02 20:50:05,512 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=938, PETRI_PLACES=476, PETRI_TRANSITIONS=434} [2022-11-02 20:50:05,512 INFO L287 CegarLoopForPetriNet]: 476 programPoint places, 0 predicate places. [2022-11-02 20:50:05,512 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 434 transitions, 938 flow [2022-11-02 20:50:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:05,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:05,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-02 20:50:05,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash -344962585, now seen corresponding path program 1 times [2022-11-02 20:50:05,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:05,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164956254] [2022-11-02 20:50:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:05,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:05,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:05,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164956254] [2022-11-02 20:50:05,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164956254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:05,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:05,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925680256] [2022-11-02 20:50:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:05,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:05,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:05,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:05,542 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 535 [2022-11-02 20:50:05,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 434 transitions, 938 flow. Second operand has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:05,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 535 [2022-11-02 20:50:05,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:05,857 INFO L130 PetriNetUnfolder]: 0/724 cut-off events. [2022-11-02 20:50:05,857 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-02 20:50:05,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 724 events. 0/724 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2417 event pairs, 0 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-11-02 20:50:05,859 INFO L137 encePairwiseOnDemand]: 532/535 looper letters, 23 selfloop transitions, 2 changer transitions 0/438 dead transitions. [2022-11-02 20:50:05,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 438 transitions, 996 flow [2022-11-02 20:50:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1301 transitions. [2022-11-02 20:50:05,860 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8105919003115265 [2022-11-02 20:50:05,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1301 transitions. [2022-11-02 20:50:05,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1301 transitions. [2022-11-02 20:50:05,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:05,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1301 transitions. [2022-11-02 20:50:05,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 433.6666666666667) internal successors, (1301), 3 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,863 INFO L175 Difference]: Start difference. First operand has 476 places, 434 transitions, 938 flow. Second operand 3 states and 1301 transitions. [2022-11-02 20:50:05,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 438 transitions, 996 flow [2022-11-02 20:50:05,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 996 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:05,868 INFO L231 Difference]: Finished difference. Result has 467 places, 435 transitions, 950 flow [2022-11-02 20:50:05,868 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=950, PETRI_PLACES=467, PETRI_TRANSITIONS=435} [2022-11-02 20:50:05,868 INFO L287 CegarLoopForPetriNet]: 476 programPoint places, -9 predicate places. [2022-11-02 20:50:05,868 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 435 transitions, 950 flow [2022-11-02 20:50:05,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:05,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:05,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:05,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-11-02 20:50:05,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash 438271168, now seen corresponding path program 1 times [2022-11-02 20:50:05,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:05,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937353492] [2022-11-02 20:50:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:05,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:05,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:05,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937353492] [2022-11-02 20:50:05,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937353492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:05,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289675478] [2022-11-02 20:50:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:05,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:05,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:05,921 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:05,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:50:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:06,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:06,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289675478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:06,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:06,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812906587] [2022-11-02 20:50:06,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:06,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:06,263 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-11-02 20:50:06,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 435 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:06,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-11-02 20:50:06,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:06,612 INFO L130 PetriNetUnfolder]: 0/698 cut-off events. [2022-11-02 20:50:06,612 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:50:06,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 698 events. 0/698 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2266 event pairs, 0 based on Foata normal form. 2/700 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-02 20:50:06,615 INFO L137 encePairwiseOnDemand]: 529/535 looper letters, 24 selfloop transitions, 9 changer transitions 0/445 dead transitions. [2022-11-02 20:50:06,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 445 transitions, 1038 flow [2022-11-02 20:50:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3851 transitions. [2022-11-02 20:50:06,620 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7997923156801662 [2022-11-02 20:50:06,620 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3851 transitions. [2022-11-02 20:50:06,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3851 transitions. [2022-11-02 20:50:06,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:06,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3851 transitions. [2022-11-02 20:50:06,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 427.8888888888889) internal successors, (3851), 9 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,630 INFO L175 Difference]: Start difference. First operand has 467 places, 435 transitions, 950 flow. Second operand 9 states and 3851 transitions. [2022-11-02 20:50:06,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 445 transitions, 1038 flow [2022-11-02 20:50:06,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 445 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:06,640 INFO L231 Difference]: Finished difference. Result has 477 places, 441 transitions, 998 flow [2022-11-02 20:50:06,641 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=477, PETRI_TRANSITIONS=441} [2022-11-02 20:50:06,642 INFO L287 CegarLoopForPetriNet]: 476 programPoint places, 1 predicate places. [2022-11-02 20:50:06,642 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 441 transitions, 998 flow [2022-11-02 20:50:06,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:06,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:06,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:06,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:06,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-11-02 20:50:06,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 776120501, now seen corresponding path program 1 times [2022-11-02 20:50:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728894931] [2022-11-02 20:50:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:06,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728894931] [2022-11-02 20:50:06,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728894931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:06,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795875060] [2022-11-02 20:50:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:06,951 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:06,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 20:50:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:07,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:07,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:07,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795875060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:07,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:07,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:07,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987273068] [2022-11-02 20:50:07,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:07,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:07,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:07,409 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-11-02 20:50:07,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 441 transitions, 998 flow. Second operand has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:07,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-11-02 20:50:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:07,943 INFO L130 PetriNetUnfolder]: 0/646 cut-off events. [2022-11-02 20:50:07,944 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-02 20:50:07,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 646 events. 0/646 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1925 event pairs, 0 based on Foata normal form. 4/650 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:50:07,946 INFO L137 encePairwiseOnDemand]: 529/535 looper letters, 32 selfloop transitions, 21 changer transitions 0/465 dead transitions. [2022-11-02 20:50:07,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 465 transitions, 1212 flow [2022-11-02 20:50:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8961 transitions. [2022-11-02 20:50:07,953 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7975967957276369 [2022-11-02 20:50:07,953 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8961 transitions. [2022-11-02 20:50:07,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8961 transitions. [2022-11-02 20:50:07,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:07,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8961 transitions. [2022-11-02 20:50:07,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 426.7142857142857) internal successors, (8961), 21 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,974 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,974 INFO L175 Difference]: Start difference. First operand has 477 places, 441 transitions, 998 flow. Second operand 21 states and 8961 transitions. [2022-11-02 20:50:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 465 transitions, 1212 flow [2022-11-02 20:50:07,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 465 transitions, 1198 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:07,983 INFO L231 Difference]: Finished difference. Result has 501 places, 454 transitions, 1122 flow [2022-11-02 20:50:07,983 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1122, PETRI_PLACES=501, PETRI_TRANSITIONS=454} [2022-11-02 20:50:07,984 INFO L287 CegarLoopForPetriNet]: 476 programPoint places, 25 predicate places. [2022-11-02 20:50:07,984 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 454 transitions, 1122 flow [2022-11-02 20:50:07,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:07,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:07,985 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:08,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:08,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:08,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1898501803, now seen corresponding path program 1 times [2022-11-02 20:50:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:08,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989684396] [2022-11-02 20:50:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:08,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989684396] [2022-11-02 20:50:08,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989684396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:08,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755718653] [2022-11-02 20:50:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:08,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:08,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:08,468 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:08,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 20:50:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:08,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:09,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755718653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:09,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:09,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:09,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672415733] [2022-11-02 20:50:09,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:09,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:09,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:09,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:09,266 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-11-02 20:50:09,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 454 transitions, 1122 flow. Second operand has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:09,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:09,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-11-02 20:50:09,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:10,248 INFO L130 PetriNetUnfolder]: 0/542 cut-off events. [2022-11-02 20:50:10,248 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-02 20:50:10,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-11-02 20:50:10,250 INFO L137 encePairwiseOnDemand]: 530/535 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-11-02 20:50:10,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-11-02 20:50:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:50:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:50:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19176 transitions. [2022-11-02 20:50:10,309 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7965109034267913 [2022-11-02 20:50:10,309 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19176 transitions. [2022-11-02 20:50:10,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19176 transitions. [2022-11-02 20:50:10,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:10,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19176 transitions. [2022-11-02 20:50:10,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 426.1333333333333) internal successors, (19176), 45 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,344 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,344 INFO L175 Difference]: Start difference. First operand has 501 places, 454 transitions, 1122 flow. Second operand 45 states and 19176 transitions. [2022-11-02 20:50:10,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-11-02 20:50:10,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-11-02 20:50:10,354 INFO L231 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-11-02 20:50:10,354 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-11-02 20:50:10,355 INFO L287 CegarLoopForPetriNet]: 476 programPoint places, 43 predicate places. [2022-11-02 20:50:10,355 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-11-02 20:50:10,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:10,357 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:10,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:10,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:10,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1167770068, now seen corresponding path program 1 times [2022-11-02 20:50:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:10,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301942157] [2022-11-02 20:50:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:10,591 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:10,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:10,633 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:10,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:50:10,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:50:10,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-11-02 20:50:10,633 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:50:10,633 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:10,634 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-11-02 20:50:10,682 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:10,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 505 places, 568 transitions, 1421 flow [2022-11-02 20:50:11,139 INFO L130 PetriNetUnfolder]: 154/1148 cut-off events. [2022-11-02 20:50:11,139 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-02 20:50:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 1148 events. 154/1148 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4320 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1196. Up to 32 conditions per place. [2022-11-02 20:50:11,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 505 places, 568 transitions, 1421 flow [2022-11-02 20:50:11,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 505 places, 568 transitions, 1421 flow [2022-11-02 20:50:11,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:11,201 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:11,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:50:11,209 INFO L130 PetriNetUnfolder]: 5/91 cut-off events. [2022-11-02 20:50:11,209 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:11,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:11,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:11,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1466428135, now seen corresponding path program 1 times [2022-11-02 20:50:11,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:11,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358493595] [2022-11-02 20:50:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:11,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:11,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358493595] [2022-11-02 20:50:11,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358493595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:11,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:11,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:11,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824874314] [2022-11-02 20:50:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:11,241 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 451 out of 568 [2022-11-02 20:50:11,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 568 transitions, 1421 flow. Second operand has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:11,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:11,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 451 of 568 [2022-11-02 20:50:11,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:11,724 INFO L130 PetriNetUnfolder]: 0/953 cut-off events. [2022-11-02 20:50:11,725 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-02 20:50:11,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 953 events. 0/953 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3868 event pairs, 0 based on Foata normal form. 3789/4712 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-11-02 20:50:11,726 INFO L137 encePairwiseOnDemand]: 471/568 looper letters, 24 selfloop transitions, 2 changer transitions 12/477 dead transitions. [2022-11-02 20:50:11,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 477 transitions, 1291 flow [2022-11-02 20:50:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-11-02 20:50:11,728 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.869131455399061 [2022-11-02 20:50:11,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-11-02 20:50:11,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-11-02 20:50:11,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:11,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-11-02 20:50:11,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:11,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:11,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:11,733 INFO L175 Difference]: Start difference. First operand has 505 places, 568 transitions, 1421 flow. Second operand 3 states and 1481 transitions. [2022-11-02 20:50:11,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 477 transitions, 1291 flow [2022-11-02 20:50:11,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 477 transitions, 1081 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:11,740 INFO L231 Difference]: Finished difference. Result has 507 places, 462 transitions, 1009 flow [2022-11-02 20:50:11,741 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1009, PETRI_PLACES=507, PETRI_TRANSITIONS=462} [2022-11-02 20:50:11,741 INFO L287 CegarLoopForPetriNet]: 505 programPoint places, 2 predicate places. [2022-11-02 20:50:11,741 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 462 transitions, 1009 flow [2022-11-02 20:50:11,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:11,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:11,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:11,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-11-02 20:50:11,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:11,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2049574688, now seen corresponding path program 1 times [2022-11-02 20:50:11,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:11,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517634978] [2022-11-02 20:50:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:11,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:11,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517634978] [2022-11-02 20:50:11,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517634978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843665025] [2022-11-02 20:50:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:11,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:11,792 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:11,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 20:50:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:12,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:12,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:12,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843665025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:12,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:12,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446771135] [2022-11-02 20:50:12,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:12,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:12,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:12,200 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-11-02 20:50:12,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 462 transitions, 1009 flow. Second operand has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:12,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-11-02 20:50:12,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:12,613 INFO L130 PetriNetUnfolder]: 0/747 cut-off events. [2022-11-02 20:50:12,613 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:50:12,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 747 events. 0/747 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2450 event pairs, 0 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-02 20:50:12,615 INFO L137 encePairwiseOnDemand]: 562/568 looper letters, 25 selfloop transitions, 9 changer transitions 0/472 dead transitions. [2022-11-02 20:50:12,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 472 transitions, 1099 flow [2022-11-02 20:50:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4086 transitions. [2022-11-02 20:50:12,619 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7992957746478874 [2022-11-02 20:50:12,619 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4086 transitions. [2022-11-02 20:50:12,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4086 transitions. [2022-11-02 20:50:12,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:12,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4086 transitions. [2022-11-02 20:50:12,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,626 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,626 INFO L175 Difference]: Start difference. First operand has 507 places, 462 transitions, 1009 flow. Second operand 9 states and 4086 transitions. [2022-11-02 20:50:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 472 transitions, 1099 flow [2022-11-02 20:50:12,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 472 transitions, 1097 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:12,635 INFO L231 Difference]: Finished difference. Result has 505 places, 468 transitions, 1057 flow [2022-11-02 20:50:12,636 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1057, PETRI_PLACES=505, PETRI_TRANSITIONS=468} [2022-11-02 20:50:12,637 INFO L287 CegarLoopForPetriNet]: 505 programPoint places, 0 predicate places. [2022-11-02 20:50:12,637 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 468 transitions, 1057 flow [2022-11-02 20:50:12,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:12,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:12,638 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:12,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:12,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash -409296107, now seen corresponding path program 1 times [2022-11-02 20:50:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:12,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327211733] [2022-11-02 20:50:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:12,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327211733] [2022-11-02 20:50:12,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327211733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662747706] [2022-11-02 20:50:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:12,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:12,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:12,975 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:12,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-02 20:50:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:13,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:13,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662747706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:13,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:13,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837251485] [2022-11-02 20:50:13,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:13,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:13,439 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-11-02 20:50:13,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 468 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:13,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:13,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-11-02 20:50:13,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:14,117 INFO L130 PetriNetUnfolder]: 0/695 cut-off events. [2022-11-02 20:50:14,117 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-02 20:50:14,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 695 events. 0/695 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2103 event pairs, 0 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-02 20:50:14,119 INFO L137 encePairwiseOnDemand]: 562/568 looper letters, 33 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2022-11-02 20:50:14,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 492 transitions, 1273 flow [2022-11-02 20:50:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9508 transitions. [2022-11-02 20:50:14,132 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7971160295103957 [2022-11-02 20:50:14,133 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9508 transitions. [2022-11-02 20:50:14,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9508 transitions. [2022-11-02 20:50:14,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:14,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9508 transitions. [2022-11-02 20:50:14,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 452.76190476190476) internal successors, (9508), 21 states have internal predecessors, (9508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:14,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:14,164 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:14,164 INFO L175 Difference]: Start difference. First operand has 505 places, 468 transitions, 1057 flow. Second operand 21 states and 9508 transitions. [2022-11-02 20:50:14,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 492 transitions, 1273 flow [2022-11-02 20:50:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:14,176 INFO L231 Difference]: Finished difference. Result has 529 places, 481 transitions, 1181 flow [2022-11-02 20:50:14,176 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1181, PETRI_PLACES=529, PETRI_TRANSITIONS=481} [2022-11-02 20:50:14,177 INFO L287 CegarLoopForPetriNet]: 505 programPoint places, 24 predicate places. [2022-11-02 20:50:14,177 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 481 transitions, 1181 flow [2022-11-02 20:50:14,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:14,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:14,179 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:14,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:14,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:14,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:14,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash 579530123, now seen corresponding path program 1 times [2022-11-02 20:50:14,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:14,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629325203] [2022-11-02 20:50:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:14,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629325203] [2022-11-02 20:50:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629325203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668573867] [2022-11-02 20:50:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:14,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:14,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:14,674 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:14,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-02 20:50:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:14,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:14,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:15,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:15,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668573867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:15,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:15,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171005418] [2022-11-02 20:50:15,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:15,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:15,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:15,410 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-11-02 20:50:15,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 481 transitions, 1181 flow. Second operand has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:15,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:15,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-11-02 20:50:15,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:16,289 INFO L130 PetriNetUnfolder]: 0/591 cut-off events. [2022-11-02 20:50:16,289 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-11-02 20:50:16,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 591 events. 0/591 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1423 event pairs, 0 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-02 20:50:16,290 INFO L137 encePairwiseOnDemand]: 562/568 looper letters, 49 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2022-11-02 20:50:16,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 532 transitions, 1685 flow [2022-11-02 20:50:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:50:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:50:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20352 transitions. [2022-11-02 20:50:16,304 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7962441314553991 [2022-11-02 20:50:16,304 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20352 transitions. [2022-11-02 20:50:16,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20352 transitions. [2022-11-02 20:50:16,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:16,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20352 transitions. [2022-11-02 20:50:16,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 452.26666666666665) internal successors, (20352), 45 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:16,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:16,334 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:16,334 INFO L175 Difference]: Start difference. First operand has 529 places, 481 transitions, 1181 flow. Second operand 45 states and 20352 transitions. [2022-11-02 20:50:16,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 532 transitions, 1685 flow [2022-11-02 20:50:16,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 532 transitions, 1645 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:50:16,343 INFO L231 Difference]: Finished difference. Result has 576 places, 506 transitions, 1459 flow [2022-11-02 20:50:16,343 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1459, PETRI_PLACES=576, PETRI_TRANSITIONS=506} [2022-11-02 20:50:16,344 INFO L287 CegarLoopForPetriNet]: 505 programPoint places, 71 predicate places. [2022-11-02 20:50:16,344 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 506 transitions, 1459 flow [2022-11-02 20:50:16,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:16,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:16,347 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:16,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:16,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -813914885, now seen corresponding path program 1 times [2022-11-02 20:50:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550979383] [2022-11-02 20:50:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:16,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:16,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:16,634 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:16,634 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:50:16,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:50:16,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-11-02 20:50:16,635 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-02 20:50:16,635 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:16,635 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-11-02 20:50:16,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:16,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 534 places, 601 transitions, 1522 flow [2022-11-02 20:50:17,141 INFO L130 PetriNetUnfolder]: 164/1220 cut-off events. [2022-11-02 20:50:17,141 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-02 20:50:17,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1220 events. 164/1220 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4565 event pairs, 0 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1286. Up to 34 conditions per place. [2022-11-02 20:50:17,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 534 places, 601 transitions, 1522 flow [2022-11-02 20:50:17,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 601 transitions, 1522 flow [2022-11-02 20:50:17,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:17,202 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:17,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:50:17,208 INFO L130 PetriNetUnfolder]: 5/90 cut-off events. [2022-11-02 20:50:17,208 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:17,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:17,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:17,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash 721388231, now seen corresponding path program 1 times [2022-11-02 20:50:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656150173] [2022-11-02 20:50:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:17,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656150173] [2022-11-02 20:50:17,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656150173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:17,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:17,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:17,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99114032] [2022-11-02 20:50:17,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:17,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:17,235 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 477 out of 601 [2022-11-02 20:50:17,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 601 transitions, 1522 flow. Second operand has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:17,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 477 of 601 [2022-11-02 20:50:17,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:17,760 INFO L130 PetriNetUnfolder]: 0/1014 cut-off events. [2022-11-02 20:50:17,760 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-02 20:50:17,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 1014 events. 0/1014 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4128 event pairs, 0 based on Foata normal form. 4329/5311 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-11-02 20:50:17,763 INFO L137 encePairwiseOnDemand]: 498/601 looper letters, 25 selfloop transitions, 2 changer transitions 12/504 dead transitions. [2022-11-02 20:50:17,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 504 transitions, 1382 flow [2022-11-02 20:50:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1566 transitions. [2022-11-02 20:50:17,765 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8685524126455907 [2022-11-02 20:50:17,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1566 transitions. [2022-11-02 20:50:17,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1566 transitions. [2022-11-02 20:50:17,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:17,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1566 transitions. [2022-11-02 20:50:17,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 522.0) internal successors, (1566), 3 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,769 INFO L175 Difference]: Start difference. First operand has 534 places, 601 transitions, 1522 flow. Second operand 3 states and 1566 transitions. [2022-11-02 20:50:17,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 504 transitions, 1382 flow [2022-11-02 20:50:17,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 504 transitions, 1142 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:17,779 INFO L231 Difference]: Finished difference. Result has 536 places, 489 transitions, 1068 flow [2022-11-02 20:50:17,779 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1068, PETRI_PLACES=536, PETRI_TRANSITIONS=489} [2022-11-02 20:50:17,780 INFO L287 CegarLoopForPetriNet]: 534 programPoint places, 2 predicate places. [2022-11-02 20:50:17,780 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 489 transitions, 1068 flow [2022-11-02 20:50:17,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:17,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:17,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-11-02 20:50:17,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1266935680, now seen corresponding path program 1 times [2022-11-02 20:50:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383721547] [2022-11-02 20:50:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:17,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383721547] [2022-11-02 20:50:17,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383721547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:17,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208545279] [2022-11-02 20:50:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:17,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:17,831 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:17,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-02 20:50:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:18,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208545279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:18,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:18,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908525789] [2022-11-02 20:50:18,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:18,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:18,222 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-02 20:50:18,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 489 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:18,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:18,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-02 20:50:18,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:18,637 INFO L130 PetriNetUnfolder]: 0/796 cut-off events. [2022-11-02 20:50:18,637 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:50:18,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 796 events. 0/796 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2638 event pairs, 0 based on Foata normal form. 2/798 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-02 20:50:18,638 INFO L137 encePairwiseOnDemand]: 595/601 looper letters, 26 selfloop transitions, 9 changer transitions 0/499 dead transitions. [2022-11-02 20:50:18,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 499 transitions, 1160 flow [2022-11-02 20:50:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4321 transitions. [2022-11-02 20:50:18,641 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.798853762248105 [2022-11-02 20:50:18,641 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4321 transitions. [2022-11-02 20:50:18,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4321 transitions. [2022-11-02 20:50:18,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:18,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4321 transitions. [2022-11-02 20:50:18,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 480.1111111111111) internal successors, (4321), 9 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:18,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:18,646 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:18,646 INFO L175 Difference]: Start difference. First operand has 536 places, 489 transitions, 1068 flow. Second operand 9 states and 4321 transitions. [2022-11-02 20:50:18,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 499 transitions, 1160 flow [2022-11-02 20:50:18,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 499 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:18,651 INFO L231 Difference]: Finished difference. Result has 534 places, 495 transitions, 1116 flow [2022-11-02 20:50:18,652 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1116, PETRI_PLACES=534, PETRI_TRANSITIONS=495} [2022-11-02 20:50:18,652 INFO L287 CegarLoopForPetriNet]: 534 programPoint places, 0 predicate places. [2022-11-02 20:50:18,652 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 495 transitions, 1116 flow [2022-11-02 20:50:18,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:18,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:18,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:18,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:18,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:18,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash 567657013, now seen corresponding path program 1 times [2022-11-02 20:50:18,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:18,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710982501] [2022-11-02 20:50:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:18,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:18,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:18,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710982501] [2022-11-02 20:50:18,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710982501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:18,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137155809] [2022-11-02 20:50:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:18,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:18,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:18,941 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:18,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-02 20:50:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:19,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:19,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137155809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:19,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:19,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239764494] [2022-11-02 20:50:19,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:19,417 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-02 20:50:19,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 495 transitions, 1116 flow. Second operand has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:19,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:19,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-02 20:50:19,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:20,000 INFO L130 PetriNetUnfolder]: 0/744 cut-off events. [2022-11-02 20:50:20,000 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-02 20:50:20,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 744 events. 0/744 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2286 event pairs, 0 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-02 20:50:20,002 INFO L137 encePairwiseOnDemand]: 595/601 looper letters, 34 selfloop transitions, 21 changer transitions 0/519 dead transitions. [2022-11-02 20:50:20,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 519 transitions, 1334 flow [2022-11-02 20:50:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10055 transitions. [2022-11-02 20:50:20,009 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7966880595832343 [2022-11-02 20:50:20,009 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10055 transitions. [2022-11-02 20:50:20,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10055 transitions. [2022-11-02 20:50:20,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:20,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10055 transitions. [2022-11-02 20:50:20,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 478.8095238095238) internal successors, (10055), 21 states have internal predecessors, (10055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:20,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:20,027 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:20,027 INFO L175 Difference]: Start difference. First operand has 534 places, 495 transitions, 1116 flow. Second operand 21 states and 10055 transitions. [2022-11-02 20:50:20,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 519 transitions, 1334 flow [2022-11-02 20:50:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 519 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:20,038 INFO L231 Difference]: Finished difference. Result has 558 places, 508 transitions, 1240 flow [2022-11-02 20:50:20,039 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1240, PETRI_PLACES=558, PETRI_TRANSITIONS=508} [2022-11-02 20:50:20,039 INFO L287 CegarLoopForPetriNet]: 534 programPoint places, 24 predicate places. [2022-11-02 20:50:20,040 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 508 transitions, 1240 flow [2022-11-02 20:50:20,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:20,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:20,042 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:20,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-02 20:50:20,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-02 20:50:20,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1105185707, now seen corresponding path program 1 times [2022-11-02 20:50:20,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:20,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549818812] [2022-11-02 20:50:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:20,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549818812] [2022-11-02 20:50:20,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549818812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129669292] [2022-11-02 20:50:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:20,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:20,515 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:20,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-02 20:50:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:20,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:21,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129669292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:21,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:21,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:21,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794251843] [2022-11-02 20:50:21,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:21,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:21,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:21,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:21,309 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-02 20:50:21,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 508 transitions, 1240 flow. Second operand has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:21,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-02 20:50:21,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:22,242 INFO L130 PetriNetUnfolder]: 0/640 cut-off events. [2022-11-02 20:50:22,243 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-11-02 20:50:22,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 640 events. 0/640 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1606 event pairs, 0 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-11-02 20:50:22,245 INFO L137 encePairwiseOnDemand]: 595/601 looper letters, 50 selfloop transitions, 45 changer transitions 0/559 dead transitions. [2022-11-02 20:50:22,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 559 transitions, 1746 flow [2022-11-02 20:50:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:50:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:50:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21523 transitions. [2022-11-02 20:50:22,262 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.795821778517286 [2022-11-02 20:50:22,263 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21523 transitions. [2022-11-02 20:50:22,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21523 transitions. [2022-11-02 20:50:22,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:22,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21523 transitions. [2022-11-02 20:50:22,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 478.2888888888889) internal successors, (21523), 45 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:22,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:22,313 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:22,313 INFO L175 Difference]: Start difference. First operand has 558 places, 508 transitions, 1240 flow. Second operand 45 states and 21523 transitions. [2022-11-02 20:50:22,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 559 transitions, 1746 flow [2022-11-02 20:50:22,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 559 transitions, 1706 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:50:22,323 INFO L231 Difference]: Finished difference. Result has 605 places, 533 transitions, 1518 flow [2022-11-02 20:50:22,324 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1518, PETRI_PLACES=605, PETRI_TRANSITIONS=533} [2022-11-02 20:50:22,324 INFO L287 CegarLoopForPetriNet]: 534 programPoint places, 71 predicate places. [2022-11-02 20:50:22,324 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 533 transitions, 1518 flow [2022-11-02 20:50:22,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:22,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:22,327 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:22,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:22,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:22,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2142953785, now seen corresponding path program 1 times [2022-11-02 20:50:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:22,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745920426] [2022-11-02 20:50:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745920426] [2022-11-02 20:50:23,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745920426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862266212] [2022-11-02 20:50:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:23,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:23,183 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:23,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-02 20:50:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:50:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:23,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:24,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862266212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:24,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:24,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:50:24,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504694310] [2022-11-02 20:50:24,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:24,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:50:24,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:50:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:50:24,849 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-11-02 20:50:24,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 533 transitions, 1518 flow. Second operand has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:24,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:24,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-11-02 20:50:24,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:25,931 INFO L130 PetriNetUnfolder]: 0/614 cut-off events. [2022-11-02 20:50:25,931 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-02 20:50:25,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-11-02 20:50:25,933 INFO L137 encePairwiseOnDemand]: 596/601 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-11-02 20:50:25,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 552 transitions, 1852 flow [2022-11-02 20:50:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 20:50:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-02 20:50:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24378 transitions. [2022-11-02 20:50:25,946 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7953410981697171 [2022-11-02 20:50:25,946 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24378 transitions. [2022-11-02 20:50:25,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24378 transitions. [2022-11-02 20:50:25,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:25,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24378 transitions. [2022-11-02 20:50:25,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 478.0) internal successors, (24378), 51 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:25,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:25,988 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:25,988 INFO L175 Difference]: Start difference. First operand has 605 places, 533 transitions, 1518 flow. Second operand 51 states and 24378 transitions. [2022-11-02 20:50:25,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 552 transitions, 1852 flow [2022-11-02 20:50:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-11-02 20:50:25,997 INFO L231 Difference]: Finished difference. Result has 609 places, 523 transitions, 1471 flow [2022-11-02 20:50:25,997 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=609, PETRI_TRANSITIONS=523} [2022-11-02 20:50:25,998 INFO L287 CegarLoopForPetriNet]: 534 programPoint places, 75 predicate places. [2022-11-02 20:50:25,999 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 523 transitions, 1471 flow [2022-11-02 20:50:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:26,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:26,004 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:26,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:26,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-11-02 20:50:26,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:26,205 INFO L85 PathProgramCache]: Analyzing trace with hash -823919421, now seen corresponding path program 1 times [2022-11-02 20:50:26,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:26,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714165760] [2022-11-02 20:50:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:26,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:26,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:26,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:26,304 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:26,305 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:50:26,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:50:26,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-11-02 20:50:26,305 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:50:26,306 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:26,306 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-11-02 20:50:26,366 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 563 places, 634 transitions, 1625 flow [2022-11-02 20:50:26,935 INFO L130 PetriNetUnfolder]: 174/1292 cut-off events. [2022-11-02 20:50:26,935 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-11-02 20:50:26,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1292 events. 174/1292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4856 event pairs, 0 based on Foata normal form. 0/1082 useless extension candidates. Maximal degree in co-relation 1377. Up to 36 conditions per place. [2022-11-02 20:50:26,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 563 places, 634 transitions, 1625 flow [2022-11-02 20:50:27,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 634 transitions, 1625 flow [2022-11-02 20:50:27,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:27,014 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:27,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:50:27,021 INFO L130 PetriNetUnfolder]: 5/89 cut-off events. [2022-11-02 20:50:27,021 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:27,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:27,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:27,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2008288006, now seen corresponding path program 1 times [2022-11-02 20:50:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:27,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330982699] [2022-11-02 20:50:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:27,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:27,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330982699] [2022-11-02 20:50:27,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330982699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:27,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:27,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:27,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869843413] [2022-11-02 20:50:27,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:27,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:50:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:50:27,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:27,042 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 510 out of 634 [2022-11-02 20:50:27,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 634 transitions, 1625 flow. Second operand has 2 states, 2 states have (on average 510.5) internal successors, (1021), 2 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:27,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 510 of 634 [2022-11-02 20:50:27,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:27,485 INFO L130 PetriNetUnfolder]: 0/1100 cut-off events. [2022-11-02 20:50:27,485 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-11-02 20:50:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 1100 events. 0/1100 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4468 event pairs, 0 based on Foata normal form. 896/1960 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-02 20:50:27,487 INFO L137 encePairwiseOnDemand]: 528/634 looper letters, 17 selfloop transitions, 0 changer transitions 12/527 dead transitions. [2022-11-02 20:50:27,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 527 transitions, 1445 flow [2022-11-02 20:50:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:50:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:50:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1143 transitions. [2022-11-02 20:50:27,489 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9014195583596214 [2022-11-02 20:50:27,489 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1143 transitions. [2022-11-02 20:50:27,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1143 transitions. [2022-11-02 20:50:27,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:27,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1143 transitions. [2022-11-02 20:50:27,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 571.5) internal successors, (1143), 2 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,491 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,491 INFO L175 Difference]: Start difference. First operand has 563 places, 634 transitions, 1625 flow. Second operand 2 states and 1143 transitions. [2022-11-02 20:50:27,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 527 transitions, 1445 flow [2022-11-02 20:50:27,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 527 transitions, 1173 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:27,497 INFO L231 Difference]: Finished difference. Result has 563 places, 515 transitions, 1115 flow [2022-11-02 20:50:27,497 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1115, PETRI_PLACES=563, PETRI_TRANSITIONS=515} [2022-11-02 20:50:27,497 INFO L287 CegarLoopForPetriNet]: 563 programPoint places, 0 predicate places. [2022-11-02 20:50:27,498 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 515 transitions, 1115 flow [2022-11-02 20:50:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 510.5) internal successors, (1021), 2 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:27,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:27,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-11-02 20:50:27,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1714884999, now seen corresponding path program 1 times [2022-11-02 20:50:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:27,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749918251] [2022-11-02 20:50:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749918251] [2022-11-02 20:50:27,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749918251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:27,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:27,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:27,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709316302] [2022-11-02 20:50:27,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:27,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:27,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:27,520 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 634 [2022-11-02 20:50:27,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 515 transitions, 1115 flow. Second operand has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:27,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 634 [2022-11-02 20:50:27,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:27,887 INFO L130 PetriNetUnfolder]: 0/871 cut-off events. [2022-11-02 20:50:27,887 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-02 20:50:27,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 871 events. 0/871 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2966 event pairs, 0 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-11-02 20:50:27,889 INFO L137 encePairwiseOnDemand]: 631/634 looper letters, 26 selfloop transitions, 2 changer transitions 0/519 dead transitions. [2022-11-02 20:50:27,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 519 transitions, 1179 flow [2022-11-02 20:50:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1538 transitions. [2022-11-02 20:50:27,890 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8086225026288117 [2022-11-02 20:50:27,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1538 transitions. [2022-11-02 20:50:27,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1538 transitions. [2022-11-02 20:50:27,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:27,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1538 transitions. [2022-11-02 20:50:27,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 512.6666666666666) internal successors, (1538), 3 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 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) [2022-11-02 20:50:27,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 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) [2022-11-02 20:50:27,893 INFO L175 Difference]: Start difference. First operand has 563 places, 515 transitions, 1115 flow. Second operand 3 states and 1538 transitions. [2022-11-02 20:50:27,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 519 transitions, 1179 flow [2022-11-02 20:50:27,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 519 transitions, 1179 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:27,899 INFO L231 Difference]: Finished difference. Result has 554 places, 516 transitions, 1127 flow [2022-11-02 20:50:27,899 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1127, PETRI_PLACES=554, PETRI_TRANSITIONS=516} [2022-11-02 20:50:27,899 INFO L287 CegarLoopForPetriNet]: 563 programPoint places, -9 predicate places. [2022-11-02 20:50:27,899 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 516 transitions, 1127 flow [2022-11-02 20:50:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:27,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:27,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:27,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-11-02 20:50:27,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1508779104, now seen corresponding path program 1 times [2022-11-02 20:50:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:27,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364213677] [2022-11-02 20:50:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:27,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364213677] [2022-11-02 20:50:27,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364213677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382436382] [2022-11-02 20:50:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:27,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:27,939 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:27,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-02 20:50:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:28,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382436382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:28,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:28,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89035143] [2022-11-02 20:50:28,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:28,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:28,342 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-02 20:50:28,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 516 transitions, 1127 flow. Second operand has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:28,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-02 20:50:28,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:28,754 INFO L130 PetriNetUnfolder]: 0/845 cut-off events. [2022-11-02 20:50:28,754 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-02 20:50:28,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 845 events. 0/845 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2819 event pairs, 0 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-02 20:50:28,756 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 27 selfloop transitions, 9 changer transitions 0/526 dead transitions. [2022-11-02 20:50:28,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 526 transitions, 1221 flow [2022-11-02 20:50:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4556 transitions. [2022-11-02 20:50:28,760 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7984577637574483 [2022-11-02 20:50:28,760 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4556 transitions. [2022-11-02 20:50:28,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4556 transitions. [2022-11-02 20:50:28,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:28,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4556 transitions. [2022-11-02 20:50:28,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.22222222222223) internal successors, (4556), 9 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,766 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,766 INFO L175 Difference]: Start difference. First operand has 554 places, 516 transitions, 1127 flow. Second operand 9 states and 4556 transitions. [2022-11-02 20:50:28,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 526 transitions, 1221 flow [2022-11-02 20:50:28,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 526 transitions, 1219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:28,772 INFO L231 Difference]: Finished difference. Result has 564 places, 522 transitions, 1175 flow [2022-11-02 20:50:28,773 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1175, PETRI_PLACES=564, PETRI_TRANSITIONS=522} [2022-11-02 20:50:28,773 INFO L287 CegarLoopForPetriNet]: 563 programPoint places, 1 predicate places. [2022-11-02 20:50:28,773 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 522 transitions, 1175 flow [2022-11-02 20:50:28,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:28,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:28,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:28,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:28,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-11-02 20:50:28,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash -587987435, now seen corresponding path program 1 times [2022-11-02 20:50:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911985636] [2022-11-02 20:50:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:28,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:29,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911985636] [2022-11-02 20:50:29,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911985636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979464585] [2022-11-02 20:50:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:29,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:29,053 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:29,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-02 20:50:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:29,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:29,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979464585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:29,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:29,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:29,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701177645] [2022-11-02 20:50:29,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:29,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:29,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:29,545 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-02 20:50:29,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 522 transitions, 1175 flow. Second operand has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:29,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:29,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-02 20:50:29,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:30,251 INFO L130 PetriNetUnfolder]: 0/793 cut-off events. [2022-11-02 20:50:30,252 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-02 20:50:30,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 793 events. 0/793 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2469 event pairs, 0 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-02 20:50:30,253 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 35 selfloop transitions, 21 changer transitions 0/546 dead transitions. [2022-11-02 20:50:30,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 546 transitions, 1395 flow [2022-11-02 20:50:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10602 transitions. [2022-11-02 20:50:30,263 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7963046417305092 [2022-11-02 20:50:30,263 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10602 transitions. [2022-11-02 20:50:30,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10602 transitions. [2022-11-02 20:50:30,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:30,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10602 transitions. [2022-11-02 20:50:30,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 504.85714285714283) internal successors, (10602), 21 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,291 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,291 INFO L175 Difference]: Start difference. First operand has 564 places, 522 transitions, 1175 flow. Second operand 21 states and 10602 transitions. [2022-11-02 20:50:30,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 546 transitions, 1395 flow [2022-11-02 20:50:30,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 546 transitions, 1381 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:30,300 INFO L231 Difference]: Finished difference. Result has 588 places, 535 transitions, 1299 flow [2022-11-02 20:50:30,301 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1299, PETRI_PLACES=588, PETRI_TRANSITIONS=535} [2022-11-02 20:50:30,301 INFO L287 CegarLoopForPetriNet]: 563 programPoint places, 25 predicate places. [2022-11-02 20:50:30,301 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 535 transitions, 1299 flow [2022-11-02 20:50:30,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:30,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:30,303 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:30,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-02 20:50:30,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:30,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash -819498741, now seen corresponding path program 1 times [2022-11-02 20:50:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:30,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145415564] [2022-11-02 20:50:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:30,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145415564] [2022-11-02 20:50:30,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145415564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396450164] [2022-11-02 20:50:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:30,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:30,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:30,714 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:30,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-02 20:50:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:31,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:31,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:31,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396450164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:31,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:31,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629580200] [2022-11-02 20:50:31,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:31,495 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-02 20:50:31,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 535 transitions, 1299 flow. Second operand has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:31,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:31,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-02 20:50:31,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:32,458 INFO L130 PetriNetUnfolder]: 0/689 cut-off events. [2022-11-02 20:50:32,458 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-11-02 20:50:32,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 689 events. 0/689 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1791 event pairs, 0 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-02 20:50:32,460 INFO L137 encePairwiseOnDemand]: 628/634 looper letters, 51 selfloop transitions, 45 changer transitions 0/586 dead transitions. [2022-11-02 20:50:32,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 586 transitions, 1807 flow [2022-11-02 20:50:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:50:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:50:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22694 transitions. [2022-11-02 20:50:32,477 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7954433929197336 [2022-11-02 20:50:32,477 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22694 transitions. [2022-11-02 20:50:32,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22694 transitions. [2022-11-02 20:50:32,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:32,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22694 transitions. [2022-11-02 20:50:32,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 504.31111111111113) internal successors, (22694), 45 states have internal predecessors, (22694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,514 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,514 INFO L175 Difference]: Start difference. First operand has 588 places, 535 transitions, 1299 flow. Second operand 45 states and 22694 transitions. [2022-11-02 20:50:32,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 586 transitions, 1807 flow [2022-11-02 20:50:32,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 586 transitions, 1767 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:50:32,525 INFO L231 Difference]: Finished difference. Result has 635 places, 560 transitions, 1577 flow [2022-11-02 20:50:32,526 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1577, PETRI_PLACES=635, PETRI_TRANSITIONS=560} [2022-11-02 20:50:32,527 INFO L287 CegarLoopForPetriNet]: 563 programPoint places, 72 predicate places. [2022-11-02 20:50:32,527 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 560 transitions, 1577 flow [2022-11-02 20:50:32,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:32,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:32,530 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:32,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-11-02 20:50:32,746 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1853815001, now seen corresponding path program 1 times [2022-11-02 20:50:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:32,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224872351] [2022-11-02 20:50:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:33,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:33,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224872351] [2022-11-02 20:50:33,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224872351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:33,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258852615] [2022-11-02 20:50:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:33,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:33,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:33,579 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:33,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-02 20:50:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:33,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:50:33,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:34,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:35,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258852615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:35,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:35,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:50:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334067918] [2022-11-02 20:50:35,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:35,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:50:35,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:35,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:50:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:50:35,224 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-11-02 20:50:35,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 560 transitions, 1577 flow. Second operand has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:35,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:35,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-11-02 20:50:35,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:36,425 INFO L130 PetriNetUnfolder]: 0/650 cut-off events. [2022-11-02 20:50:36,425 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-11-02 20:50:36,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-02 20:50:36,427 INFO L137 encePairwiseOnDemand]: 629/634 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-11-02 20:50:36,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 584 transitions, 1967 flow [2022-11-02 20:50:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 20:50:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-02 20:50:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27217 transitions. [2022-11-02 20:50:36,444 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7949818904077579 [2022-11-02 20:50:36,444 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27217 transitions. [2022-11-02 20:50:36,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27217 transitions. [2022-11-02 20:50:36,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:36,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27217 transitions. [2022-11-02 20:50:36,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 504.01851851851853) internal successors, (27217), 54 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,564 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,565 INFO L175 Difference]: Start difference. First operand has 635 places, 560 transitions, 1577 flow. Second operand 54 states and 27217 transitions. [2022-11-02 20:50:36,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 584 transitions, 1967 flow [2022-11-02 20:50:36,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-11-02 20:50:36,573 INFO L231 Difference]: Finished difference. Result has 642 places, 553 transitions, 1559 flow [2022-11-02 20:50:36,573 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=642, PETRI_TRANSITIONS=553} [2022-11-02 20:50:36,574 INFO L287 CegarLoopForPetriNet]: 563 programPoint places, 79 predicate places. [2022-11-02 20:50:36,574 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 553 transitions, 1559 flow [2022-11-02 20:50:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:36,578 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:36,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-02 20:50:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-11-02 20:50:36,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1613944372, now seen corresponding path program 1 times [2022-11-02 20:50:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:36,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417318202] [2022-11-02 20:50:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:36,807 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:36,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:36,860 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:36,860 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:50:36,861 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:50:36,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-11-02 20:50:36,861 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:36,861 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:36,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-11-02 20:50:36,916 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:36,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 592 places, 667 transitions, 1730 flow [2022-11-02 20:50:37,575 INFO L130 PetriNetUnfolder]: 184/1364 cut-off events. [2022-11-02 20:50:37,575 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-11-02 20:50:37,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1590 conditions, 1364 events. 184/1364 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5156 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1469. Up to 38 conditions per place. [2022-11-02 20:50:37,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 592 places, 667 transitions, 1730 flow [2022-11-02 20:50:37,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 592 places, 667 transitions, 1730 flow [2022-11-02 20:50:37,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:37,651 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:37,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:50:37,655 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-02 20:50:37,655 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:37,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:37,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:37,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 445354150, now seen corresponding path program 1 times [2022-11-02 20:50:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45862968] [2022-11-02 20:50:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:37,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45862968] [2022-11-02 20:50:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45862968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:37,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891400567] [2022-11-02 20:50:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:50:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:50:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:37,673 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 667 [2022-11-02 20:50:37,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 667 transitions, 1730 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:37,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:37,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 667 [2022-11-02 20:50:37,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:38,236 INFO L130 PetriNetUnfolder]: 0/1161 cut-off events. [2022-11-02 20:50:38,236 INFO L131 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-11-02 20:50:38,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 1161 events. 0/1161 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4734 event pairs, 0 based on Foata normal form. 1002/2125 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-02 20:50:38,300 INFO L137 encePairwiseOnDemand]: 555/667 looper letters, 18 selfloop transitions, 0 changer transitions 12/554 dead transitions. [2022-11-02 20:50:38,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 554 transitions, 1540 flow [2022-11-02 20:50:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:50:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:50:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1202 transitions. [2022-11-02 20:50:38,301 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9010494752623688 [2022-11-02 20:50:38,301 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1202 transitions. [2022-11-02 20:50:38,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1202 transitions. [2022-11-02 20:50:38,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:38,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1202 transitions. [2022-11-02 20:50:38,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 601.0) internal successors, (1202), 2 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,304 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,304 INFO L175 Difference]: Start difference. First operand has 592 places, 667 transitions, 1730 flow. Second operand 2 states and 1202 transitions. [2022-11-02 20:50:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 554 transitions, 1540 flow [2022-11-02 20:50:38,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 554 transitions, 1234 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:38,311 INFO L231 Difference]: Finished difference. Result has 592 places, 542 transitions, 1174 flow [2022-11-02 20:50:38,312 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1174, PETRI_PLACES=592, PETRI_TRANSITIONS=542} [2022-11-02 20:50:38,312 INFO L287 CegarLoopForPetriNet]: 592 programPoint places, 0 predicate places. [2022-11-02 20:50:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 542 transitions, 1174 flow [2022-11-02 20:50:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:38,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-11-02 20:50:38,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash 151951143, now seen corresponding path program 1 times [2022-11-02 20:50:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802087436] [2022-11-02 20:50:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:38,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802087436] [2022-11-02 20:50:38,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802087436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:38,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120146975] [2022-11-02 20:50:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:38,334 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 667 [2022-11-02 20:50:38,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 542 transitions, 1174 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:38,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 667 [2022-11-02 20:50:38,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:38,849 INFO L130 PetriNetUnfolder]: 0/920 cut-off events. [2022-11-02 20:50:38,850 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-02 20:50:38,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 920 events. 0/920 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3149 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-11-02 20:50:38,851 INFO L137 encePairwiseOnDemand]: 664/667 looper letters, 27 selfloop transitions, 2 changer transitions 0/546 dead transitions. [2022-11-02 20:50:38,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 546 transitions, 1240 flow [2022-11-02 20:50:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1617 transitions. [2022-11-02 20:50:38,854 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.808095952023988 [2022-11-02 20:50:38,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1617 transitions. [2022-11-02 20:50:38,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1617 transitions. [2022-11-02 20:50:38,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:38,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1617 transitions. [2022-11-02 20:50:38,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,858 INFO L175 Difference]: Start difference. First operand has 592 places, 542 transitions, 1174 flow. Second operand 3 states and 1617 transitions. [2022-11-02 20:50:38,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 546 transitions, 1240 flow [2022-11-02 20:50:38,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:38,865 INFO L231 Difference]: Finished difference. Result has 583 places, 543 transitions, 1186 flow [2022-11-02 20:50:38,866 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1186, PETRI_PLACES=583, PETRI_TRANSITIONS=543} [2022-11-02 20:50:38,866 INFO L287 CegarLoopForPetriNet]: 592 programPoint places, -9 predicate places. [2022-11-02 20:50:38,867 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 543 transitions, 1186 flow [2022-11-02 20:50:38,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:38,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:38,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:38,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-11-02 20:50:38,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1519862336, now seen corresponding path program 1 times [2022-11-02 20:50:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:38,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430161041] [2022-11-02 20:50:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:38,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430161041] [2022-11-02 20:50:38,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430161041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:38,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677749418] [2022-11-02 20:50:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:38,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:38,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:38,914 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:38,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-02 20:50:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:39,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677749418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:39,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:39,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825671165] [2022-11-02 20:50:39,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:39,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:39,350 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-02 20:50:39,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 543 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:39,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:39,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-02 20:50:39,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:39,998 INFO L130 PetriNetUnfolder]: 0/894 cut-off events. [2022-11-02 20:50:39,998 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-02 20:50:39,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 894 events. 0/894 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3002 event pairs, 0 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-02 20:50:40,000 INFO L137 encePairwiseOnDemand]: 661/667 looper letters, 28 selfloop transitions, 9 changer transitions 0/553 dead transitions. [2022-11-02 20:50:40,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 553 transitions, 1282 flow [2022-11-02 20:50:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4791 transitions. [2022-11-02 20:50:40,003 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7981009495252374 [2022-11-02 20:50:40,003 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4791 transitions. [2022-11-02 20:50:40,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4791 transitions. [2022-11-02 20:50:40,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:40,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4791 transitions. [2022-11-02 20:50:40,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 532.3333333333334) internal successors, (4791), 9 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:40,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:40,010 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:40,010 INFO L175 Difference]: Start difference. First operand has 583 places, 543 transitions, 1186 flow. Second operand 9 states and 4791 transitions. [2022-11-02 20:50:40,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 553 transitions, 1282 flow [2022-11-02 20:50:40,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 553 transitions, 1280 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:40,022 INFO L231 Difference]: Finished difference. Result has 593 places, 549 transitions, 1234 flow [2022-11-02 20:50:40,022 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=593, PETRI_TRANSITIONS=549} [2022-11-02 20:50:40,023 INFO L287 CegarLoopForPetriNet]: 592 programPoint places, 1 predicate places. [2022-11-02 20:50:40,023 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 549 transitions, 1234 flow [2022-11-02 20:50:40,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:40,024 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:40,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:40,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:40,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 418737845, now seen corresponding path program 1 times [2022-11-02 20:50:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549368278] [2022-11-02 20:50:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:40,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:40,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549368278] [2022-11-02 20:50:40,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549368278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:40,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9776515] [2022-11-02 20:50:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:40,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:40,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:40,339 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:40,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-02 20:50:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:40,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:40,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9776515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:40,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:40,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:40,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095849575] [2022-11-02 20:50:40,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:40,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:40,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:40,991 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-02 20:50:40,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 549 transitions, 1234 flow. Second operand has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:40,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:40,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-02 20:50:40,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:41,719 INFO L130 PetriNetUnfolder]: 0/842 cut-off events. [2022-11-02 20:50:41,719 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-02 20:50:41,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 842 events. 0/842 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2655 event pairs, 0 based on Foata normal form. 4/846 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-02 20:50:41,721 INFO L137 encePairwiseOnDemand]: 661/667 looper letters, 36 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2022-11-02 20:50:41,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 573 transitions, 1456 flow [2022-11-02 20:50:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11149 transitions. [2022-11-02 20:50:41,729 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7959591632755051 [2022-11-02 20:50:41,729 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11149 transitions. [2022-11-02 20:50:41,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11149 transitions. [2022-11-02 20:50:41,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:41,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11149 transitions. [2022-11-02 20:50:41,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 530.9047619047619) internal successors, (11149), 21 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:41,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:41,747 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:41,747 INFO L175 Difference]: Start difference. First operand has 593 places, 549 transitions, 1234 flow. Second operand 21 states and 11149 transitions. [2022-11-02 20:50:41,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 573 transitions, 1456 flow [2022-11-02 20:50:41,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 573 transitions, 1442 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:41,756 INFO L231 Difference]: Finished difference. Result has 617 places, 562 transitions, 1358 flow [2022-11-02 20:50:41,756 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=617, PETRI_TRANSITIONS=562} [2022-11-02 20:50:41,757 INFO L287 CegarLoopForPetriNet]: 592 programPoint places, 25 predicate places. [2022-11-02 20:50:41,757 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 562 transitions, 1358 flow [2022-11-02 20:50:41,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:41,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:41,758 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:41,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-02 20:50:41,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:41,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash -899555925, now seen corresponding path program 1 times [2022-11-02 20:50:41,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:41,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046172454] [2022-11-02 20:50:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:42,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046172454] [2022-11-02 20:50:42,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046172454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325799494] [2022-11-02 20:50:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:42,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:42,187 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-02 20:50:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:42,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:43,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325799494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:43,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:43,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567797206] [2022-11-02 20:50:43,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:43,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:43,079 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-02 20:50:43,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 562 transitions, 1358 flow. Second operand has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:43,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:43,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-02 20:50:43,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:44,106 INFO L130 PetriNetUnfolder]: 0/738 cut-off events. [2022-11-02 20:50:44,106 INFO L131 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-11-02 20:50:44,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 738 events. 0/738 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1975 event pairs, 0 based on Foata normal form. 8/746 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-02 20:50:44,108 INFO L137 encePairwiseOnDemand]: 661/667 looper letters, 52 selfloop transitions, 45 changer transitions 0/613 dead transitions. [2022-11-02 20:50:44,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 613 transitions, 1868 flow [2022-11-02 20:50:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:50:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:50:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23865 transitions. [2022-11-02 20:50:44,120 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7951024487756122 [2022-11-02 20:50:44,120 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23865 transitions. [2022-11-02 20:50:44,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23865 transitions. [2022-11-02 20:50:44,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:44,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23865 transitions. [2022-11-02 20:50:44,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 530.3333333333334) internal successors, (23865), 45 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:44,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:44,157 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:44,157 INFO L175 Difference]: Start difference. First operand has 617 places, 562 transitions, 1358 flow. Second operand 45 states and 23865 transitions. [2022-11-02 20:50:44,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 613 transitions, 1868 flow [2022-11-02 20:50:44,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 613 transitions, 1828 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:50:44,168 INFO L231 Difference]: Finished difference. Result has 664 places, 587 transitions, 1636 flow [2022-11-02 20:50:44,168 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1636, PETRI_PLACES=664, PETRI_TRANSITIONS=587} [2022-11-02 20:50:44,169 INFO L287 CegarLoopForPetriNet]: 592 programPoint places, 72 predicate places. [2022-11-02 20:50:44,169 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 587 transitions, 1636 flow [2022-11-02 20:50:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:44,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:44,171 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:44,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-02 20:50:44,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:44,372 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash 707886023, now seen corresponding path program 1 times [2022-11-02 20:50:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:44,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026997332] [2022-11-02 20:50:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:44,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:45,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026997332] [2022-11-02 20:50:45,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026997332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585894274] [2022-11-02 20:50:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:45,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:45,175 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:45,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-02 20:50:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:50:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:45,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:46,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585894274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:46,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:46,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:50:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173299687] [2022-11-02 20:50:46,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:50:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:50:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:50:46,870 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-11-02 20:50:46,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 587 transitions, 1636 flow. Second operand has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:46,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:46,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-11-02 20:50:46,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:48,194 INFO L130 PetriNetUnfolder]: 0/686 cut-off events. [2022-11-02 20:50:48,194 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-02 20:50:48,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-11-02 20:50:48,196 INFO L137 encePairwiseOnDemand]: 662/667 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-11-02 20:50:48,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-11-02 20:50:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-02 20:50:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-02 20:50:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30212 transitions. [2022-11-02 20:50:48,213 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7946553039269839 [2022-11-02 20:50:48,213 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30212 transitions. [2022-11-02 20:50:48,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30212 transitions. [2022-11-02 20:50:48,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:48,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30212 transitions. [2022-11-02 20:50:48,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 530.0350877192982) internal successors, (30212), 57 states have internal predecessors, (30212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:48,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:48,260 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:48,260 INFO L175 Difference]: Start difference. First operand has 664 places, 587 transitions, 1636 flow. Second operand 57 states and 30212 transitions. [2022-11-02 20:50:48,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-11-02 20:50:48,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-11-02 20:50:48,273 INFO L231 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-11-02 20:50:48,274 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-11-02 20:50:48,274 INFO L287 CegarLoopForPetriNet]: 592 programPoint places, 82 predicate places. [2022-11-02 20:50:48,274 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-11-02 20:50:48,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:48,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:48,279 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:48,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:48,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:48,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash 540044470, now seen corresponding path program 1 times [2022-11-02 20:50:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:48,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717930992] [2022-11-02 20:50:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:48,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:50:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:50:48,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:50:48,568 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:50:48,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:50:48,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:50:48,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-11-02 20:50:48,569 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:48,570 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:50:48,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-11-02 20:50:48,627 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:50:48,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 621 places, 700 transitions, 1837 flow [2022-11-02 20:50:49,233 INFO L130 PetriNetUnfolder]: 194/1436 cut-off events. [2022-11-02 20:50:49,233 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-11-02 20:50:49,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 1436 events. 194/1436 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5449 event pairs, 0 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 1562. Up to 40 conditions per place. [2022-11-02 20:50:49,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 700 transitions, 1837 flow [2022-11-02 20:50:49,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 621 places, 700 transitions, 1837 flow [2022-11-02 20:50:49,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:49,317 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:49,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:50:49,321 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-02 20:50:49,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:50:49,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:49,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:49,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 620956966, now seen corresponding path program 1 times [2022-11-02 20:50:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377319118] [2022-11-02 20:50:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:49,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377319118] [2022-11-02 20:50:49,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377319118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:49,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:49,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:49,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494128727] [2022-11-02 20:50:49,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:49,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:50:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:50:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:49,341 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 562 out of 700 [2022-11-02 20:50:49,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 700 transitions, 1837 flow. Second operand has 2 states, 2 states have (on average 562.5) internal successors, (1125), 2 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:49,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:49,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 562 of 700 [2022-11-02 20:50:49,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:49,994 INFO L130 PetriNetUnfolder]: 0/1222 cut-off events. [2022-11-02 20:50:49,994 INFO L131 PetriNetUnfolder]: For 1501/1501 co-relation queries the response was YES. [2022-11-02 20:50:49,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1222 events. 0/1222 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5004 event pairs, 0 based on Foata normal form. 1114/2296 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2022-11-02 20:50:49,996 INFO L137 encePairwiseOnDemand]: 582/700 looper letters, 19 selfloop transitions, 0 changer transitions 12/581 dead transitions. [2022-11-02 20:50:49,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 581 transitions, 1637 flow [2022-11-02 20:50:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:50:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:50:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1261 transitions. [2022-11-02 20:50:50,000 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9007142857142857 [2022-11-02 20:50:50,000 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1261 transitions. [2022-11-02 20:50:50,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1261 transitions. [2022-11-02 20:50:50,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:50,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1261 transitions. [2022-11-02 20:50:50,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 630.5) internal successors, (1261), 2 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 700.0) internal successors, (2100), 3 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,002 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 700.0) internal successors, (2100), 3 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,003 INFO L175 Difference]: Start difference. First operand has 621 places, 700 transitions, 1837 flow. Second operand 2 states and 1261 transitions. [2022-11-02 20:50:50,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 581 transitions, 1637 flow [2022-11-02 20:50:50,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 581 transitions, 1295 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:50,011 INFO L231 Difference]: Finished difference. Result has 621 places, 569 transitions, 1233 flow [2022-11-02 20:50:50,011 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1233, PETRI_PLACES=621, PETRI_TRANSITIONS=569} [2022-11-02 20:50:50,011 INFO L287 CegarLoopForPetriNet]: 621 programPoint places, 0 predicate places. [2022-11-02 20:50:50,012 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 569 transitions, 1233 flow [2022-11-02 20:50:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 562.5) internal successors, (1125), 2 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:50,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:50,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-11-02 20:50:50,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 327553959, now seen corresponding path program 1 times [2022-11-02 20:50:50,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:50,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133787817] [2022-11-02 20:50:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:50,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:50,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:50,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133787817] [2022-11-02 20:50:50,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133787817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:50,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:50,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674206297] [2022-11-02 20:50:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:50,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:50:50,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:50:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:50:50,044 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 555 out of 700 [2022-11-02 20:50:50,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 569 transitions, 1233 flow. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:50,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 555 of 700 [2022-11-02 20:50:50,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:50,574 INFO L130 PetriNetUnfolder]: 0/969 cut-off events. [2022-11-02 20:50:50,574 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-02 20:50:50,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 969 events. 0/969 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3336 event pairs, 0 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-11-02 20:50:50,576 INFO L137 encePairwiseOnDemand]: 697/700 looper letters, 28 selfloop transitions, 2 changer transitions 0/573 dead transitions. [2022-11-02 20:50:50,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 573 transitions, 1301 flow [2022-11-02 20:50:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:50:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:50:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1696 transitions. [2022-11-02 20:50:50,630 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8076190476190476 [2022-11-02 20:50:50,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1696 transitions. [2022-11-02 20:50:50,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1696 transitions. [2022-11-02 20:50:50,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:50,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1696 transitions. [2022-11-02 20:50:50,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 565.3333333333334) internal successors, (1696), 3 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) [2022-11-02 20:50:50,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,633 INFO L175 Difference]: Start difference. First operand has 621 places, 569 transitions, 1233 flow. Second operand 3 states and 1696 transitions. [2022-11-02 20:50:50,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 573 transitions, 1301 flow [2022-11-02 20:50:50,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 573 transitions, 1301 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:50:50,639 INFO L231 Difference]: Finished difference. Result has 612 places, 570 transitions, 1245 flow [2022-11-02 20:50:50,640 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1245, PETRI_PLACES=612, PETRI_TRANSITIONS=570} [2022-11-02 20:50:50,640 INFO L287 CegarLoopForPetriNet]: 621 programPoint places, -9 predicate places. [2022-11-02 20:50:50,640 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 570 transitions, 1245 flow [2022-11-02 20:50:50,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:50,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:50,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:50,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-11-02 20:50:50,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash -770945952, now seen corresponding path program 1 times [2022-11-02 20:50:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398853501] [2022-11-02 20:50:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398853501] [2022-11-02 20:50:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398853501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329772379] [2022-11-02 20:50:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:50,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:50,691 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:50,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-02 20:50:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:51,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:51,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329772379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:51,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:51,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:50:51,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005585824] [2022-11-02 20:50:51,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:51,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:50:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:50:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:51,189 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-11-02 20:50:51,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 570 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:51,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-11-02 20:50:51,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:51,758 INFO L130 PetriNetUnfolder]: 0/943 cut-off events. [2022-11-02 20:50:51,758 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-02 20:50:51,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 943 events. 0/943 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3190 event pairs, 0 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-02 20:50:51,760 INFO L137 encePairwiseOnDemand]: 694/700 looper letters, 29 selfloop transitions, 9 changer transitions 0/580 dead transitions. [2022-11-02 20:50:51,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 580 transitions, 1343 flow [2022-11-02 20:50:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5026 transitions. [2022-11-02 20:50:51,765 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7977777777777778 [2022-11-02 20:50:51,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5026 transitions. [2022-11-02 20:50:51,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5026 transitions. [2022-11-02 20:50:51,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:51,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5026 transitions. [2022-11-02 20:50:51,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 558.4444444444445) internal successors, (5026), 9 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,775 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,775 INFO L175 Difference]: Start difference. First operand has 612 places, 570 transitions, 1245 flow. Second operand 9 states and 5026 transitions. [2022-11-02 20:50:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 580 transitions, 1343 flow [2022-11-02 20:50:51,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 580 transitions, 1341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:51,786 INFO L231 Difference]: Finished difference. Result has 622 places, 576 transitions, 1293 flow [2022-11-02 20:50:51,787 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=622, PETRI_TRANSITIONS=576} [2022-11-02 20:50:51,787 INFO L287 CegarLoopForPetriNet]: 621 programPoint places, 1 predicate places. [2022-11-02 20:50:51,787 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 576 transitions, 1293 flow [2022-11-02 20:50:51,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:51,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:51,788 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:51,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:51,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash -707134443, now seen corresponding path program 1 times [2022-11-02 20:50:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:51,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263356393] [2022-11-02 20:50:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:52,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263356393] [2022-11-02 20:50:52,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263356393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:52,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096677264] [2022-11-02 20:50:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:52,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:52,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:52,072 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-02 20:50:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:50:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:52,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:52,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096677264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:52,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:52,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:50:52,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667911213] [2022-11-02 20:50:52,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:52,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:50:52,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:52,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:50:52,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:50:52,669 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-11-02 20:50:52,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 576 transitions, 1293 flow. Second operand has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:52,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:52,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-11-02 20:50:52,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:53,378 INFO L130 PetriNetUnfolder]: 0/891 cut-off events. [2022-11-02 20:50:53,378 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-02 20:50:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 891 events. 0/891 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2839 event pairs, 0 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-02 20:50:53,380 INFO L137 encePairwiseOnDemand]: 694/700 looper letters, 37 selfloop transitions, 21 changer transitions 0/600 dead transitions. [2022-11-02 20:50:53,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 600 transitions, 1517 flow [2022-11-02 20:50:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:50:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:50:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11696 transitions. [2022-11-02 20:50:53,388 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7956462585034013 [2022-11-02 20:50:53,388 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11696 transitions. [2022-11-02 20:50:53,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11696 transitions. [2022-11-02 20:50:53,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:53,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11696 transitions. [2022-11-02 20:50:53,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 556.952380952381) internal successors, (11696), 21 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,406 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,406 INFO L175 Difference]: Start difference. First operand has 622 places, 576 transitions, 1293 flow. Second operand 21 states and 11696 transitions. [2022-11-02 20:50:53,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 600 transitions, 1517 flow [2022-11-02 20:50:53,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 600 transitions, 1503 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:53,416 INFO L231 Difference]: Finished difference. Result has 646 places, 589 transitions, 1417 flow [2022-11-02 20:50:53,416 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1417, PETRI_PLACES=646, PETRI_TRANSITIONS=589} [2022-11-02 20:50:53,417 INFO L287 CegarLoopForPetriNet]: 621 programPoint places, 25 predicate places. [2022-11-02 20:50:53,417 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 589 transitions, 1417 flow [2022-11-02 20:50:53,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:53,419 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:53,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-02 20:50:53,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-11-02 20:50:53,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash 865014155, now seen corresponding path program 1 times [2022-11-02 20:50:53,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:53,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317875687] [2022-11-02 20:50:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:53,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317875687] [2022-11-02 20:50:53,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317875687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997590635] [2022-11-02 20:50:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:53,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:53,894 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:53,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-02 20:50:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:54,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:54,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997590635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:54,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:54,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:50:54,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876229203] [2022-11-02 20:50:54,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:54,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:54,779 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-11-02 20:50:54,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 589 transitions, 1417 flow. Second operand has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:54,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:54,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-11-02 20:50:54,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:55,794 INFO L130 PetriNetUnfolder]: 0/787 cut-off events. [2022-11-02 20:50:55,794 INFO L131 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-11-02 20:50:55,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 787 events. 0/787 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2155 event pairs, 0 based on Foata normal form. 8/795 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-02 20:50:55,796 INFO L137 encePairwiseOnDemand]: 694/700 looper letters, 53 selfloop transitions, 45 changer transitions 0/640 dead transitions. [2022-11-02 20:50:55,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 640 transitions, 1929 flow [2022-11-02 20:50:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:50:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:50:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 25036 transitions. [2022-11-02 20:50:55,808 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7947936507936508 [2022-11-02 20:50:55,808 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 25036 transitions. [2022-11-02 20:50:55,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 25036 transitions. [2022-11-02 20:50:55,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:55,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 25036 transitions. [2022-11-02 20:50:55,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 556.3555555555556) internal successors, (25036), 45 states have internal predecessors, (25036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,844 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,844 INFO L175 Difference]: Start difference. First operand has 646 places, 589 transitions, 1417 flow. Second operand 45 states and 25036 transitions. [2022-11-02 20:50:55,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 640 transitions, 1929 flow [2022-11-02 20:50:55,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 640 transitions, 1889 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:50:55,855 INFO L231 Difference]: Finished difference. Result has 693 places, 614 transitions, 1695 flow [2022-11-02 20:50:55,855 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1695, PETRI_PLACES=693, PETRI_TRANSITIONS=614} [2022-11-02 20:50:55,855 INFO L287 CegarLoopForPetriNet]: 621 programPoint places, 72 predicate places. [2022-11-02 20:50:55,856 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 614 transitions, 1695 flow [2022-11-02 20:50:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:55,858 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:55,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-11-02 20:50:56,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:50:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1247181991, now seen corresponding path program 1 times [2022-11-02 20:50:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119438787] [2022-11-02 20:50:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:56,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:56,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:56,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119438787] [2022-11-02 20:50:56,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119438787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:56,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532931012] [2022-11-02 20:50:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:56,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:56,815 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:56,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-02 20:50:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:50:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:57,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532931012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:58,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:58,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:50:58,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636980114] [2022-11-02 20:50:58,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:58,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:50:58,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:50:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:50:58,584 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-11-02 20:50:58,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 614 transitions, 1695 flow. Second operand has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:58,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:58,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-11-02 20:50:58,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:00,040 INFO L130 PetriNetUnfolder]: 0/722 cut-off events. [2022-11-02 20:51:00,040 INFO L131 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-11-02 20:51:00,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-11-02 20:51:00,042 INFO L137 encePairwiseOnDemand]: 695/700 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-11-02 20:51:00,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 648 transitions, 2197 flow [2022-11-02 20:51:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:51:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-02 20:51:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33363 transitions. [2022-11-02 20:51:00,061 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7943571428571429 [2022-11-02 20:51:00,061 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33363 transitions. [2022-11-02 20:51:00,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33363 transitions. [2022-11-02 20:51:00,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:00,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33363 transitions. [2022-11-02 20:51:00,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 556.05) internal successors, (33363), 60 states have internal predecessors, (33363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:00,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:00,110 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:00,110 INFO L175 Difference]: Start difference. First operand has 693 places, 614 transitions, 1695 flow. Second operand 60 states and 33363 transitions. [2022-11-02 20:51:00,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 648 transitions, 2197 flow [2022-11-02 20:51:00,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-11-02 20:51:00,122 INFO L231 Difference]: Finished difference. Result has 706 places, 613 transitions, 1735 flow [2022-11-02 20:51:00,122 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=706, PETRI_TRANSITIONS=613} [2022-11-02 20:51:00,122 INFO L287 CegarLoopForPetriNet]: 621 programPoint places, 85 predicate places. [2022-11-02 20:51:00,123 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 613 transitions, 1735 flow [2022-11-02 20:51:00,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:00,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:00,127 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:00,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-02 20:51:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-11-02 20:51:00,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1309795873, now seen corresponding path program 1 times [2022-11-02 20:51:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754500110] [2022-11-02 20:51:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:00,357 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:51:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:00,415 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:51:00,415 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:51:00,415 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:51:00,415 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:51:00,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-11-02 20:51:00,416 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:00,416 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:51:00,416 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-11-02 20:51:00,480 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:51:00,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 650 places, 733 transitions, 1946 flow [2022-11-02 20:51:01,349 INFO L130 PetriNetUnfolder]: 204/1508 cut-off events. [2022-11-02 20:51:01,349 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-11-02 20:51:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 1508 events. 204/1508 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5713 event pairs, 0 based on Foata normal form. 0/1262 useless extension candidates. Maximal degree in co-relation 1656. Up to 42 conditions per place. [2022-11-02 20:51:01,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 650 places, 733 transitions, 1946 flow [2022-11-02 20:51:01,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 650 places, 733 transitions, 1946 flow [2022-11-02 20:51:01,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:01,411 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:01,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:51:01,416 INFO L130 PetriNetUnfolder]: 4/91 cut-off events. [2022-11-02 20:51:01,416 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:51:01,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:01,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:01,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:01,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2053273849, now seen corresponding path program 1 times [2022-11-02 20:51:01,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:01,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923672378] [2022-11-02 20:51:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:01,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923672378] [2022-11-02 20:51:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923672378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:01,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:01,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698165882] [2022-11-02 20:51:01,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:01,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:01,441 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 581 out of 733 [2022-11-02 20:51:01,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 733 transitions, 1946 flow. Second operand has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:01,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:01,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 581 of 733 [2022-11-02 20:51:01,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:02,236 INFO L130 PetriNetUnfolder]: 0/1258 cut-off events. [2022-11-02 20:51:02,236 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-11-02 20:51:02,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 1258 events. 0/1258 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5235 event pairs, 0 based on Foata normal form. 6845/8063 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-11-02 20:51:02,238 INFO L137 encePairwiseOnDemand]: 606/733 looper letters, 29 selfloop transitions, 2 changer transitions 12/612 dead transitions. [2022-11-02 20:51:02,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 612 transitions, 1766 flow [2022-11-02 20:51:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1906 transitions. [2022-11-02 20:51:02,241 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8667576170986813 [2022-11-02 20:51:02,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1906 transitions. [2022-11-02 20:51:02,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1906 transitions. [2022-11-02 20:51:02,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:02,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1906 transitions. [2022-11-02 20:51:02,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 635.3333333333334) internal successors, (1906), 3 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:02,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:02,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:02,244 INFO L175 Difference]: Start difference. First operand has 650 places, 733 transitions, 1946 flow. Second operand 3 states and 1906 transitions. [2022-11-02 20:51:02,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 612 transitions, 1766 flow [2022-11-02 20:51:02,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 612 transitions, 1386 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:02,252 INFO L231 Difference]: Finished difference. Result has 652 places, 597 transitions, 1304 flow [2022-11-02 20:51:02,252 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1304, PETRI_PLACES=652, PETRI_TRANSITIONS=597} [2022-11-02 20:51:02,253 INFO L287 CegarLoopForPetriNet]: 650 programPoint places, 2 predicate places. [2022-11-02 20:51:02,253 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 597 transitions, 1304 flow [2022-11-02 20:51:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:02,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:02,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-11-02 20:51:02,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 208730624, now seen corresponding path program 1 times [2022-11-02 20:51:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:02,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619886617] [2022-11-02 20:51:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619886617] [2022-11-02 20:51:02,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619886617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055904839] [2022-11-02 20:51:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:02,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:02,310 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:02,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-02 20:51:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:51:02,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:02,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:02,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055904839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:02,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:02,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:51:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411860945] [2022-11-02 20:51:02,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:51:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:51:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:51:02,843 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-11-02 20:51:02,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 597 transitions, 1304 flow. Second operand has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:02,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:02,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-11-02 20:51:02,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:03,550 INFO L130 PetriNetUnfolder]: 0/992 cut-off events. [2022-11-02 20:51:03,550 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:51:03,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 992 events. 0/992 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3363 event pairs, 0 based on Foata normal form. 2/994 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-02 20:51:03,552 INFO L137 encePairwiseOnDemand]: 727/733 looper letters, 30 selfloop transitions, 9 changer transitions 0/607 dead transitions. [2022-11-02 20:51:03,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 607 transitions, 1404 flow [2022-11-02 20:51:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:51:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:51:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5261 transitions. [2022-11-02 20:51:03,557 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7974837047142641 [2022-11-02 20:51:03,557 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5261 transitions. [2022-11-02 20:51:03,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5261 transitions. [2022-11-02 20:51:03,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:03,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5261 transitions. [2022-11-02 20:51:03,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 584.5555555555555) internal successors, (5261), 9 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:03,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:03,633 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:03,633 INFO L175 Difference]: Start difference. First operand has 652 places, 597 transitions, 1304 flow. Second operand 9 states and 5261 transitions. [2022-11-02 20:51:03,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 607 transitions, 1404 flow [2022-11-02 20:51:03,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 607 transitions, 1402 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:03,640 INFO L231 Difference]: Finished difference. Result has 650 places, 603 transitions, 1352 flow [2022-11-02 20:51:03,640 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=650, PETRI_TRANSITIONS=603} [2022-11-02 20:51:03,641 INFO L287 CegarLoopForPetriNet]: 650 programPoint places, 0 predicate places. [2022-11-02 20:51:03,641 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 603 transitions, 1352 flow [2022-11-02 20:51:03,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:03,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:03,642 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:03,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-02 20:51:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-11-02 20:51:03,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash 329362997, now seen corresponding path program 1 times [2022-11-02 20:51:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:03,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908802459] [2022-11-02 20:51:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:03,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908802459] [2022-11-02 20:51:03,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908802459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385833362] [2022-11-02 20:51:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:03,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:03,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:03,926 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:03,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-02 20:51:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:51:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:04,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:04,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385833362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:04,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:04,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:51:04,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744647025] [2022-11-02 20:51:04,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:04,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:51:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:51:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:51:04,546 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-11-02 20:51:04,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 603 transitions, 1352 flow. Second operand has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:04,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:04,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-11-02 20:51:04,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:05,359 INFO L130 PetriNetUnfolder]: 0/940 cut-off events. [2022-11-02 20:51:05,360 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-02 20:51:05,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 940 events. 0/940 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3025 event pairs, 0 based on Foata normal form. 4/944 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-02 20:51:05,363 INFO L137 encePairwiseOnDemand]: 727/733 looper letters, 38 selfloop transitions, 21 changer transitions 0/627 dead transitions. [2022-11-02 20:51:05,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 627 transitions, 1578 flow [2022-11-02 20:51:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:51:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:51:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12243 transitions. [2022-11-02 20:51:05,375 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7953615279672579 [2022-11-02 20:51:05,375 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12243 transitions. [2022-11-02 20:51:05,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12243 transitions. [2022-11-02 20:51:05,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:05,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12243 transitions. [2022-11-02 20:51:05,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:05,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:05,396 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:05,396 INFO L175 Difference]: Start difference. First operand has 650 places, 603 transitions, 1352 flow. Second operand 21 states and 12243 transitions. [2022-11-02 20:51:05,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 627 transitions, 1578 flow [2022-11-02 20:51:05,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 627 transitions, 1564 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:05,404 INFO L231 Difference]: Finished difference. Result has 674 places, 616 transitions, 1476 flow [2022-11-02 20:51:05,405 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1476, PETRI_PLACES=674, PETRI_TRANSITIONS=616} [2022-11-02 20:51:05,405 INFO L287 CegarLoopForPetriNet]: 650 programPoint places, 24 predicate places. [2022-11-02 20:51:05,405 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 616 transitions, 1476 flow [2022-11-02 20:51:05,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:05,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:05,407 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:05,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:05,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:05,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash 179244203, now seen corresponding path program 1 times [2022-11-02 20:51:05,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:05,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417080727] [2022-11-02 20:51:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:05,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417080727] [2022-11-02 20:51:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417080727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515585220] [2022-11-02 20:51:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:05,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:05,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:05,839 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:05,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-02 20:51:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:06,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:51:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:06,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:06,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515585220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:06,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:06,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:51:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053257078] [2022-11-02 20:51:06,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:51:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:51:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:51:06,806 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-11-02 20:51:06,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 616 transitions, 1476 flow. Second operand has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:06,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:06,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-11-02 20:51:06,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:08,066 INFO L130 PetriNetUnfolder]: 0/836 cut-off events. [2022-11-02 20:51:08,066 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-11-02 20:51:08,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 836 events. 0/836 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2343 event pairs, 0 based on Foata normal form. 8/844 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-11-02 20:51:08,068 INFO L137 encePairwiseOnDemand]: 727/733 looper letters, 54 selfloop transitions, 45 changer transitions 0/667 dead transitions. [2022-11-02 20:51:08,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 667 transitions, 1990 flow [2022-11-02 20:51:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:51:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:51:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26207 transitions. [2022-11-02 20:51:08,083 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7945126572684553 [2022-11-02 20:51:08,083 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26207 transitions. [2022-11-02 20:51:08,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26207 transitions. [2022-11-02 20:51:08,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:08,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26207 transitions. [2022-11-02 20:51:08,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 582.3777777777777) internal successors, (26207), 45 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:08,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:08,125 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:08,125 INFO L175 Difference]: Start difference. First operand has 674 places, 616 transitions, 1476 flow. Second operand 45 states and 26207 transitions. [2022-11-02 20:51:08,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 667 transitions, 1990 flow [2022-11-02 20:51:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 667 transitions, 1950 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:51:08,135 INFO L231 Difference]: Finished difference. Result has 721 places, 641 transitions, 1754 flow [2022-11-02 20:51:08,136 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1754, PETRI_PLACES=721, PETRI_TRANSITIONS=641} [2022-11-02 20:51:08,136 INFO L287 CegarLoopForPetriNet]: 650 programPoint places, 71 predicate places. [2022-11-02 20:51:08,136 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 641 transitions, 1754 flow [2022-11-02 20:51:08,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:08,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:08,139 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:08,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-02 20:51:08,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-11-02 20:51:08,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash -235927097, now seen corresponding path program 1 times [2022-11-02 20:51:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:08,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166302593] [2022-11-02 20:51:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:08,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:08,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166302593] [2022-11-02 20:51:08,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166302593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659460709] [2022-11-02 20:51:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:08,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:08,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:08,970 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:08,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-02 20:51:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:09,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:51:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659460709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:10,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:10,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:51:10,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41927512] [2022-11-02 20:51:10,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:10,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:51:10,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:51:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:51:11,027 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-11-02 20:51:11,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 641 transitions, 1754 flow. Second operand has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:11,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:11,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-11-02 20:51:11,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:12,797 INFO L130 PetriNetUnfolder]: 0/758 cut-off events. [2022-11-02 20:51:12,797 INFO L131 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-11-02 20:51:12,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-02 20:51:12,799 INFO L137 encePairwiseOnDemand]: 728/733 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-11-02 20:51:12,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 680 transitions, 2312 flow [2022-11-02 20:51:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:51:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-02 20:51:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36670 transitions. [2022-11-02 20:51:12,832 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.794083890946101 [2022-11-02 20:51:12,832 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36670 transitions. [2022-11-02 20:51:12,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36670 transitions. [2022-11-02 20:51:12,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:12,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36670 transitions. [2022-11-02 20:51:12,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 582.063492063492) internal successors, (36670), 63 states have internal predecessors, (36670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:12,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:12,917 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:12,917 INFO L175 Difference]: Start difference. First operand has 721 places, 641 transitions, 1754 flow. Second operand 63 states and 36670 transitions. [2022-11-02 20:51:12,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 680 transitions, 2312 flow [2022-11-02 20:51:12,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-11-02 20:51:12,932 INFO L231 Difference]: Finished difference. Result has 737 places, 643 transitions, 1823 flow [2022-11-02 20:51:12,932 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=737, PETRI_TRANSITIONS=643} [2022-11-02 20:51:12,932 INFO L287 CegarLoopForPetriNet]: 650 programPoint places, 87 predicate places. [2022-11-02 20:51:12,933 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 643 transitions, 1823 flow [2022-11-02 20:51:12,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:12,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:12,936 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:12,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-02 20:51:13,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-11-02 20:51:13,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1626237267, now seen corresponding path program 1 times [2022-11-02 20:51:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372599223] [2022-11-02 20:51:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:13,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:51:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:13,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:51:13,260 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:51:13,260 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:51:13,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:51:13,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-11-02 20:51:13,260 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:51:13,261 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:51:13,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-11-02 20:51:13,329 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:51:13,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 679 places, 766 transitions, 2057 flow [2022-11-02 20:51:14,317 INFO L130 PetriNetUnfolder]: 214/1580 cut-off events. [2022-11-02 20:51:14,317 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-11-02 20:51:14,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 1580 events. 214/1580 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5997 event pairs, 0 based on Foata normal form. 0/1322 useless extension candidates. Maximal degree in co-relation 1751. Up to 44 conditions per place. [2022-11-02 20:51:14,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 679 places, 766 transitions, 2057 flow [2022-11-02 20:51:14,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 766 transitions, 2057 flow [2022-11-02 20:51:14,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:14,471 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:14,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:51:14,476 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-02 20:51:14,476 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:51:14,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:14,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:14,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1892805318, now seen corresponding path program 1 times [2022-11-02 20:51:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:14,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343103807] [2022-11-02 20:51:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:14,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343103807] [2022-11-02 20:51:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343103807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:14,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998359567] [2022-11-02 20:51:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:14,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:51:14,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:51:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:51:14,494 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 614 out of 766 [2022-11-02 20:51:14,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 766 transitions, 2057 flow. Second operand has 2 states, 2 states have (on average 614.5) internal successors, (1229), 2 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:14,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:14,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 614 of 766 [2022-11-02 20:51:14,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:15,287 INFO L130 PetriNetUnfolder]: 0/1344 cut-off events. [2022-11-02 20:51:15,288 INFO L131 PetriNetUnfolder]: For 1981/1981 co-relation queries the response was YES. [2022-11-02 20:51:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 1344 events. 0/1344 cut-off events. For 1981/1981 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5604 event pairs, 0 based on Foata normal form. 1356/2656 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2022-11-02 20:51:15,290 INFO L137 encePairwiseOnDemand]: 636/766 looper letters, 21 selfloop transitions, 0 changer transitions 12/635 dead transitions. [2022-11-02 20:51:15,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 635 transitions, 1837 flow [2022-11-02 20:51:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:51:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:51:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1379 transitions. [2022-11-02 20:51:15,292 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9001305483028721 [2022-11-02 20:51:15,292 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1379 transitions. [2022-11-02 20:51:15,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1379 transitions. [2022-11-02 20:51:15,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:15,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1379 transitions. [2022-11-02 20:51:15,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 689.5) internal successors, (1379), 2 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:15,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 766.0) internal successors, (2298), 3 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:15,295 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 766.0) internal successors, (2298), 3 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:15,295 INFO L175 Difference]: Start difference. First operand has 679 places, 766 transitions, 2057 flow. Second operand 2 states and 1379 transitions. [2022-11-02 20:51:15,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 635 transitions, 1837 flow [2022-11-02 20:51:15,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 635 transitions, 1417 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:15,303 INFO L231 Difference]: Finished difference. Result has 679 places, 623 transitions, 1351 flow [2022-11-02 20:51:15,303 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1351, PETRI_PLACES=679, PETRI_TRANSITIONS=623} [2022-11-02 20:51:15,303 INFO L287 CegarLoopForPetriNet]: 679 programPoint places, 0 predicate places. [2022-11-02 20:51:15,303 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 623 transitions, 1351 flow [2022-11-02 20:51:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 614.5) internal successors, (1229), 2 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:15,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:15,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:15,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-11-02 20:51:15,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1599402311, now seen corresponding path program 1 times [2022-11-02 20:51:15,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:15,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493834738] [2022-11-02 20:51:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:15,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:15,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:15,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493834738] [2022-11-02 20:51:15,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493834738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:15,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:15,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:15,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780807442] [2022-11-02 20:51:15,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:15,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:15,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:15,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:15,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:15,334 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 607 out of 766 [2022-11-02 20:51:15,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 623 transitions, 1351 flow. Second operand has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:15,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:15,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 607 of 766 [2022-11-02 20:51:15,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:16,107 INFO L130 PetriNetUnfolder]: 0/1067 cut-off events. [2022-11-02 20:51:16,108 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-02 20:51:16,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 1067 events. 0/1067 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3703 event pairs, 0 based on Foata normal form. 0/1046 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-11-02 20:51:16,110 INFO L137 encePairwiseOnDemand]: 763/766 looper letters, 30 selfloop transitions, 2 changer transitions 0/627 dead transitions. [2022-11-02 20:51:16,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 627 transitions, 1423 flow [2022-11-02 20:51:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1854 transitions. [2022-11-02 20:51:16,113 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8067885117493473 [2022-11-02 20:51:16,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1854 transitions. [2022-11-02 20:51:16,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1854 transitions. [2022-11-02 20:51:16,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:16,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1854 transitions. [2022-11-02 20:51:16,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 618.0) internal successors, (1854), 3 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,119 INFO L175 Difference]: Start difference. First operand has 679 places, 623 transitions, 1351 flow. Second operand 3 states and 1854 transitions. [2022-11-02 20:51:16,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 627 transitions, 1423 flow [2022-11-02 20:51:16,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 627 transitions, 1423 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:16,132 INFO L231 Difference]: Finished difference. Result has 670 places, 624 transitions, 1363 flow [2022-11-02 20:51:16,133 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1363, PETRI_PLACES=670, PETRI_TRANSITIONS=624} [2022-11-02 20:51:16,133 INFO L287 CegarLoopForPetriNet]: 679 programPoint places, -9 predicate places. [2022-11-02 20:51:16,134 INFO L495 AbstractCegarLoop]: Abstraction has has 670 places, 624 transitions, 1363 flow [2022-11-02 20:51:16,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:16,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:16,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-11-02 20:51:16,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:16,135 INFO L85 PathProgramCache]: Analyzing trace with hash 163924768, now seen corresponding path program 1 times [2022-11-02 20:51:16,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057383562] [2022-11-02 20:51:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:16,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:16,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057383562] [2022-11-02 20:51:16,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057383562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155405830] [2022-11-02 20:51:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:16,185 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:16,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-02 20:51:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:51:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:16,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155405830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:16,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:16,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:51:16,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696684468] [2022-11-02 20:51:16,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:16,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:51:16,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:51:16,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:51:16,802 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-11-02 20:51:16,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 624 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:16,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-11-02 20:51:16,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:17,647 INFO L130 PetriNetUnfolder]: 0/1041 cut-off events. [2022-11-02 20:51:17,647 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-02 20:51:17,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 1041 events. 0/1041 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3549 event pairs, 0 based on Foata normal form. 2/1043 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-02 20:51:17,649 INFO L137 encePairwiseOnDemand]: 760/766 looper letters, 31 selfloop transitions, 9 changer transitions 0/634 dead transitions. [2022-11-02 20:51:17,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 634 transitions, 1465 flow [2022-11-02 20:51:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:51:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:51:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5496 transitions. [2022-11-02 20:51:17,655 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7972149695387293 [2022-11-02 20:51:17,655 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5496 transitions. [2022-11-02 20:51:17,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5496 transitions. [2022-11-02 20:51:17,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:17,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5496 transitions. [2022-11-02 20:51:17,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 610.6666666666666) internal successors, (5496), 9 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:17,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:17,666 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:17,666 INFO L175 Difference]: Start difference. First operand has 670 places, 624 transitions, 1363 flow. Second operand 9 states and 5496 transitions. [2022-11-02 20:51:17,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 634 transitions, 1465 flow [2022-11-02 20:51:17,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 634 transitions, 1463 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:17,675 INFO L231 Difference]: Finished difference. Result has 680 places, 630 transitions, 1411 flow [2022-11-02 20:51:17,676 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=680, PETRI_TRANSITIONS=630} [2022-11-02 20:51:17,676 INFO L287 CegarLoopForPetriNet]: 679 programPoint places, 1 predicate places. [2022-11-02 20:51:17,676 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 630 transitions, 1411 flow [2022-11-02 20:51:17,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:17,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:17,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:17,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-02 20:51:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:17,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -766737131, now seen corresponding path program 1 times [2022-11-02 20:51:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:17,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215841890] [2022-11-02 20:51:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215841890] [2022-11-02 20:51:17,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215841890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575174823] [2022-11-02 20:51:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:17,966 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:17,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-02 20:51:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:51:18,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:18,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575174823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:18,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:18,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:51:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056022910] [2022-11-02 20:51:18,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:18,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:51:18,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:51:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:51:18,656 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-11-02 20:51:18,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 630 transitions, 1411 flow. Second operand has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:18,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:18,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-11-02 20:51:18,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:19,553 INFO L130 PetriNetUnfolder]: 0/989 cut-off events. [2022-11-02 20:51:19,553 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-11-02 20:51:19,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 989 events. 0/989 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3208 event pairs, 0 based on Foata normal form. 4/993 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-02 20:51:19,555 INFO L137 encePairwiseOnDemand]: 760/766 looper letters, 39 selfloop transitions, 21 changer transitions 0/654 dead transitions. [2022-11-02 20:51:19,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 654 transitions, 1639 flow [2022-11-02 20:51:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:51:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:51:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12790 transitions. [2022-11-02 20:51:19,564 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7951013303493721 [2022-11-02 20:51:19,564 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12790 transitions. [2022-11-02 20:51:19,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12790 transitions. [2022-11-02 20:51:19,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:19,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12790 transitions. [2022-11-02 20:51:19,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 609.047619047619) internal successors, (12790), 21 states have internal predecessors, (12790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:19,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:19,582 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:19,582 INFO L175 Difference]: Start difference. First operand has 680 places, 630 transitions, 1411 flow. Second operand 21 states and 12790 transitions. [2022-11-02 20:51:19,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 654 transitions, 1639 flow [2022-11-02 20:51:19,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 654 transitions, 1625 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:19,589 INFO L231 Difference]: Finished difference. Result has 704 places, 643 transitions, 1535 flow [2022-11-02 20:51:19,590 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1535, PETRI_PLACES=704, PETRI_TRANSITIONS=643} [2022-11-02 20:51:19,590 INFO L287 CegarLoopForPetriNet]: 679 programPoint places, 25 predicate places. [2022-11-02 20:51:19,590 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 643 transitions, 1535 flow [2022-11-02 20:51:19,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:19,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:19,592 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:19,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-02 20:51:19,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-11-02 20:51:19,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1338101515, now seen corresponding path program 1 times [2022-11-02 20:51:19,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:19,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637109996] [2022-11-02 20:51:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:19,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:19,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637109996] [2022-11-02 20:51:19,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637109996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:20,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641387928] [2022-11-02 20:51:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:20,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:20,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:20,001 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:20,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-02 20:51:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:20,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:51:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:20,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:20,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641387928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:20,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:20,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:51:20,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454331143] [2022-11-02 20:51:20,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:20,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:51:20,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:51:20,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:51:20,968 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-11-02 20:51:20,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 643 transitions, 1535 flow. Second operand has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:20,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:20,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-11-02 20:51:20,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:22,266 INFO L130 PetriNetUnfolder]: 0/885 cut-off events. [2022-11-02 20:51:22,266 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-11-02 20:51:22,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 885 events. 0/885 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2524 event pairs, 0 based on Foata normal form. 8/893 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-02 20:51:22,269 INFO L137 encePairwiseOnDemand]: 760/766 looper letters, 55 selfloop transitions, 45 changer transitions 0/694 dead transitions. [2022-11-02 20:51:22,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 694 transitions, 2051 flow [2022-11-02 20:51:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:51:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:51:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27378 transitions. [2022-11-02 20:51:22,290 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7942558746736292 [2022-11-02 20:51:22,290 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27378 transitions. [2022-11-02 20:51:22,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27378 transitions. [2022-11-02 20:51:22,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:22,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27378 transitions. [2022-11-02 20:51:22,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 608.4) internal successors, (27378), 45 states have internal predecessors, (27378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,350 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,351 INFO L175 Difference]: Start difference. First operand has 704 places, 643 transitions, 1535 flow. Second operand 45 states and 27378 transitions. [2022-11-02 20:51:22,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 694 transitions, 2051 flow [2022-11-02 20:51:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 694 transitions, 2011 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:51:22,363 INFO L231 Difference]: Finished difference. Result has 751 places, 668 transitions, 1813 flow [2022-11-02 20:51:22,364 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1813, PETRI_PLACES=751, PETRI_TRANSITIONS=668} [2022-11-02 20:51:22,364 INFO L287 CegarLoopForPetriNet]: 679 programPoint places, 72 predicate places. [2022-11-02 20:51:22,364 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 668 transitions, 1813 flow [2022-11-02 20:51:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:22,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:22,367 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:22,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:22,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:22,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash 553526055, now seen corresponding path program 1 times [2022-11-02 20:51:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:22,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058300800] [2022-11-02 20:51:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:22,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:23,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:23,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058300800] [2022-11-02 20:51:23,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058300800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:23,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697985474] [2022-11-02 20:51:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:23,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:23,303 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:23,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-02 20:51:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:51:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:24,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:25,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697985474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:25,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:25,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:51:25,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140132180] [2022-11-02 20:51:25,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:25,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:51:25,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:51:25,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:51:25,072 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-11-02 20:51:25,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 668 transitions, 1813 flow. Second operand has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:25,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:25,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-11-02 20:51:25,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:26,813 INFO L130 PetriNetUnfolder]: 0/794 cut-off events. [2022-11-02 20:51:26,813 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-11-02 20:51:26,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-11-02 20:51:26,815 INFO L137 encePairwiseOnDemand]: 761/766 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-11-02 20:51:26,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 712 transitions, 2427 flow [2022-11-02 20:51:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-02 20:51:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-02 20:51:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 40133 transitions. [2022-11-02 20:51:26,838 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7938325816915895 [2022-11-02 20:51:26,838 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 40133 transitions. [2022-11-02 20:51:26,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 40133 transitions. [2022-11-02 20:51:26,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:26,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 40133 transitions. [2022-11-02 20:51:26,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 608.0757575757576) internal successors, (40133), 66 states have internal predecessors, (40133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:26,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:26,919 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:26,919 INFO L175 Difference]: Start difference. First operand has 751 places, 668 transitions, 1813 flow. Second operand 66 states and 40133 transitions. [2022-11-02 20:51:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 712 transitions, 2427 flow [2022-11-02 20:51:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-11-02 20:51:26,930 INFO L231 Difference]: Finished difference. Result has 770 places, 673 transitions, 1911 flow [2022-11-02 20:51:26,930 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=770, PETRI_TRANSITIONS=673} [2022-11-02 20:51:26,931 INFO L287 CegarLoopForPetriNet]: 679 programPoint places, 91 predicate places. [2022-11-02 20:51:26,931 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 673 transitions, 1911 flow [2022-11-02 20:51:26,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:26,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:26,936 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:26,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-02 20:51:27,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:27,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:27,137 INFO L85 PathProgramCache]: Analyzing trace with hash -243572998, now seen corresponding path program 1 times [2022-11-02 20:51:27,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:27,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381736351] [2022-11-02 20:51:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:27,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:51:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:27,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:51:27,249 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:51:27,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:51:27,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:51:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-11-02 20:51:27,250 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:27,252 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:51:27,252 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-11-02 20:51:27,331 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:51:27,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 708 places, 799 transitions, 2170 flow [2022-11-02 20:51:28,188 INFO L130 PetriNetUnfolder]: 224/1652 cut-off events. [2022-11-02 20:51:28,188 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-11-02 20:51:28,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 1652 events. 224/1652 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6263 event pairs, 0 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 1847. Up to 46 conditions per place. [2022-11-02 20:51:28,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 708 places, 799 transitions, 2170 flow [2022-11-02 20:51:28,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 708 places, 799 transitions, 2170 flow [2022-11-02 20:51:28,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:28,304 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:28,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:51:28,312 INFO L130 PetriNetUnfolder]: 5/94 cut-off events. [2022-11-02 20:51:28,313 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:51:28,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:28,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:28,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1305916442, now seen corresponding path program 1 times [2022-11-02 20:51:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897732159] [2022-11-02 20:51:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897732159] [2022-11-02 20:51:28,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897732159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:28,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:28,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453771942] [2022-11-02 20:51:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:28,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:51:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:51:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:51:28,338 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 640 out of 799 [2022-11-02 20:51:28,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 799 transitions, 2170 flow. Second operand has 2 states, 2 states have (on average 640.5) internal successors, (1281), 2 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:28,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:28,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 640 of 799 [2022-11-02 20:51:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:29,244 INFO L130 PetriNetUnfolder]: 0/1405 cut-off events. [2022-11-02 20:51:29,244 INFO L131 PetriNetUnfolder]: For 2255/2255 co-relation queries the response was YES. [2022-11-02 20:51:29,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 1405 events. 0/1405 cut-off events. For 2255/2255 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5809 event pairs, 0 based on Foata normal form. 1486/2845 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-02 20:51:29,247 INFO L137 encePairwiseOnDemand]: 663/799 looper letters, 22 selfloop transitions, 0 changer transitions 12/662 dead transitions. [2022-11-02 20:51:29,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 662 transitions, 1940 flow [2022-11-02 20:51:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:51:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:51:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1438 transitions. [2022-11-02 20:51:29,249 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.899874843554443 [2022-11-02 20:51:29,249 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1438 transitions. [2022-11-02 20:51:29,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1438 transitions. [2022-11-02 20:51:29,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:29,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1438 transitions. [2022-11-02 20:51:29,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 719.0) internal successors, (1438), 2 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:29,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 799.0) internal successors, (2397), 3 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) [2022-11-02 20:51:29,252 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 799.0) internal successors, (2397), 3 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) [2022-11-02 20:51:29,252 INFO L175 Difference]: Start difference. First operand has 708 places, 799 transitions, 2170 flow. Second operand 2 states and 1438 transitions. [2022-11-02 20:51:29,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 662 transitions, 1940 flow [2022-11-02 20:51:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 662 transitions, 1478 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:29,261 INFO L231 Difference]: Finished difference. Result has 708 places, 650 transitions, 1410 flow [2022-11-02 20:51:29,261 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1410, PETRI_PLACES=708, PETRI_TRANSITIONS=650} [2022-11-02 20:51:29,262 INFO L287 CegarLoopForPetriNet]: 708 programPoint places, 0 predicate places. [2022-11-02 20:51:29,262 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 650 transitions, 1410 flow [2022-11-02 20:51:29,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 640.5) internal successors, (1281), 2 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:29,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:29,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:29,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-11-02 20:51:29,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1599319449, now seen corresponding path program 1 times [2022-11-02 20:51:29,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:29,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572141952] [2022-11-02 20:51:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:29,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:29,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:29,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572141952] [2022-11-02 20:51:29,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572141952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:29,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:29,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:29,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900200517] [2022-11-02 20:51:29,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:29,289 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 633 out of 799 [2022-11-02 20:51:29,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 650 transitions, 1410 flow. Second operand has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:29,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:29,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 633 of 799 [2022-11-02 20:51:29,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:30,100 INFO L130 PetriNetUnfolder]: 0/1116 cut-off events. [2022-11-02 20:51:30,100 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-02 20:51:30,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1343 conditions, 1116 events. 0/1116 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3881 event pairs, 0 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-11-02 20:51:30,102 INFO L137 encePairwiseOnDemand]: 796/799 looper letters, 31 selfloop transitions, 2 changer transitions 0/654 dead transitions. [2022-11-02 20:51:30,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 654 transitions, 1484 flow [2022-11-02 20:51:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1933 transitions. [2022-11-02 20:51:30,104 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8064246975385899 [2022-11-02 20:51:30,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1933 transitions. [2022-11-02 20:51:30,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1933 transitions. [2022-11-02 20:51:30,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:30,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1933 transitions. [2022-11-02 20:51:30,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,108 INFO L175 Difference]: Start difference. First operand has 708 places, 650 transitions, 1410 flow. Second operand 3 states and 1933 transitions. [2022-11-02 20:51:30,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 654 transitions, 1484 flow [2022-11-02 20:51:30,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 654 transitions, 1484 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:30,114 INFO L231 Difference]: Finished difference. Result has 699 places, 651 transitions, 1422 flow [2022-11-02 20:51:30,114 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1422, PETRI_PLACES=699, PETRI_TRANSITIONS=651} [2022-11-02 20:51:30,115 INFO L287 CegarLoopForPetriNet]: 708 programPoint places, -9 predicate places. [2022-11-02 20:51:30,115 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 651 transitions, 1422 flow [2022-11-02 20:51:30,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:30,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:30,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-11-02 20:51:30,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash -905363520, now seen corresponding path program 1 times [2022-11-02 20:51:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558961738] [2022-11-02 20:51:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558961738] [2022-11-02 20:51:30,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558961738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136672870] [2022-11-02 20:51:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:30,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:30,168 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:30,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-02 20:51:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:30,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:51:30,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:30,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:30,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136672870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:30,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:30,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:51:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396741286] [2022-11-02 20:51:30,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:51:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:51:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:51:30,760 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-11-02 20:51:30,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 651 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:30,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:30,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-11-02 20:51:30,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:31,576 INFO L130 PetriNetUnfolder]: 0/1090 cut-off events. [2022-11-02 20:51:31,577 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 20:51:31,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 1090 events. 0/1090 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3730 event pairs, 0 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-02 20:51:31,579 INFO L137 encePairwiseOnDemand]: 793/799 looper letters, 32 selfloop transitions, 9 changer transitions 0/661 dead transitions. [2022-11-02 20:51:31,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 661 transitions, 1526 flow [2022-11-02 20:51:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:51:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:51:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5731 transitions. [2022-11-02 20:51:31,584 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7969684327631762 [2022-11-02 20:51:31,584 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5731 transitions. [2022-11-02 20:51:31,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5731 transitions. [2022-11-02 20:51:31,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:31,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5731 transitions. [2022-11-02 20:51:31,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 636.7777777777778) internal successors, (5731), 9 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:31,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:31,598 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:31,598 INFO L175 Difference]: Start difference. First operand has 699 places, 651 transitions, 1422 flow. Second operand 9 states and 5731 transitions. [2022-11-02 20:51:31,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 661 transitions, 1526 flow [2022-11-02 20:51:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 661 transitions, 1524 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:31,612 INFO L231 Difference]: Finished difference. Result has 709 places, 657 transitions, 1470 flow [2022-11-02 20:51:31,613 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1470, PETRI_PLACES=709, PETRI_TRANSITIONS=657} [2022-11-02 20:51:31,613 INFO L287 CegarLoopForPetriNet]: 708 programPoint places, 1 predicate places. [2022-11-02 20:51:31,614 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 657 transitions, 1470 flow [2022-11-02 20:51:31,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:31,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:31,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:31,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-02 20:51:31,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:31,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 299532469, now seen corresponding path program 1 times [2022-11-02 20:51:31,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:31,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113001018] [2022-11-02 20:51:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:31,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113001018] [2022-11-02 20:51:31,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113001018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750050640] [2022-11-02 20:51:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:31,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:31,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:31,900 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:31,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-02 20:51:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:51:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:32,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:32,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750050640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:32,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:32,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:51:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272356140] [2022-11-02 20:51:32,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:51:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:51:32,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:51:32,595 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-11-02 20:51:32,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 657 transitions, 1470 flow. Second operand has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:32,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:32,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-11-02 20:51:32,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:33,669 INFO L130 PetriNetUnfolder]: 0/1038 cut-off events. [2022-11-02 20:51:33,669 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-02 20:51:33,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1488 conditions, 1038 events. 0/1038 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3387 event pairs, 0 based on Foata normal form. 4/1042 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-02 20:51:33,672 INFO L137 encePairwiseOnDemand]: 793/799 looper letters, 40 selfloop transitions, 21 changer transitions 0/681 dead transitions. [2022-11-02 20:51:33,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 681 transitions, 1700 flow [2022-11-02 20:51:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:51:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:51:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13337 transitions. [2022-11-02 20:51:33,760 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7948626259014244 [2022-11-02 20:51:33,760 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13337 transitions. [2022-11-02 20:51:33,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13337 transitions. [2022-11-02 20:51:33,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:33,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13337 transitions. [2022-11-02 20:51:33,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 635.0952380952381) internal successors, (13337), 21 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:33,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:33,781 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:33,781 INFO L175 Difference]: Start difference. First operand has 709 places, 657 transitions, 1470 flow. Second operand 21 states and 13337 transitions. [2022-11-02 20:51:33,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 681 transitions, 1700 flow [2022-11-02 20:51:33,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 681 transitions, 1686 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:33,788 INFO L231 Difference]: Finished difference. Result has 733 places, 670 transitions, 1594 flow [2022-11-02 20:51:33,789 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1594, PETRI_PLACES=733, PETRI_TRANSITIONS=670} [2022-11-02 20:51:33,789 INFO L287 CegarLoopForPetriNet]: 708 programPoint places, 25 predicate places. [2022-11-02 20:51:33,789 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 670 transitions, 1594 flow [2022-11-02 20:51:33,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:33,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:33,790 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:33,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-02 20:51:33,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:33,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 46618795, now seen corresponding path program 1 times [2022-11-02 20:51:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:33,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033785505] [2022-11-02 20:51:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:34,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:34,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033785505] [2022-11-02 20:51:34,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033785505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837451424] [2022-11-02 20:51:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:34,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:34,211 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:34,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-02 20:51:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:51:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:34,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:35,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837451424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:35,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:35,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:51:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282986075] [2022-11-02 20:51:35,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:35,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:51:35,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:51:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:51:35,186 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-11-02 20:51:35,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 670 transitions, 1594 flow. Second operand has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:35,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:35,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-11-02 20:51:35,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:36,537 INFO L130 PetriNetUnfolder]: 0/934 cut-off events. [2022-11-02 20:51:36,538 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-02 20:51:36,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 934 events. 0/934 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2711 event pairs, 0 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-11-02 20:51:36,541 INFO L137 encePairwiseOnDemand]: 793/799 looper letters, 56 selfloop transitions, 45 changer transitions 0/721 dead transitions. [2022-11-02 20:51:36,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 721 transitions, 2112 flow [2022-11-02 20:51:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:51:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:51:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28549 transitions. [2022-11-02 20:51:36,558 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7940203031567237 [2022-11-02 20:51:36,558 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28549 transitions. [2022-11-02 20:51:36,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28549 transitions. [2022-11-02 20:51:36,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:36,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28549 transitions. [2022-11-02 20:51:36,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 634.4222222222222) internal successors, (28549), 45 states have internal predecessors, (28549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,612 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,612 INFO L175 Difference]: Start difference. First operand has 733 places, 670 transitions, 1594 flow. Second operand 45 states and 28549 transitions. [2022-11-02 20:51:36,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 721 transitions, 2112 flow [2022-11-02 20:51:36,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 721 transitions, 2072 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:51:36,623 INFO L231 Difference]: Finished difference. Result has 780 places, 695 transitions, 1872 flow [2022-11-02 20:51:36,624 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1872, PETRI_PLACES=780, PETRI_TRANSITIONS=695} [2022-11-02 20:51:36,624 INFO L287 CegarLoopForPetriNet]: 708 programPoint places, 72 predicate places. [2022-11-02 20:51:36,625 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 695 transitions, 1872 flow [2022-11-02 20:51:36,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:36,627 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:36,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-11-02 20:51:36,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash -679425849, now seen corresponding path program 1 times [2022-11-02 20:51:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947288873] [2022-11-02 20:51:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947288873] [2022-11-02 20:51:37,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947288873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886491105] [2022-11-02 20:51:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:37,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:37,566 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:37,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-02 20:51:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:51:38,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:39,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886491105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:39,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:39,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:51:39,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989809930] [2022-11-02 20:51:39,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:39,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:51:39,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:51:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:51:39,412 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-11-02 20:51:39,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 695 transitions, 1872 flow. Second operand has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:39,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-11-02 20:51:39,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:41,338 INFO L130 PetriNetUnfolder]: 0/830 cut-off events. [2022-11-02 20:51:41,338 INFO L131 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-11-02 20:51:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-11-02 20:51:41,340 INFO L137 encePairwiseOnDemand]: 794/799 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-11-02 20:51:41,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 744 transitions, 2542 flow [2022-11-02 20:51:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 20:51:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-02 20:51:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43752 transitions. [2022-11-02 20:51:41,366 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7936006965228275 [2022-11-02 20:51:41,366 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43752 transitions. [2022-11-02 20:51:41,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43752 transitions. [2022-11-02 20:51:41,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:41,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43752 transitions. [2022-11-02 20:51:41,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 634.0869565217391) internal successors, (43752), 69 states have internal predecessors, (43752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,439 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,440 INFO L175 Difference]: Start difference. First operand has 780 places, 695 transitions, 1872 flow. Second operand 69 states and 43752 transitions. [2022-11-02 20:51:41,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 744 transitions, 2542 flow [2022-11-02 20:51:41,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-11-02 20:51:41,454 INFO L231 Difference]: Finished difference. Result has 802 places, 703 transitions, 1999 flow [2022-11-02 20:51:41,454 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=802, PETRI_TRANSITIONS=703} [2022-11-02 20:51:41,455 INFO L287 CegarLoopForPetriNet]: 708 programPoint places, 94 predicate places. [2022-11-02 20:51:41,455 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 703 transitions, 1999 flow [2022-11-02 20:51:41,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:41,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:41,461 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:41,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-02 20:51:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:41,663 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash -153682008, now seen corresponding path program 1 times [2022-11-02 20:51:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458480416] [2022-11-02 20:51:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:41,699 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:51:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:41,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:51:41,769 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:51:41,769 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:51:41,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:51:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-11-02 20:51:41,770 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:41,770 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:51:41,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-11-02 20:51:41,855 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:51:41,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 737 places, 832 transitions, 2285 flow [2022-11-02 20:51:42,893 INFO L130 PetriNetUnfolder]: 234/1724 cut-off events. [2022-11-02 20:51:42,893 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-11-02 20:51:42,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1724 events. 234/1724 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6573 event pairs, 0 based on Foata normal form. 0/1442 useless extension candidates. Maximal degree in co-relation 1944. Up to 48 conditions per place. [2022-11-02 20:51:42,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 737 places, 832 transitions, 2285 flow [2022-11-02 20:51:42,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 737 places, 832 transitions, 2285 flow [2022-11-02 20:51:42,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:43,000 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:43,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:51:43,008 INFO L130 PetriNetUnfolder]: 4/92 cut-off events. [2022-11-02 20:51:43,009 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:51:43,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:43,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:43,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1528865766, now seen corresponding path program 1 times [2022-11-02 20:51:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:43,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225208590] [2022-11-02 20:51:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225208590] [2022-11-02 20:51:43,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225208590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:43,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:43,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:51:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891389478] [2022-11-02 20:51:43,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:43,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:51:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:51:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:51:43,029 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 666 out of 832 [2022-11-02 20:51:43,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 832 transitions, 2285 flow. Second operand has 2 states, 2 states have (on average 666.5) internal successors, (1333), 2 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:43,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 666 of 832 [2022-11-02 20:51:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:43,881 INFO L130 PetriNetUnfolder]: 0/1466 cut-off events. [2022-11-02 20:51:43,882 INFO L131 PetriNetUnfolder]: For 2553/2553 co-relation queries the response was YES. [2022-11-02 20:51:43,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1836 conditions, 1466 events. 0/1466 cut-off events. For 2553/2553 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6089 event pairs, 0 based on Foata normal form. 1622/3040 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-02 20:51:43,884 INFO L137 encePairwiseOnDemand]: 690/832 looper letters, 23 selfloop transitions, 0 changer transitions 12/689 dead transitions. [2022-11-02 20:51:43,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 689 transitions, 2045 flow [2022-11-02 20:51:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:51:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:51:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1497 transitions. [2022-11-02 20:51:43,886 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8996394230769231 [2022-11-02 20:51:43,886 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1497 transitions. [2022-11-02 20:51:43,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1497 transitions. [2022-11-02 20:51:43,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:43,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1497 transitions. [2022-11-02 20:51:43,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 748.5) internal successors, (1497), 2 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 832.0) internal successors, (2496), 3 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,889 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 832.0) internal successors, (2496), 3 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,889 INFO L175 Difference]: Start difference. First operand has 737 places, 832 transitions, 2285 flow. Second operand 2 states and 1497 transitions. [2022-11-02 20:51:43,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 689 transitions, 2045 flow [2022-11-02 20:51:43,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 689 transitions, 1539 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:43,903 INFO L231 Difference]: Finished difference. Result has 737 places, 677 transitions, 1469 flow [2022-11-02 20:51:43,904 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1469, PETRI_PLACES=737, PETRI_TRANSITIONS=677} [2022-11-02 20:51:43,904 INFO L287 CegarLoopForPetriNet]: 737 programPoint places, 0 predicate places. [2022-11-02 20:51:43,904 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 677 transitions, 1469 flow [2022-11-02 20:51:43,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 666.5) internal successors, (1333), 2 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:43,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-11-02 20:51:43,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1235462759, now seen corresponding path program 1 times [2022-11-02 20:51:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:43,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591988192] [2022-11-02 20:51:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591988192] [2022-11-02 20:51:43,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591988192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:43,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:43,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627616232] [2022-11-02 20:51:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:43,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:43,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:43,940 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 659 out of 832 [2022-11-02 20:51:43,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 677 transitions, 1469 flow. Second operand has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:43,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:43,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 659 of 832 [2022-11-02 20:51:43,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:44,866 INFO L130 PetriNetUnfolder]: 0/1165 cut-off events. [2022-11-02 20:51:44,867 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-02 20:51:44,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1165 events. 0/1165 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4064 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-11-02 20:51:44,870 INFO L137 encePairwiseOnDemand]: 829/832 looper letters, 32 selfloop transitions, 2 changer transitions 0/681 dead transitions. [2022-11-02 20:51:44,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 681 transitions, 1545 flow [2022-11-02 20:51:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2012 transitions. [2022-11-02 20:51:44,873 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8060897435897436 [2022-11-02 20:51:44,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2012 transitions. [2022-11-02 20:51:44,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2012 transitions. [2022-11-02 20:51:44,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:44,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2012 transitions. [2022-11-02 20:51:44,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 670.6666666666666) internal successors, (2012), 3 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:44,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:44,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:44,879 INFO L175 Difference]: Start difference. First operand has 737 places, 677 transitions, 1469 flow. Second operand 3 states and 2012 transitions. [2022-11-02 20:51:44,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 681 transitions, 1545 flow [2022-11-02 20:51:44,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 681 transitions, 1545 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:44,888 INFO L231 Difference]: Finished difference. Result has 728 places, 678 transitions, 1481 flow [2022-11-02 20:51:44,889 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1481, PETRI_PLACES=728, PETRI_TRANSITIONS=678} [2022-11-02 20:51:44,889 INFO L287 CegarLoopForPetriNet]: 737 programPoint places, -9 predicate places. [2022-11-02 20:51:44,889 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 678 transitions, 1481 flow [2022-11-02 20:51:44,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:44,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:44,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-11-02 20:51:44,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1295833056, now seen corresponding path program 1 times [2022-11-02 20:51:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:44,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922624046] [2022-11-02 20:51:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:44,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922624046] [2022-11-02 20:51:44,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922624046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298782920] [2022-11-02 20:51:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:44,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:44,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:44,950 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:44,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-02 20:51:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:51:45,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:45,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:45,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298782920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:45,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:45,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:51:45,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602988918] [2022-11-02 20:51:45,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:51:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:51:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:51:45,617 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-11-02 20:51:45,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 678 transitions, 1481 flow. Second operand has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:45,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:45,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-11-02 20:51:45,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:46,719 INFO L130 PetriNetUnfolder]: 0/1139 cut-off events. [2022-11-02 20:51:46,719 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-02 20:51:46,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1445 conditions, 1139 events. 0/1139 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3924 event pairs, 0 based on Foata normal form. 2/1141 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-02 20:51:46,721 INFO L137 encePairwiseOnDemand]: 826/832 looper letters, 33 selfloop transitions, 9 changer transitions 0/688 dead transitions. [2022-11-02 20:51:46,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 688 transitions, 1587 flow [2022-11-02 20:51:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:51:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:51:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5966 transitions. [2022-11-02 20:51:46,727 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7967414529914529 [2022-11-02 20:51:46,727 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5966 transitions. [2022-11-02 20:51:46,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5966 transitions. [2022-11-02 20:51:46,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:46,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5966 transitions. [2022-11-02 20:51:46,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 662.8888888888889) internal successors, (5966), 9 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,738 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,738 INFO L175 Difference]: Start difference. First operand has 728 places, 678 transitions, 1481 flow. Second operand 9 states and 5966 transitions. [2022-11-02 20:51:46,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 688 transitions, 1587 flow [2022-11-02 20:51:46,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 688 transitions, 1585 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:46,746 INFO L231 Difference]: Finished difference. Result has 738 places, 684 transitions, 1529 flow [2022-11-02 20:51:46,747 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1529, PETRI_PLACES=738, PETRI_TRANSITIONS=684} [2022-11-02 20:51:46,747 INFO L287 CegarLoopForPetriNet]: 737 programPoint places, 1 predicate places. [2022-11-02 20:51:46,747 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 684 transitions, 1529 flow [2022-11-02 20:51:46,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:46,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:46,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:46,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-02 20:51:46,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-11-02 20:51:46,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -766795499, now seen corresponding path program 1 times [2022-11-02 20:51:46,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:46,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868586033] [2022-11-02 20:51:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:46,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:47,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:47,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868586033] [2022-11-02 20:51:47,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868586033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:47,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060250371] [2022-11-02 20:51:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:47,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:47,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:47,032 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:47,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-02 20:51:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:51:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:47,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:47,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060250371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:47,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:47,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:51:47,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780035029] [2022-11-02 20:51:47,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:47,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:51:47,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:47,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:51:47,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:51:47,800 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-11-02 20:51:47,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 684 transitions, 1529 flow. Second operand has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:47,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:47,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-11-02 20:51:47,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:48,854 INFO L130 PetriNetUnfolder]: 0/1087 cut-off events. [2022-11-02 20:51:48,854 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-02 20:51:48,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1558 conditions, 1087 events. 0/1087 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3575 event pairs, 0 based on Foata normal form. 4/1091 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-02 20:51:48,858 INFO L137 encePairwiseOnDemand]: 826/832 looper letters, 41 selfloop transitions, 21 changer transitions 0/708 dead transitions. [2022-11-02 20:51:48,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 708 transitions, 1761 flow [2022-11-02 20:51:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:51:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:51:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13884 transitions. [2022-11-02 20:51:48,874 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-11-02 20:51:48,875 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13884 transitions. [2022-11-02 20:51:48,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13884 transitions. [2022-11-02 20:51:48,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:48,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13884 transitions. [2022-11-02 20:51:48,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 661.1428571428571) internal successors, (13884), 21 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:48,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:48,901 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:48,901 INFO L175 Difference]: Start difference. First operand has 738 places, 684 transitions, 1529 flow. Second operand 21 states and 13884 transitions. [2022-11-02 20:51:48,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 708 transitions, 1761 flow [2022-11-02 20:51:48,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 708 transitions, 1747 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:51:48,911 INFO L231 Difference]: Finished difference. Result has 762 places, 697 transitions, 1653 flow [2022-11-02 20:51:48,912 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1653, PETRI_PLACES=762, PETRI_TRANSITIONS=697} [2022-11-02 20:51:48,912 INFO L287 CegarLoopForPetriNet]: 737 programPoint places, 25 predicate places. [2022-11-02 20:51:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 697 transitions, 1653 flow [2022-11-02 20:51:48,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:48,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:48,914 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:48,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-02 20:51:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-11-02 20:51:49,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash 599763339, now seen corresponding path program 1 times [2022-11-02 20:51:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:49,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457988003] [2022-11-02 20:51:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457988003] [2022-11-02 20:51:49,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457988003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636449439] [2022-11-02 20:51:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:49,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:49,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:49,338 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:49,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-02 20:51:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:49,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:51:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:50,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:50,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636449439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:50,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:50,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:51:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543780176] [2022-11-02 20:51:50,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:50,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:51:50,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:51:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:51:50,416 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-11-02 20:51:50,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 697 transitions, 1653 flow. Second operand has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:50,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:50,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-11-02 20:51:50,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:51,784 INFO L130 PetriNetUnfolder]: 0/983 cut-off events. [2022-11-02 20:51:51,784 INFO L131 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-11-02 20:51:51,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 983 events. 0/983 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2895 event pairs, 0 based on Foata normal form. 8/991 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-02 20:51:51,787 INFO L137 encePairwiseOnDemand]: 826/832 looper letters, 57 selfloop transitions, 45 changer transitions 0/748 dead transitions. [2022-11-02 20:51:51,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 748 transitions, 2173 flow [2022-11-02 20:51:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:51:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:51:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29720 transitions. [2022-11-02 20:51:51,804 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7938034188034188 [2022-11-02 20:51:51,804 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29720 transitions. [2022-11-02 20:51:51,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29720 transitions. [2022-11-02 20:51:51,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:51,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29720 transitions. [2022-11-02 20:51:51,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 660.4444444444445) internal successors, (29720), 45 states have internal predecessors, (29720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:51,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:51,849 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:51,849 INFO L175 Difference]: Start difference. First operand has 762 places, 697 transitions, 1653 flow. Second operand 45 states and 29720 transitions. [2022-11-02 20:51:51,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 748 transitions, 2173 flow [2022-11-02 20:51:51,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 748 transitions, 2133 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:51:51,861 INFO L231 Difference]: Finished difference. Result has 809 places, 722 transitions, 1931 flow [2022-11-02 20:51:51,861 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=756, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1931, PETRI_PLACES=809, PETRI_TRANSITIONS=722} [2022-11-02 20:51:51,861 INFO L287 CegarLoopForPetriNet]: 737 programPoint places, 72 predicate places. [2022-11-02 20:51:51,861 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 722 transitions, 1931 flow [2022-11-02 20:51:51,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:51,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:51,864 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:51,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:52,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 360184487, now seen corresponding path program 1 times [2022-11-02 20:51:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018636291] [2022-11-02 20:51:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:52,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:52,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018636291] [2022-11-02 20:51:52,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018636291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988607944] [2022-11-02 20:51:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:52,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:52,703 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:52,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-02 20:51:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:51:53,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:53,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:54,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988607944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:54,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:54,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:51:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901100625] [2022-11-02 20:51:54,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:51:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:51:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:51:54,557 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-11-02 20:51:54,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 722 transitions, 1931 flow. Second operand has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:54,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:54,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-11-02 20:51:54,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:56,662 INFO L130 PetriNetUnfolder]: 0/866 cut-off events. [2022-11-02 20:51:56,662 INFO L131 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-11-02 20:51:56,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-02 20:51:56,664 INFO L137 encePairwiseOnDemand]: 827/832 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-11-02 20:51:56,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 776 transitions, 2657 flow [2022-11-02 20:51:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:51:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-02 20:51:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47527 transitions. [2022-11-02 20:51:56,689 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7933860844017094 [2022-11-02 20:51:56,689 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47527 transitions. [2022-11-02 20:51:56,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47527 transitions. [2022-11-02 20:51:56,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:56,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47527 transitions. [2022-11-02 20:51:56,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 660.0972222222222) internal successors, (47527), 72 states have internal predecessors, (47527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:56,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:56,779 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:56,779 INFO L175 Difference]: Start difference. First operand has 809 places, 722 transitions, 1931 flow. Second operand 72 states and 47527 transitions. [2022-11-02 20:51:56,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 776 transitions, 2657 flow [2022-11-02 20:51:56,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-11-02 20:51:56,798 INFO L231 Difference]: Finished difference. Result has 834 places, 733 transitions, 2087 flow [2022-11-02 20:51:56,798 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=834, PETRI_TRANSITIONS=733} [2022-11-02 20:51:56,799 INFO L287 CegarLoopForPetriNet]: 737 programPoint places, 97 predicate places. [2022-11-02 20:51:56,799 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 733 transitions, 2087 flow [2022-11-02 20:51:56,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:56,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:56,805 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:56,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:57,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash -134735529, now seen corresponding path program 1 times [2022-11-02 20:51:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:57,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373109457] [2022-11-02 20:51:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:57,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:51:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:51:57,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:51:57,144 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:51:57,144 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:51:57,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:51:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-11-02 20:51:57,145 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:57,145 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:51:57,145 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-11-02 20:51:57,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:51:57,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 766 places, 865 transitions, 2402 flow [2022-11-02 20:51:58,232 INFO L130 PetriNetUnfolder]: 244/1796 cut-off events. [2022-11-02 20:51:58,232 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-11-02 20:51:58,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1796 events. 244/1796 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6881 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 2042. Up to 50 conditions per place. [2022-11-02 20:51:58,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 865 transitions, 2402 flow [2022-11-02 20:51:58,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 766 places, 865 transitions, 2402 flow [2022-11-02 20:51:58,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:51:58,463 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:51:58,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:51:58,468 INFO L130 PetriNetUnfolder]: 4/92 cut-off events. [2022-11-02 20:51:58,468 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:51:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:58,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:58,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1513814343, now seen corresponding path program 1 times [2022-11-02 20:51:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:58,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762923834] [2022-11-02 20:51:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:58,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762923834] [2022-11-02 20:51:58,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762923834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:51:58,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:51:58,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:51:58,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644585365] [2022-11-02 20:51:58,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:51:58,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:51:58,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:58,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:51:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:51:58,499 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 685 out of 865 [2022-11-02 20:51:58,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 865 transitions, 2402 flow. Second operand has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:58,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:51:58,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 685 of 865 [2022-11-02 20:51:58,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:51:59,581 INFO L130 PetriNetUnfolder]: 0/1502 cut-off events. [2022-11-02 20:51:59,581 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-11-02 20:51:59,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2024 conditions, 1502 events. 0/1502 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6325 event pairs, 0 based on Foata normal form. 9937/11391 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-11-02 20:51:59,583 INFO L137 encePairwiseOnDemand]: 714/865 looper letters, 33 selfloop transitions, 2 changer transitions 12/720 dead transitions. [2022-11-02 20:51:59,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 720 transitions, 2182 flow [2022-11-02 20:51:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:51:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:51:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2246 transitions. [2022-11-02 20:51:59,586 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8655105973025048 [2022-11-02 20:51:59,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2246 transitions. [2022-11-02 20:51:59,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2246 transitions. [2022-11-02 20:51:59,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:51:59,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2246 transitions. [2022-11-02 20:51:59,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 748.6666666666666) internal successors, (2246), 3 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:59,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:59,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:59,589 INFO L175 Difference]: Start difference. First operand has 766 places, 865 transitions, 2402 flow. Second operand 3 states and 2246 transitions. [2022-11-02 20:51:59,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 720 transitions, 2182 flow [2022-11-02 20:51:59,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 720 transitions, 1630 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-11-02 20:51:59,598 INFO L231 Difference]: Finished difference. Result has 768 places, 705 transitions, 1540 flow [2022-11-02 20:51:59,599 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1540, PETRI_PLACES=768, PETRI_TRANSITIONS=705} [2022-11-02 20:51:59,599 INFO L287 CegarLoopForPetriNet]: 766 programPoint places, 2 predicate places. [2022-11-02 20:51:59,599 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 705 transitions, 1540 flow [2022-11-02 20:51:59,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:59,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:51:59,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:59,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-11-02 20:51:59,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:51:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1822420096, now seen corresponding path program 1 times [2022-11-02 20:51:59,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259460207] [2022-11-02 20:51:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:59,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:59,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:59,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259460207] [2022-11-02 20:51:59,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259460207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065934586] [2022-11-02 20:51:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:59,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:59,641 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:59,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-02 20:52:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:00,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:00,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065934586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:00,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:00,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:52:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572790572] [2022-11-02 20:52:00,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:00,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:52:00,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:52:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:52:00,313 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-11-02 20:52:00,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 705 transitions, 1540 flow. Second operand has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:00,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:00,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-11-02 20:52:00,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:01,368 INFO L130 PetriNetUnfolder]: 0/1188 cut-off events. [2022-11-02 20:52:01,368 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-02 20:52:01,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1188 events. 0/1188 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4105 event pairs, 0 based on Foata normal form. 2/1190 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-11-02 20:52:01,372 INFO L137 encePairwiseOnDemand]: 859/865 looper letters, 34 selfloop transitions, 9 changer transitions 0/715 dead transitions. [2022-11-02 20:52:01,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 715 transitions, 1648 flow [2022-11-02 20:52:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:52:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:52:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6201 transitions. [2022-11-02 20:52:01,377 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7965317919075144 [2022-11-02 20:52:01,377 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6201 transitions. [2022-11-02 20:52:01,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6201 transitions. [2022-11-02 20:52:01,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:01,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6201 transitions. [2022-11-02 20:52:01,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 689.0) internal successors, (6201), 9 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:01,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:01,388 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:01,388 INFO L175 Difference]: Start difference. First operand has 768 places, 705 transitions, 1540 flow. Second operand 9 states and 6201 transitions. [2022-11-02 20:52:01,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 715 transitions, 1648 flow [2022-11-02 20:52:01,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 715 transitions, 1646 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:01,400 INFO L231 Difference]: Finished difference. Result has 766 places, 711 transitions, 1588 flow [2022-11-02 20:52:01,400 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=766, PETRI_TRANSITIONS=711} [2022-11-02 20:52:01,400 INFO L287 CegarLoopForPetriNet]: 766 programPoint places, 0 predicate places. [2022-11-02 20:52:01,401 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 711 transitions, 1588 flow [2022-11-02 20:52:01,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:01,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:01,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:01,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:01,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash 329246261, now seen corresponding path program 1 times [2022-11-02 20:52:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:01,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564115400] [2022-11-02 20:52:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:01,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564115400] [2022-11-02 20:52:01,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564115400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921703077] [2022-11-02 20:52:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:01,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:01,683 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:01,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-02 20:52:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:52:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:02,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:02,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921703077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:02,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:02,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:52:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426590608] [2022-11-02 20:52:02,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:02,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:52:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:02,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:52:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:52:02,459 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-11-02 20:52:02,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 711 transitions, 1588 flow. Second operand has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:02,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:02,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-11-02 20:52:02,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:03,644 INFO L130 PetriNetUnfolder]: 0/1136 cut-off events. [2022-11-02 20:52:03,644 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-11-02 20:52:03,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 1136 events. 0/1136 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3761 event pairs, 0 based on Foata normal form. 4/1140 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-02 20:52:03,646 INFO L137 encePairwiseOnDemand]: 859/865 looper letters, 42 selfloop transitions, 21 changer transitions 0/735 dead transitions. [2022-11-02 20:52:03,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 735 transitions, 1822 flow [2022-11-02 20:52:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:52:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:52:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14431 transitions. [2022-11-02 20:52:03,656 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7944398568676025 [2022-11-02 20:52:03,656 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14431 transitions. [2022-11-02 20:52:03,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14431 transitions. [2022-11-02 20:52:03,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:03,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14431 transitions. [2022-11-02 20:52:03,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 687.1904761904761) internal successors, (14431), 21 states have internal predecessors, (14431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:03,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:03,679 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:03,679 INFO L175 Difference]: Start difference. First operand has 766 places, 711 transitions, 1588 flow. Second operand 21 states and 14431 transitions. [2022-11-02 20:52:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 735 transitions, 1822 flow [2022-11-02 20:52:03,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 735 transitions, 1808 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:03,688 INFO L231 Difference]: Finished difference. Result has 790 places, 724 transitions, 1712 flow [2022-11-02 20:52:03,689 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1712, PETRI_PLACES=790, PETRI_TRANSITIONS=724} [2022-11-02 20:52:03,689 INFO L287 CegarLoopForPetriNet]: 766 programPoint places, 24 predicate places. [2022-11-02 20:52:03,689 INFO L495 AbstractCegarLoop]: Abstraction has has 790 places, 724 transitions, 1712 flow [2022-11-02 20:52:03,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:03,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:03,691 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:03,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-02 20:52:03,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:03,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:03,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1297432149, now seen corresponding path program 1 times [2022-11-02 20:52:03,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:03,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588231544] [2022-11-02 20:52:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:03,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:04,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588231544] [2022-11-02 20:52:04,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588231544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486385058] [2022-11-02 20:52:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:04,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:04,110 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:04,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-02 20:52:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:52:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:04,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:05,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486385058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:05,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:05,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:52:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363692364] [2022-11-02 20:52:05,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:05,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:52:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:52:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:52:05,171 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-11-02 20:52:05,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 724 transitions, 1712 flow. Second operand has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:05,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:05,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-11-02 20:52:05,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:06,689 INFO L130 PetriNetUnfolder]: 0/1032 cut-off events. [2022-11-02 20:52:06,689 INFO L131 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-11-02 20:52:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 1032 events. 0/1032 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3077 event pairs, 0 based on Foata normal form. 8/1040 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-11-02 20:52:06,691 INFO L137 encePairwiseOnDemand]: 859/865 looper letters, 58 selfloop transitions, 45 changer transitions 0/775 dead transitions. [2022-11-02 20:52:06,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 775 transitions, 2234 flow [2022-11-02 20:52:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:52:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:52:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30891 transitions. [2022-11-02 20:52:06,706 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7936030828516377 [2022-11-02 20:52:06,707 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30891 transitions. [2022-11-02 20:52:06,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30891 transitions. [2022-11-02 20:52:06,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:06,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30891 transitions. [2022-11-02 20:52:06,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 686.4666666666667) internal successors, (30891), 45 states have internal predecessors, (30891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:06,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:06,750 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:06,750 INFO L175 Difference]: Start difference. First operand has 790 places, 724 transitions, 1712 flow. Second operand 45 states and 30891 transitions. [2022-11-02 20:52:06,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 775 transitions, 2234 flow [2022-11-02 20:52:06,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 775 transitions, 2194 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:52:06,761 INFO L231 Difference]: Finished difference. Result has 837 places, 749 transitions, 1990 flow [2022-11-02 20:52:06,761 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1990, PETRI_PLACES=837, PETRI_TRANSITIONS=749} [2022-11-02 20:52:06,761 INFO L287 CegarLoopForPetriNet]: 766 programPoint places, 71 predicate places. [2022-11-02 20:52:06,761 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 749 transitions, 1990 flow [2022-11-02 20:52:06,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:06,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:06,764 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:06,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-02 20:52:06,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:06,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -622610233, now seen corresponding path program 1 times [2022-11-02 20:52:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:06,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011365583] [2022-11-02 20:52:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011365583] [2022-11-02 20:52:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011365583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:07,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630503894] [2022-11-02 20:52:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:07,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:07,607 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-02 20:52:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:52:08,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:09,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630503894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:09,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:09,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:52:09,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603160707] [2022-11-02 20:52:09,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:09,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:52:09,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:09,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:52:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:52:09,556 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-11-02 20:52:09,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 749 transitions, 1990 flow. Second operand has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:09,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:09,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-11-02 20:52:09,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:11,809 INFO L130 PetriNetUnfolder]: 0/902 cut-off events. [2022-11-02 20:52:11,809 INFO L131 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-11-02 20:52:11,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-11-02 20:52:11,811 INFO L137 encePairwiseOnDemand]: 860/865 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-11-02 20:52:11,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-11-02 20:52:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-02 20:52:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-02 20:52:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51458 transitions. [2022-11-02 20:52:11,855 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931868978805395 [2022-11-02 20:52:11,855 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51458 transitions. [2022-11-02 20:52:11,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51458 transitions. [2022-11-02 20:52:11,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:11,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51458 transitions. [2022-11-02 20:52:11,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 686.1066666666667) internal successors, (51458), 75 states have internal predecessors, (51458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:11,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:11,958 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:11,958 INFO L175 Difference]: Start difference. First operand has 837 places, 749 transitions, 1990 flow. Second operand 75 states and 51458 transitions. [2022-11-02 20:52:11,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-11-02 20:52:11,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-11-02 20:52:11,977 INFO L231 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-11-02 20:52:11,978 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=865, PETRI_TRANSITIONS=763} [2022-11-02 20:52:11,978 INFO L287 CegarLoopForPetriNet]: 766 programPoint places, 99 predicate places. [2022-11-02 20:52:11,979 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-11-02 20:52:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:11,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:11,987 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:12,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:12,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-11-02 20:52:12,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash -762434393, now seen corresponding path program 1 times [2022-11-02 20:52:12,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:12,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954389455] [2022-11-02 20:52:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:12,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:12,245 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:12,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:12,322 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:52:12,322 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:52:12,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:52:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-11-02 20:52:12,323 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:52:12,323 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:52:12,323 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-11-02 20:52:12,392 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:52:12,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 795 places, 898 transitions, 2521 flow [2022-11-02 20:52:13,633 INFO L130 PetriNetUnfolder]: 254/1868 cut-off events. [2022-11-02 20:52:13,633 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-11-02 20:52:13,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 1868 events. 254/1868 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7150 event pairs, 0 based on Foata normal form. 0/1562 useless extension candidates. Maximal degree in co-relation 2141. Up to 52 conditions per place. [2022-11-02 20:52:13,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 898 transitions, 2521 flow [2022-11-02 20:52:13,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 898 transitions, 2521 flow [2022-11-02 20:52:13,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:13,852 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:13,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:52:13,861 INFO L130 PetriNetUnfolder]: 4/87 cut-off events. [2022-11-02 20:52:13,861 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:13,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:13,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:13,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -470861690, now seen corresponding path program 1 times [2022-11-02 20:52:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:13,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359505052] [2022-11-02 20:52:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359505052] [2022-11-02 20:52:13,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359505052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:13,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:13,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:52:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289094373] [2022-11-02 20:52:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:52:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:52:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:52:13,887 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 718 out of 898 [2022-11-02 20:52:13,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 898 transitions, 2521 flow. Second operand has 2 states, 2 states have (on average 718.5) internal successors, (1437), 2 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:13,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:13,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 718 of 898 [2022-11-02 20:52:13,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:15,078 INFO L130 PetriNetUnfolder]: 0/1588 cut-off events. [2022-11-02 20:52:15,078 INFO L131 PetriNetUnfolder]: For 3225/3225 co-relation queries the response was YES. [2022-11-02 20:52:15,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2015 conditions, 1588 events. 0/1588 cut-off events. For 3225/3225 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6672 event pairs, 0 based on Foata normal form. 1912/3448 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2022-11-02 20:52:15,081 INFO L137 encePairwiseOnDemand]: 744/898 looper letters, 25 selfloop transitions, 0 changer transitions 12/743 dead transitions. [2022-11-02 20:52:15,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 743 transitions, 2261 flow [2022-11-02 20:52:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:52:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:52:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1615 transitions. [2022-11-02 20:52:15,083 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8992204899777283 [2022-11-02 20:52:15,084 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1615 transitions. [2022-11-02 20:52:15,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1615 transitions. [2022-11-02 20:52:15,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:15,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1615 transitions. [2022-11-02 20:52:15,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 807.5) internal successors, (1615), 2 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:15,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 898.0) internal successors, (2694), 3 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:15,087 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 898.0) internal successors, (2694), 3 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:15,087 INFO L175 Difference]: Start difference. First operand has 795 places, 898 transitions, 2521 flow. Second operand 2 states and 1615 transitions. [2022-11-02 20:52:15,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 743 transitions, 2261 flow [2022-11-02 20:52:15,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 743 transitions, 1661 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-11-02 20:52:15,099 INFO L231 Difference]: Finished difference. Result has 795 places, 731 transitions, 1587 flow [2022-11-02 20:52:15,099 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1587, PETRI_PLACES=795, PETRI_TRANSITIONS=731} [2022-11-02 20:52:15,100 INFO L287 CegarLoopForPetriNet]: 795 programPoint places, 0 predicate places. [2022-11-02 20:52:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 731 transitions, 1587 flow [2022-11-02 20:52:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 718.5) internal successors, (1437), 2 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:15,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-11-02 20:52:15,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash -764264697, now seen corresponding path program 1 times [2022-11-02 20:52:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260022643] [2022-11-02 20:52:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:15,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260022643] [2022-11-02 20:52:15,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260022643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:15,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:15,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:52:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496815427] [2022-11-02 20:52:15,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:52:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:52:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:52:15,130 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 711 out of 898 [2022-11-02 20:52:15,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 731 transitions, 1587 flow. Second operand has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:15,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:15,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 711 of 898 [2022-11-02 20:52:15,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:16,199 INFO L130 PetriNetUnfolder]: 0/1263 cut-off events. [2022-11-02 20:52:16,199 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 20:52:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1263 events. 0/1263 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4429 event pairs, 0 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-11-02 20:52:16,202 INFO L137 encePairwiseOnDemand]: 895/898 looper letters, 34 selfloop transitions, 2 changer transitions 0/735 dead transitions. [2022-11-02 20:52:16,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 735 transitions, 1667 flow [2022-11-02 20:52:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:52:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:52:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2170 transitions. [2022-11-02 20:52:16,205 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8054936896807721 [2022-11-02 20:52:16,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2170 transitions. [2022-11-02 20:52:16,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2170 transitions. [2022-11-02 20:52:16,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:16,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2170 transitions. [2022-11-02 20:52:16,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 723.3333333333334) internal successors, (2170), 3 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:16,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:16,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:16,209 INFO L175 Difference]: Start difference. First operand has 795 places, 731 transitions, 1587 flow. Second operand 3 states and 2170 transitions. [2022-11-02 20:52:16,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 735 transitions, 1667 flow [2022-11-02 20:52:16,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 735 transitions, 1667 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:52:16,218 INFO L231 Difference]: Finished difference. Result has 786 places, 732 transitions, 1599 flow [2022-11-02 20:52:16,218 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1599, PETRI_PLACES=786, PETRI_TRANSITIONS=732} [2022-11-02 20:52:16,219 INFO L287 CegarLoopForPetriNet]: 795 programPoint places, -9 predicate places. [2022-11-02 20:52:16,219 INFO L495 AbstractCegarLoop]: Abstraction has has 786 places, 732 transitions, 1599 flow [2022-11-02 20:52:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:16,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:16,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-11-02 20:52:16,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1670188384, now seen corresponding path program 1 times [2022-11-02 20:52:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:16,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407005362] [2022-11-02 20:52:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:16,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407005362] [2022-11-02 20:52:16,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407005362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:16,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018591423] [2022-11-02 20:52:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:16,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:16,312 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:16,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-02 20:52:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:16,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:16,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:17,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018591423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:17,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:17,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:52:17,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261573958] [2022-11-02 20:52:17,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:17,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:52:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:52:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:52:17,032 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-11-02 20:52:17,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 786 places, 732 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:17,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:17,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-11-02 20:52:17,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:18,165 INFO L130 PetriNetUnfolder]: 0/1237 cut-off events. [2022-11-02 20:52:18,165 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-02 20:52:18,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 1237 events. 0/1237 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4282 event pairs, 0 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-11-02 20:52:18,168 INFO L137 encePairwiseOnDemand]: 892/898 looper letters, 35 selfloop transitions, 9 changer transitions 0/742 dead transitions. [2022-11-02 20:52:18,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 794 places, 742 transitions, 1709 flow [2022-11-02 20:52:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:52:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:52:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6436 transitions. [2022-11-02 20:52:18,173 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7963375402128187 [2022-11-02 20:52:18,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6436 transitions. [2022-11-02 20:52:18,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6436 transitions. [2022-11-02 20:52:18,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:18,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6436 transitions. [2022-11-02 20:52:18,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 715.1111111111111) internal successors, (6436), 9 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:18,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:18,184 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:18,184 INFO L175 Difference]: Start difference. First operand has 786 places, 732 transitions, 1599 flow. Second operand 9 states and 6436 transitions. [2022-11-02 20:52:18,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 794 places, 742 transitions, 1709 flow [2022-11-02 20:52:18,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 742 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:18,193 INFO L231 Difference]: Finished difference. Result has 796 places, 738 transitions, 1647 flow [2022-11-02 20:52:18,194 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1647, PETRI_PLACES=796, PETRI_TRANSITIONS=738} [2022-11-02 20:52:18,194 INFO L287 CegarLoopForPetriNet]: 795 programPoint places, 1 predicate places. [2022-11-02 20:52:18,194 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 738 transitions, 1647 flow [2022-11-02 20:52:18,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:18,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:18,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:18,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:18,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-11-02 20:52:18,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash -707309547, now seen corresponding path program 1 times [2022-11-02 20:52:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144942774] [2022-11-02 20:52:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:18,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:18,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144942774] [2022-11-02 20:52:18,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144942774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:18,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903142522] [2022-11-02 20:52:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:18,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:18,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:18,489 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:18,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-02 20:52:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:52:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:19,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:19,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903142522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:19,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:19,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:52:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541099659] [2022-11-02 20:52:19,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:19,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:52:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:52:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:52:19,310 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-11-02 20:52:19,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 738 transitions, 1647 flow. Second operand has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:19,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:19,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-11-02 20:52:19,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:20,538 INFO L130 PetriNetUnfolder]: 0/1185 cut-off events. [2022-11-02 20:52:20,538 INFO L131 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-11-02 20:52:20,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 1185 events. 0/1185 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3945 event pairs, 0 based on Foata normal form. 4/1189 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-02 20:52:20,541 INFO L137 encePairwiseOnDemand]: 892/898 looper letters, 43 selfloop transitions, 21 changer transitions 0/762 dead transitions. [2022-11-02 20:52:20,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 762 transitions, 1883 flow [2022-11-02 20:52:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:52:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:52:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14978 transitions. [2022-11-02 20:52:20,554 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7942517764344045 [2022-11-02 20:52:20,554 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14978 transitions. [2022-11-02 20:52:20,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14978 transitions. [2022-11-02 20:52:20,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:20,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14978 transitions. [2022-11-02 20:52:20,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 713.2380952380952) internal successors, (14978), 21 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:20,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:20,581 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:20,581 INFO L175 Difference]: Start difference. First operand has 796 places, 738 transitions, 1647 flow. Second operand 21 states and 14978 transitions. [2022-11-02 20:52:20,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 762 transitions, 1883 flow [2022-11-02 20:52:20,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 762 transitions, 1869 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:20,591 INFO L231 Difference]: Finished difference. Result has 820 places, 751 transitions, 1771 flow [2022-11-02 20:52:20,591 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=795, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1771, PETRI_PLACES=820, PETRI_TRANSITIONS=751} [2022-11-02 20:52:20,592 INFO L287 CegarLoopForPetriNet]: 795 programPoint places, 25 predicate places. [2022-11-02 20:52:20,592 INFO L495 AbstractCegarLoop]: Abstraction has has 820 places, 751 transitions, 1771 flow [2022-11-02 20:52:20,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:20,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:20,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-02 20:52:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-11-02 20:52:20,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1350000373, now seen corresponding path program 1 times [2022-11-02 20:52:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:20,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551082282] [2022-11-02 20:52:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:20,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:21,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551082282] [2022-11-02 20:52:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551082282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18470406] [2022-11-02 20:52:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:21,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:21,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:21,057 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:21,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-02 20:52:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:52:21,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:22,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18470406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:22,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:22,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:52:22,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399258895] [2022-11-02 20:52:22,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:22,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:52:22,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:52:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:52:22,158 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-11-02 20:52:22,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 751 transitions, 1771 flow. Second operand has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:22,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:22,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-11-02 20:52:22,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:23,655 INFO L130 PetriNetUnfolder]: 0/1081 cut-off events. [2022-11-02 20:52:23,655 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-02 20:52:23,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 1081 events. 0/1081 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3262 event pairs, 0 based on Foata normal form. 8/1089 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-02 20:52:23,658 INFO L137 encePairwiseOnDemand]: 892/898 looper letters, 59 selfloop transitions, 45 changer transitions 0/802 dead transitions. [2022-11-02 20:52:23,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 802 transitions, 2295 flow [2022-11-02 20:52:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:52:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:52:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 32062 transitions. [2022-11-02 20:52:23,685 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7934174709230388 [2022-11-02 20:52:23,685 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 32062 transitions. [2022-11-02 20:52:23,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 32062 transitions. [2022-11-02 20:52:23,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:23,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 32062 transitions. [2022-11-02 20:52:23,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 712.4888888888889) internal successors, (32062), 45 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:23,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:23,753 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:23,753 INFO L175 Difference]: Start difference. First operand has 820 places, 751 transitions, 1771 flow. Second operand 45 states and 32062 transitions. [2022-11-02 20:52:23,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 802 transitions, 2295 flow [2022-11-02 20:52:23,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 858 places, 802 transitions, 2255 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:52:23,771 INFO L231 Difference]: Finished difference. Result has 867 places, 776 transitions, 2049 flow [2022-11-02 20:52:23,772 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=814, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2049, PETRI_PLACES=867, PETRI_TRANSITIONS=776} [2022-11-02 20:52:23,772 INFO L287 CegarLoopForPetriNet]: 795 programPoint places, 72 predicate places. [2022-11-02 20:52:23,772 INFO L495 AbstractCegarLoop]: Abstraction has has 867 places, 776 transitions, 2049 flow [2022-11-02 20:52:23,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:23,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:23,775 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:23,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-11-02 20:52:23,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 667157287, now seen corresponding path program 1 times [2022-11-02 20:52:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391305490] [2022-11-02 20:52:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391305490] [2022-11-02 20:52:24,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391305490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240870292] [2022-11-02 20:52:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:24,639 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:24,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-02 20:52:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:52:25,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:25,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:26,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240870292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:26,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:26,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:52:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25723282] [2022-11-02 20:52:26,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:26,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:52:26,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:52:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:52:26,623 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-11-02 20:52:26,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 867 places, 776 transitions, 2049 flow. Second operand has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:26,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:26,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-11-02 20:52:26,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:28,979 INFO L130 PetriNetUnfolder]: 0/938 cut-off events. [2022-11-02 20:52:28,979 INFO L131 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-11-02 20:52:28,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-11-02 20:52:28,983 INFO L137 encePairwiseOnDemand]: 893/898 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-11-02 20:52:28,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 840 transitions, 2887 flow [2022-11-02 20:52:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-02 20:52:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-02 20:52:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55545 transitions. [2022-11-02 20:52:29,013 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7930015418879561 [2022-11-02 20:52:29,013 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55545 transitions. [2022-11-02 20:52:29,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55545 transitions. [2022-11-02 20:52:29,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:29,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55545 transitions. [2022-11-02 20:52:29,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 712.1153846153846) internal successors, (55545), 78 states have internal predecessors, (55545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:29,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:29,096 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:29,096 INFO L175 Difference]: Start difference. First operand has 867 places, 776 transitions, 2049 flow. Second operand 78 states and 55545 transitions. [2022-11-02 20:52:29,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 840 transitions, 2887 flow [2022-11-02 20:52:29,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-11-02 20:52:29,112 INFO L231 Difference]: Finished difference. Result has 898 places, 793 transitions, 2263 flow [2022-11-02 20:52:29,113 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=898, PETRI_TRANSITIONS=793} [2022-11-02 20:52:29,113 INFO L287 CegarLoopForPetriNet]: 795 programPoint places, 103 predicate places. [2022-11-02 20:52:29,113 INFO L495 AbstractCegarLoop]: Abstraction has has 898 places, 793 transitions, 2263 flow [2022-11-02 20:52:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:29,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:29,120 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:29,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:29,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:29,334 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash 271882808, now seen corresponding path program 1 times [2022-11-02 20:52:29,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:29,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764319849] [2022-11-02 20:52:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:29,375 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:29,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:29,428 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:52:29,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:52:29,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:52:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-11-02 20:52:29,429 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:29,429 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:52:29,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-11-02 20:52:29,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:52:29,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 824 places, 931 transitions, 2642 flow [2022-11-02 20:52:30,706 INFO L130 PetriNetUnfolder]: 264/1940 cut-off events. [2022-11-02 20:52:30,706 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-11-02 20:52:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 1940 events. 264/1940 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7331 event pairs, 0 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 2241. Up to 54 conditions per place. [2022-11-02 20:52:30,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 824 places, 931 transitions, 2642 flow [2022-11-02 20:52:31,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 931 transitions, 2642 flow [2022-11-02 20:52:31,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:31,016 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:31,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:52:31,021 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-02 20:52:31,021 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:31,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:31,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:31,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807065, now seen corresponding path program 1 times [2022-11-02 20:52:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:31,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721857475] [2022-11-02 20:52:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:31,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:31,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721857475] [2022-11-02 20:52:31,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721857475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:31,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:31,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:52:31,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192589331] [2022-11-02 20:52:31,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:31,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:52:31,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:52:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:52:31,054 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 737 out of 931 [2022-11-02 20:52:31,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 931 transitions, 2642 flow. Second operand has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:31,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:31,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 737 of 931 [2022-11-02 20:52:31,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:32,282 INFO L130 PetriNetUnfolder]: 0/1624 cut-off events. [2022-11-02 20:52:32,283 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-11-02 20:52:32,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1624 events. 0/1624 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6845 event pairs, 0 based on Foata normal form. 11698/13270 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-11-02 20:52:32,286 INFO L137 encePairwiseOnDemand]: 768/931 looper letters, 35 selfloop transitions, 2 changer transitions 12/774 dead transitions. [2022-11-02 20:52:32,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 774 transitions, 2402 flow [2022-11-02 20:52:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:52:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:52:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-11-02 20:52:32,289 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8650196920873613 [2022-11-02 20:52:32,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-11-02 20:52:32,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-11-02 20:52:32,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:32,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-11-02 20:52:32,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:32,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:32,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:32,293 INFO L175 Difference]: Start difference. First operand has 824 places, 931 transitions, 2642 flow. Second operand 3 states and 2416 transitions. [2022-11-02 20:52:32,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 774 transitions, 2402 flow [2022-11-02 20:52:32,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 774 transitions, 1752 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-11-02 20:52:32,307 INFO L231 Difference]: Finished difference. Result has 826 places, 759 transitions, 1658 flow [2022-11-02 20:52:32,307 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1658, PETRI_PLACES=826, PETRI_TRANSITIONS=759} [2022-11-02 20:52:32,308 INFO L287 CegarLoopForPetriNet]: 824 programPoint places, 2 predicate places. [2022-11-02 20:52:32,308 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 759 transitions, 1658 flow [2022-11-02 20:52:32,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:32,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:32,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:32,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-11-02 20:52:32,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1752528192, now seen corresponding path program 1 times [2022-11-02 20:52:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:32,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833409504] [2022-11-02 20:52:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833409504] [2022-11-02 20:52:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833409504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447599999] [2022-11-02 20:52:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:32,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:32,353 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:32,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-02 20:52:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:33,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447599999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:33,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:33,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:52:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355911789] [2022-11-02 20:52:33,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:52:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:33,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:52:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:52:33,157 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-11-02 20:52:33,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 759 transitions, 1658 flow. Second operand has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:33,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:33,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-11-02 20:52:33,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:34,249 INFO L130 PetriNetUnfolder]: 0/1286 cut-off events. [2022-11-02 20:52:34,249 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-02 20:52:34,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 1286 events. 0/1286 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4473 event pairs, 0 based on Foata normal form. 2/1288 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-11-02 20:52:34,252 INFO L137 encePairwiseOnDemand]: 925/931 looper letters, 36 selfloop transitions, 9 changer transitions 0/769 dead transitions. [2022-11-02 20:52:34,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 769 transitions, 1770 flow [2022-11-02 20:52:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:52:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:52:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6671 transitions. [2022-11-02 20:52:34,259 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7961570593149541 [2022-11-02 20:52:34,259 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6671 transitions. [2022-11-02 20:52:34,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6671 transitions. [2022-11-02 20:52:34,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:34,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6671 transitions. [2022-11-02 20:52:34,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 741.2222222222222) internal successors, (6671), 9 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:34,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:34,275 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:34,275 INFO L175 Difference]: Start difference. First operand has 826 places, 759 transitions, 1658 flow. Second operand 9 states and 6671 transitions. [2022-11-02 20:52:34,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 769 transitions, 1770 flow [2022-11-02 20:52:34,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 769 transitions, 1768 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:34,287 INFO L231 Difference]: Finished difference. Result has 824 places, 765 transitions, 1706 flow [2022-11-02 20:52:34,287 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1706, PETRI_PLACES=824, PETRI_TRANSITIONS=765} [2022-11-02 20:52:34,287 INFO L287 CegarLoopForPetriNet]: 824 programPoint places, 0 predicate places. [2022-11-02 20:52:34,288 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 765 transitions, 1706 flow [2022-11-02 20:52:34,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:34,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:34,288 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:34,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-02 20:52:34,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:34,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:34,489 INFO L85 PathProgramCache]: Analyzing trace with hash 418504373, now seen corresponding path program 1 times [2022-11-02 20:52:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:34,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021764763] [2022-11-02 20:52:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:34,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021764763] [2022-11-02 20:52:34,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021764763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958730497] [2022-11-02 20:52:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:34,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:34,592 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:34,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-02 20:52:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:52:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:35,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:35,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958730497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:35,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:35,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:52:35,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431573364] [2022-11-02 20:52:35,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:35,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:52:35,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:52:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:52:35,508 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-11-02 20:52:35,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 765 transitions, 1706 flow. Second operand has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:35,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:35,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-11-02 20:52:35,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:36,844 INFO L130 PetriNetUnfolder]: 0/1234 cut-off events. [2022-11-02 20:52:36,844 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-02 20:52:36,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 1234 events. 0/1234 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4116 event pairs, 0 based on Foata normal form. 4/1238 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-02 20:52:36,848 INFO L137 encePairwiseOnDemand]: 925/931 looper letters, 44 selfloop transitions, 21 changer transitions 0/789 dead transitions. [2022-11-02 20:52:36,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 789 transitions, 1944 flow [2022-11-02 20:52:36,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:52:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:52:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15525 transitions. [2022-11-02 20:52:36,861 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7940770293079638 [2022-11-02 20:52:36,861 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15525 transitions. [2022-11-02 20:52:36,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15525 transitions. [2022-11-02 20:52:36,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:36,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15525 transitions. [2022-11-02 20:52:36,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 739.2857142857143) internal successors, (15525), 21 states have internal predecessors, (15525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:36,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:36,885 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:36,885 INFO L175 Difference]: Start difference. First operand has 824 places, 765 transitions, 1706 flow. Second operand 21 states and 15525 transitions. [2022-11-02 20:52:36,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 789 transitions, 1944 flow [2022-11-02 20:52:36,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1930 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:36,896 INFO L231 Difference]: Finished difference. Result has 848 places, 778 transitions, 1830 flow [2022-11-02 20:52:36,896 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1830, PETRI_PLACES=848, PETRI_TRANSITIONS=778} [2022-11-02 20:52:36,896 INFO L287 CegarLoopForPetriNet]: 824 programPoint places, 24 predicate places. [2022-11-02 20:52:36,897 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 778 transitions, 1830 flow [2022-11-02 20:52:36,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:36,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:36,899 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:36,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-02 20:52:37,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-11-02 20:52:37,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 442058667, now seen corresponding path program 1 times [2022-11-02 20:52:37,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:37,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997047341] [2022-11-02 20:52:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:37,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997047341] [2022-11-02 20:52:37,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997047341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774808789] [2022-11-02 20:52:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:37,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:37,311 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:37,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-02 20:52:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:52:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:38,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:38,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774808789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:38,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:38,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:52:38,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919227907] [2022-11-02 20:52:38,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:38,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:52:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:52:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:52:38,576 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-11-02 20:52:38,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 778 transitions, 1830 flow. Second operand has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:38,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:38,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-11-02 20:52:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:40,323 INFO L130 PetriNetUnfolder]: 0/1130 cut-off events. [2022-11-02 20:52:40,324 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-11-02 20:52:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 1130 events. 0/1130 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3441 event pairs, 0 based on Foata normal form. 8/1138 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-02 20:52:40,326 INFO L137 encePairwiseOnDemand]: 925/931 looper letters, 60 selfloop transitions, 45 changer transitions 0/829 dead transitions. [2022-11-02 20:52:40,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 829 transitions, 2356 flow [2022-11-02 20:52:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:52:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:52:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33233 transitions. [2022-11-02 20:52:40,345 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7932450173051677 [2022-11-02 20:52:40,345 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33233 transitions. [2022-11-02 20:52:40,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33233 transitions. [2022-11-02 20:52:40,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:40,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33233 transitions. [2022-11-02 20:52:40,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 738.5111111111111) internal successors, (33233), 45 states have internal predecessors, (33233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:40,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:40,396 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:40,396 INFO L175 Difference]: Start difference. First operand has 848 places, 778 transitions, 1830 flow. Second operand 45 states and 33233 transitions. [2022-11-02 20:52:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 829 transitions, 2356 flow [2022-11-02 20:52:40,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 829 transitions, 2316 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:52:40,407 INFO L231 Difference]: Finished difference. Result has 895 places, 803 transitions, 2108 flow [2022-11-02 20:52:40,408 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2108, PETRI_PLACES=895, PETRI_TRANSITIONS=803} [2022-11-02 20:52:40,408 INFO L287 CegarLoopForPetriNet]: 824 programPoint places, 71 predicate places. [2022-11-02 20:52:40,408 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 803 transitions, 2108 flow [2022-11-02 20:52:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:40,411 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:40,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-02 20:52:40,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-11-02 20:52:40,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash -65480249, now seen corresponding path program 1 times [2022-11-02 20:52:40,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:40,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265462403] [2022-11-02 20:52:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:40,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:41,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265462403] [2022-11-02 20:52:41,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265462403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:41,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722671911] [2022-11-02 20:52:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:41,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:41,244 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:41,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-02 20:52:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:52:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:42,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:43,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722671911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:43,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:43,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-02 20:52:43,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740295089] [2022-11-02 20:52:43,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:43,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:52:43,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:43,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:52:43,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:52:43,254 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-11-02 20:52:43,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 803 transitions, 2108 flow. Second operand has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:43,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:43,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-11-02 20:52:43,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:45,889 INFO L130 PetriNetUnfolder]: 0/974 cut-off events. [2022-11-02 20:52:45,889 INFO L131 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-11-02 20:52:45,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-02 20:52:45,891 INFO L137 encePairwiseOnDemand]: 926/931 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-11-02 20:52:45,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-11-02 20:52:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-02 20:52:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-02 20:52:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59788 transitions. [2022-11-02 20:52:45,921 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7928286324276299 [2022-11-02 20:52:45,921 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59788 transitions. [2022-11-02 20:52:45,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59788 transitions. [2022-11-02 20:52:45,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:45,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59788 transitions. [2022-11-02 20:52:45,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 738.1234567901234) internal successors, (59788), 81 states have internal predecessors, (59788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:46,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:46,010 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:46,010 INFO L175 Difference]: Start difference. First operand has 895 places, 803 transitions, 2108 flow. Second operand 81 states and 59788 transitions. [2022-11-02 20:52:46,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-11-02 20:52:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-11-02 20:52:46,027 INFO L231 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-11-02 20:52:46,028 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-11-02 20:52:46,028 INFO L287 CegarLoopForPetriNet]: 824 programPoint places, 105 predicate places. [2022-11-02 20:52:46,028 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-11-02 20:52:46,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:46,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:46,036 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:46,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-11-02 20:52:46,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash -150822230, now seen corresponding path program 1 times [2022-11-02 20:52:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333152290] [2022-11-02 20:52:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:46,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:46,369 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:46,369 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:52:46,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-02 20:52:46,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:52:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-11-02 20:52:46,370 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 20:52:46,370 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-02 20:52:46,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-11-02 20:52:46,442 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:52:46,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 853 places, 964 transitions, 2765 flow [2022-11-02 20:52:47,540 INFO L130 PetriNetUnfolder]: 274/2012 cut-off events. [2022-11-02 20:52:47,540 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-11-02 20:52:47,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2012 events. 274/2012 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7610 event pairs, 0 based on Foata normal form. 0/1682 useless extension candidates. Maximal degree in co-relation 2342. Up to 56 conditions per place. [2022-11-02 20:52:47,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 853 places, 964 transitions, 2765 flow [2022-11-02 20:52:47,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 853 places, 964 transitions, 2765 flow [2022-11-02 20:52:47,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:52:47,769 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;@4995c3a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:52:47,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:52:47,776 INFO L130 PetriNetUnfolder]: 4/92 cut-off events. [2022-11-02 20:52:47,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:52:47,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:47,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:47,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash 188590246, now seen corresponding path program 1 times [2022-11-02 20:52:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770362669] [2022-11-02 20:52:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:47,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:47,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770362669] [2022-11-02 20:52:47,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770362669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:47,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:47,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:52:47,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996538134] [2022-11-02 20:52:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:47,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:52:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:52:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:52:47,799 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 770 out of 964 [2022-11-02 20:52:47,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 964 transitions, 2765 flow. Second operand has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:47,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:47,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 770 of 964 [2022-11-02 20:52:47,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:49,094 INFO L130 PetriNetUnfolder]: 0/1710 cut-off events. [2022-11-02 20:52:49,094 INFO L131 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2022-11-02 20:52:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 1710 events. 0/1710 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7298 event pairs, 0 based on Foata normal form. 2226/3880 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-11-02 20:52:49,097 INFO L137 encePairwiseOnDemand]: 798/964 looper letters, 27 selfloop transitions, 0 changer transitions 12/797 dead transitions. [2022-11-02 20:52:49,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 797 transitions, 2485 flow [2022-11-02 20:52:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:52:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:52:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1733 transitions. [2022-11-02 20:52:49,099 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8988589211618258 [2022-11-02 20:52:49,099 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1733 transitions. [2022-11-02 20:52:49,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1733 transitions. [2022-11-02 20:52:49,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:49,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1733 transitions. [2022-11-02 20:52:49,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 866.5) internal successors, (1733), 2 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:49,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:49,101 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:49,102 INFO L175 Difference]: Start difference. First operand has 853 places, 964 transitions, 2765 flow. Second operand 2 states and 1733 transitions. [2022-11-02 20:52:49,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 797 transitions, 2485 flow [2022-11-02 20:52:49,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 797 transitions, 1783 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-11-02 20:52:49,114 INFO L231 Difference]: Finished difference. Result has 853 places, 785 transitions, 1705 flow [2022-11-02 20:52:49,114 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1705, PETRI_PLACES=853, PETRI_TRANSITIONS=785} [2022-11-02 20:52:49,114 INFO L287 CegarLoopForPetriNet]: 853 programPoint places, 0 predicate places. [2022-11-02 20:52:49,115 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 785 transitions, 1705 flow [2022-11-02 20:52:49,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:49,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:49,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-11-02 20:52:49,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash -104812761, now seen corresponding path program 1 times [2022-11-02 20:52:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28942256] [2022-11-02 20:52:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:49,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:49,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28942256] [2022-11-02 20:52:49,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28942256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:49,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:49,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:52:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64475112] [2022-11-02 20:52:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:52:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:52:49,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:52:49,143 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 763 out of 964 [2022-11-02 20:52:49,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 785 transitions, 1705 flow. Second operand has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:49,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:49,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 763 of 964 [2022-11-02 20:52:49,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:50,165 INFO L130 PetriNetUnfolder]: 0/1361 cut-off events. [2022-11-02 20:52:50,165 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-02 20:52:50,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 1361 events. 0/1361 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4802 event pairs, 0 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-11-02 20:52:50,167 INFO L137 encePairwiseOnDemand]: 961/964 looper letters, 36 selfloop transitions, 2 changer transitions 0/789 dead transitions. [2022-11-02 20:52:50,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 789 transitions, 1789 flow [2022-11-02 20:52:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:52:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:52:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2328 transitions. [2022-11-02 20:52:50,170 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8049792531120332 [2022-11-02 20:52:50,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2328 transitions. [2022-11-02 20:52:50,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2328 transitions. [2022-11-02 20:52:50,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:50,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2328 transitions. [2022-11-02 20:52:50,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 776.0) internal successors, (2328), 3 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:50,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:50,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:50,173 INFO L175 Difference]: Start difference. First operand has 853 places, 785 transitions, 1705 flow. Second operand 3 states and 2328 transitions. [2022-11-02 20:52:50,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 789 transitions, 1789 flow [2022-11-02 20:52:50,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1789 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:52:50,181 INFO L231 Difference]: Finished difference. Result has 844 places, 786 transitions, 1717 flow [2022-11-02 20:52:50,181 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=841, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1717, PETRI_PLACES=844, PETRI_TRANSITIONS=786} [2022-11-02 20:52:50,181 INFO L287 CegarLoopForPetriNet]: 853 programPoint places, -9 predicate places. [2022-11-02 20:52:50,181 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 786 transitions, 1717 flow [2022-11-02 20:52:50,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:50,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:50,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:50,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-11-02 20:52:50,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash -144204960, now seen corresponding path program 1 times [2022-11-02 20:52:50,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:50,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600666646] [2022-11-02 20:52:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:50,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600666646] [2022-11-02 20:52:50,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600666646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:50,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449593768] [2022-11-02 20:52:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:50,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:50,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:50,229 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:50,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-02 20:52:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:52:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:51,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:51,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449593768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:51,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:51,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 20:52:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85424102] [2022-11-02 20:52:51,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:52:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:52:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:52:51,038 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-11-02 20:52:51,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 786 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:51,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:51,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-11-02 20:52:51,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:52,176 INFO L130 PetriNetUnfolder]: 0/1335 cut-off events. [2022-11-02 20:52:52,176 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-02 20:52:52,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 1335 events. 0/1335 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4659 event pairs, 0 based on Foata normal form. 2/1337 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-02 20:52:52,180 INFO L137 encePairwiseOnDemand]: 958/964 looper letters, 37 selfloop transitions, 9 changer transitions 0/796 dead transitions. [2022-11-02 20:52:52,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 796 transitions, 1831 flow [2022-11-02 20:52:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:52:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:52:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6906 transitions. [2022-11-02 20:52:52,184 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7959889349930843 [2022-11-02 20:52:52,185 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6906 transitions. [2022-11-02 20:52:52,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6906 transitions. [2022-11-02 20:52:52,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:52,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6906 transitions. [2022-11-02 20:52:52,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 767.3333333333334) internal successors, (6906), 9 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,197 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,197 INFO L175 Difference]: Start difference. First operand has 844 places, 786 transitions, 1717 flow. Second operand 9 states and 6906 transitions. [2022-11-02 20:52:52,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 796 transitions, 1831 flow [2022-11-02 20:52:52,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 796 transitions, 1829 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:52,208 INFO L231 Difference]: Finished difference. Result has 854 places, 792 transitions, 1765 flow [2022-11-02 20:52:52,208 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1765, PETRI_PLACES=854, PETRI_TRANSITIONS=792} [2022-11-02 20:52:52,209 INFO L287 CegarLoopForPetriNet]: 853 programPoint places, 1 predicate places. [2022-11-02 20:52:52,209 INFO L495 AbstractCegarLoop]: Abstraction has has 854 places, 792 transitions, 1765 flow [2022-11-02 20:52:52,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:52,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:52,210 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:52,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:52,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-11-02 20:52:52,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash -588279275, now seen corresponding path program 1 times [2022-11-02 20:52:52,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:52,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677773251] [2022-11-02 20:52:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:52,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:52,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677773251] [2022-11-02 20:52:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677773251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:52,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620962557] [2022-11-02 20:52:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:52,499 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:52,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-02 20:52:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:52:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:53,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620962557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:53,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:53,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:52:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706852373] [2022-11-02 20:52:53,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:53,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:52:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:52:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:52:53,462 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-11-02 20:52:53,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 792 transitions, 1765 flow. Second operand has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:53,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:53,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-11-02 20:52:53,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:54,851 INFO L130 PetriNetUnfolder]: 0/1283 cut-off events. [2022-11-02 20:52:54,851 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-02 20:52:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1283 events. 0/1283 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4299 event pairs, 0 based on Foata normal form. 4/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-02 20:52:54,854 INFO L137 encePairwiseOnDemand]: 958/964 looper letters, 45 selfloop transitions, 21 changer transitions 0/816 dead transitions. [2022-11-02 20:52:54,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 816 transitions, 2005 flow [2022-11-02 20:52:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:52:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:52:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16072 transitions. [2022-11-02 20:52:54,866 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7939142461964038 [2022-11-02 20:52:54,867 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16072 transitions. [2022-11-02 20:52:54,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16072 transitions. [2022-11-02 20:52:54,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:54,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16072 transitions. [2022-11-02 20:52:54,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 765.3333333333334) internal successors, (16072), 21 states have internal predecessors, (16072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:54,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:54,890 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:54,891 INFO L175 Difference]: Start difference. First operand has 854 places, 792 transitions, 1765 flow. Second operand 21 states and 16072 transitions. [2022-11-02 20:52:54,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 816 transitions, 2005 flow [2022-11-02 20:52:54,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 816 transitions, 1991 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:52:54,900 INFO L231 Difference]: Finished difference. Result has 878 places, 805 transitions, 1889 flow [2022-11-02 20:52:54,900 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1889, PETRI_PLACES=878, PETRI_TRANSITIONS=805} [2022-11-02 20:52:54,901 INFO L287 CegarLoopForPetriNet]: 853 programPoint places, 25 predicate places. [2022-11-02 20:52:54,901 INFO L495 AbstractCegarLoop]: Abstraction has has 878 places, 805 transitions, 1889 flow [2022-11-02 20:52:54,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:54,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:54,902 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:54,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-02 20:52:55,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:55,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash -216222325, now seen corresponding path program 1 times [2022-11-02 20:52:55,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:55,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729608756] [2022-11-02 20:52:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:55,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729608756] [2022-11-02 20:52:55,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729608756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450708549] [2022-11-02 20:52:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:55,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:55,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:55,336 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-02 20:52:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:52:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:56,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:56,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450708549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:56,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:56,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-02 20:52:56,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99127859] [2022-11-02 20:52:56,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:56,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:52:56,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:52:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:52:56,513 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-11-02 20:52:56,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 805 transitions, 1889 flow. Second operand has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:56,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:52:56,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-11-02 20:52:56,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:52:58,208 INFO L130 PetriNetUnfolder]: 0/1179 cut-off events. [2022-11-02 20:52:58,209 INFO L131 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-11-02 20:52:58,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1179 events. 0/1179 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3625 event pairs, 0 based on Foata normal form. 8/1187 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-02 20:52:58,211 INFO L137 encePairwiseOnDemand]: 958/964 looper letters, 61 selfloop transitions, 45 changer transitions 0/856 dead transitions. [2022-11-02 20:52:58,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 856 transitions, 2417 flow [2022-11-02 20:52:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:52:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:52:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34404 transitions. [2022-11-02 20:52:58,230 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7930843706777316 [2022-11-02 20:52:58,231 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34404 transitions. [2022-11-02 20:52:58,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34404 transitions. [2022-11-02 20:52:58,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:58,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34404 transitions. [2022-11-02 20:52:58,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 764.5333333333333) internal successors, (34404), 45 states have internal predecessors, (34404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:58,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:58,284 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:58,284 INFO L175 Difference]: Start difference. First operand has 878 places, 805 transitions, 1889 flow. Second operand 45 states and 34404 transitions. [2022-11-02 20:52:58,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 856 transitions, 2417 flow [2022-11-02 20:52:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 856 transitions, 2377 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-02 20:52:58,298 INFO L231 Difference]: Finished difference. Result has 925 places, 830 transitions, 2167 flow [2022-11-02 20:52:58,299 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2167, PETRI_PLACES=925, PETRI_TRANSITIONS=830} [2022-11-02 20:52:58,299 INFO L287 CegarLoopForPetriNet]: 853 programPoint places, 72 predicate places. [2022-11-02 20:52:58,299 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 830 transitions, 2167 flow [2022-11-02 20:52:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:58,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:52:58,303 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:58,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-11-02 20:52:58,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:58,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:52:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1474444455, now seen corresponding path program 1 times [2022-11-02 20:52:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141690097] [2022-11-02 20:52:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:58,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:59,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141690097] [2022-11-02 20:52:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141690097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139775180] [2022-11-02 20:52:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:59,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:59,103 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:59,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f46707b-d7c4-42d2-8c20-0aa2f331d717/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process