./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/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_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/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_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/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 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --- 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 20:36:02,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:36:02,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:36:02,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:36:02,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:36:02,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:36:02,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:36:02,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:36:02,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:36:02,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:36:02,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:36:02,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:36:02,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:36:02,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:36:02,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:36:02,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:36:02,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:36:02,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:36:02,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:36:02,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:36:02,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:36:02,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:36:02,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:36:02,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:36:02,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:36:02,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:36:02,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:36:02,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:36:02,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:36:02,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:36:02,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:36:02,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:36:02,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:36:02,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:36:02,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:36:02,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:36:02,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:36:02,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:36:02,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:36:02,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:36:02,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:36:02,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:36:02,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:36:02,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:36:02,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:36:02,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:36:02,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:36:02,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:36:02,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:36:02,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:36:02,618 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:36:02,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:36:02,620 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:36:02,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:36:02,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:36:02,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:36:02,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:36:02,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:36:02,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:36:02,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:36:02,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:36:02,622 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:36:02,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:36:02,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:36:02,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:36:02,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:36:02,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:02,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:36:02,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:36:02,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:36:02,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:36:02,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:36:02,626 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:36:02,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:36:02,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:36:02,627 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_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 [2022-11-02 20:36:03,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:36:03,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:36:03,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:36:03,051 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:36:03,059 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:36:03,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2022-11-02 20:36:03,143 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/data/78f66399d/f5e4f7f09d004efebe7811dd106e2286/FLAG447170dc6 [2022-11-02 20:36:03,747 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:36:03,748 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/sv-benchmarks/c/pthread/triangular-longer-2.i [2022-11-02 20:36:03,768 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/data/78f66399d/f5e4f7f09d004efebe7811dd106e2286/FLAG447170dc6 [2022-11-02 20:36:04,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/data/78f66399d/f5e4f7f09d004efebe7811dd106e2286 [2022-11-02 20:36:04,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:36:04,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:36:04,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:04,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:36:04,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:36:04,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7067f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04, skipping insertion in model container [2022-11-02 20:36:04,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:36:04,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:36:04,509 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_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2022-11-02 20:36:04,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:04,528 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:36:04,605 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_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2022-11-02 20:36:04,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:04,670 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:36:04,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04 WrapperNode [2022-11-02 20:36:04,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:04,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:04,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:36:04,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:36:04,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,749 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-11-02 20:36:04,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:04,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:36:04,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:36:04,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:36:04,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:36:04,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:36:04,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:36:04,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:36:04,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (1/1) ... [2022-11-02 20:36:04,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:04,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:36:04,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:36:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-02 20:36:04,915 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-02 20:36:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-02 20:36:04,915 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-02 20:36:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:36:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:36:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:36:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:36:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:36:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:36:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:36:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:36:04,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:36:04,919 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 20:36:05,118 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:36:05,121 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:36:05,459 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:36:05,467 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:36:05,467 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:36:05,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:05 BoogieIcfgContainer [2022-11-02 20:36:05,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:36:05,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:36:05,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:36:05,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:36:05,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:36:04" (1/3) ... [2022-11-02 20:36:05,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ddbd02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:36:05, skipping insertion in model container [2022-11-02 20:36:05,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:04" (2/3) ... [2022-11-02 20:36:05,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ddbd02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:36:05, skipping insertion in model container [2022-11-02 20:36:05,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:05" (3/3) ... [2022-11-02 20:36:05,481 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2022-11-02 20:36:05,491 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:36:05,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:36:05,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:36:05,505 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:36:05,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-02 20:36:05,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-11-02 20:36:05,725 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-02 20:36:05,729 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:36:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-11-02 20:36:05,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-11-02 20:36:05,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-11-02 20:36:05,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:36:05,766 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;@4c91cbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:36:05,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:36:05,785 INFO L130 PetriNetUnfolder]: 5/60 cut-off events. [2022-11-02 20:36:05,785 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:36:05,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:05,786 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] [2022-11-02 20:36:05,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-11-02 20:36:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:05,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434947488] [2022-11-02 20:36:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:06,789 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 20:36:06,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:06,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434947488] [2022-11-02 20:36:06,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434947488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:06,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:06,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:36:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073095738] [2022-11-02 20:36:06,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:06,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:36:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:36:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:36:06,880 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:06,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:06,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:06,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:06,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:07,206 INFO L130 PetriNetUnfolder]: 42/203 cut-off events. [2022-11-02 20:36:07,207 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:36:07,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 766 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-11-02 20:36:07,215 INFO L137 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-11-02 20:36:07,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-11-02 20:36:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:36:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:36:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-11-02 20:36:07,243 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-11-02 20:36:07,244 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-11-02 20:36:07,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-11-02 20:36:07,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:07,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-11-02 20:36:07,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,271 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,274 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-11-02 20:36:07,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-11-02 20:36:07,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:36:07,283 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-11-02 20:36:07,286 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-11-02 20:36:07,290 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-11-02 20:36:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-11-02 20:36:07,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:07,292 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] [2022-11-02 20:36:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:36:07,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-11-02 20:36:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466270498] [2022-11-02 20:36:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:07,691 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 20:36:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:07,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466270498] [2022-11-02 20:36:07,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466270498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:07,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:07,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:36:07,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697343141] [2022-11-02 20:36:07,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:36:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:36:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:36:07,696 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:07,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:07,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:07,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:07,895 INFO L130 PetriNetUnfolder]: 46/218 cut-off events. [2022-11-02 20:36:07,896 INFO L131 PetriNetUnfolder]: For 114/119 co-relation queries the response was YES. [2022-11-02 20:36:07,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 114/119 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-11-02 20:36:07,902 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-11-02 20:36:07,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-11-02 20:36:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:36:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 20:36:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-11-02 20:36:07,906 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-11-02 20:36:07,906 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-11-02 20:36:07,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-11-02 20:36:07,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:07,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-11-02 20:36:07,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,912 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,913 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-11-02 20:36:07,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-11-02 20:36:07,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:36:07,925 INFO L231 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-11-02 20:36:07,926 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-11-02 20:36:07,927 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-11-02 20:36:07,927 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-11-02 20:36:07,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:07,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:07,928 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] [2022-11-02 20:36:07,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:36:07,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-11-02 20:36:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:07,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292568679] [2022-11-02 20:36:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:08,267 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 20:36:08,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:08,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292568679] [2022-11-02 20:36:08,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292568679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:08,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:08,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:36:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186161483] [2022-11-02 20:36:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:08,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:36:08,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:36:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:36:08,276 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:08,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:08,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:08,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:08,425 INFO L130 PetriNetUnfolder]: 37/196 cut-off events. [2022-11-02 20:36:08,425 INFO L131 PetriNetUnfolder]: For 264/275 co-relation queries the response was YES. [2022-11-02 20:36:08,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 264/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 656 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-11-02 20:36:08,429 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-11-02 20:36:08,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-11-02 20:36:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:36:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:36:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-11-02 20:36:08,433 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-11-02 20:36:08,433 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-11-02 20:36:08,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-11-02 20:36:08,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:08,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-11-02 20:36:08,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,451 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,452 INFO L175 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-11-02 20:36:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-11-02 20:36:08,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-11-02 20:36:08,463 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-11-02 20:36:08,464 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-11-02 20:36:08,467 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-11-02 20:36:08,467 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-11-02 20:36:08,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:08,468 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] [2022-11-02 20:36:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:36:08,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-11-02 20:36:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:08,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769946843] [2022-11-02 20:36:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:08,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:08,754 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 20:36:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769946843] [2022-11-02 20:36:08,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769946843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:08,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:08,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:36:08,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433846776] [2022-11-02 20:36:08,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:36:08,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:08,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:36:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:36:08,764 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:08,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:08,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:08,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:08,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:08,992 INFO L130 PetriNetUnfolder]: 34/213 cut-off events. [2022-11-02 20:36:08,992 INFO L131 PetriNetUnfolder]: For 308/344 co-relation queries the response was YES. [2022-11-02 20:36:08,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 213 events. 34/213 cut-off events. For 308/344 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 790 event pairs, 0 based on Foata normal form. 25/218 useless extension candidates. Maximal degree in co-relation 426. Up to 37 conditions per place. [2022-11-02 20:36:08,995 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 21 selfloop transitions, 15 changer transitions 11/92 dead transitions. [2022-11-02 20:36:08,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 536 flow [2022-11-02 20:36:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:36:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:36:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 585 transitions. [2022-11-02 20:36:08,998 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8357142857142857 [2022-11-02 20:36:08,999 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 585 transitions. [2022-11-02 20:36:08,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 585 transitions. [2022-11-02 20:36:08,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:09,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 585 transitions. [2022-11-02 20:36:09,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.5) internal successors, (585), 10 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,009 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,009 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 10 states and 585 transitions. [2022-11-02 20:36:09,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 536 flow [2022-11-02 20:36:09,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 511 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-02 20:36:09,018 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 370 flow [2022-11-02 20:36:09,018 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=370, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2022-11-02 20:36:09,020 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 25 predicate places. [2022-11-02 20:36:09,020 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 370 flow [2022-11-02 20:36:09,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:09,028 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] [2022-11-02 20:36:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:36:09,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-11-02 20:36:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:09,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575332730] [2022-11-02 20:36:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:09,281 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 20:36:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:09,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575332730] [2022-11-02 20:36:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575332730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:09,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:09,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:36:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149817801] [2022-11-02 20:36:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:09,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:36:09,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:36:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:36:09,285 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:09,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:09,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:09,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:09,459 INFO L130 PetriNetUnfolder]: 47/248 cut-off events. [2022-11-02 20:36:09,460 INFO L131 PetriNetUnfolder]: For 546/567 co-relation queries the response was YES. [2022-11-02 20:36:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 248 events. 47/248 cut-off events. For 546/567 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 964 event pairs, 1 based on Foata normal form. 19/243 useless extension candidates. Maximal degree in co-relation 561. Up to 55 conditions per place. [2022-11-02 20:36:09,464 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 25 selfloop transitions, 23 changer transitions 8/101 dead transitions. [2022-11-02 20:36:09,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 694 flow [2022-11-02 20:36:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:36:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:36:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-11-02 20:36:09,467 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-11-02 20:36:09,467 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-11-02 20:36:09,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-11-02 20:36:09,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:09,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-11-02 20:36:09,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,472 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,472 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 370 flow. Second operand 11 states and 644 transitions. [2022-11-02 20:36:09,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 694 flow [2022-11-02 20:36:09,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 647 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-02 20:36:09,479 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 485 flow [2022-11-02 20:36:09,479 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=485, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2022-11-02 20:36:09,480 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-11-02 20:36:09,480 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 485 flow [2022-11-02 20:36:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:09,481 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] [2022-11-02 20:36:09,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:36:09,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:09,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-11-02 20:36:09,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:09,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343758820] [2022-11-02 20:36:09,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:09,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:09,681 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 20:36:09,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:09,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343758820] [2022-11-02 20:36:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343758820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:09,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:36:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009933055] [2022-11-02 20:36:09,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:09,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:36:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:36:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:36:09,685 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:09,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:09,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:09,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:09,931 INFO L130 PetriNetUnfolder]: 41/246 cut-off events. [2022-11-02 20:36:09,931 INFO L131 PetriNetUnfolder]: For 953/980 co-relation queries the response was YES. [2022-11-02 20:36:09,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 246 events. 41/246 cut-off events. For 953/980 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 993 event pairs, 1 based on Foata normal form. 24/246 useless extension candidates. Maximal degree in co-relation 667. Up to 51 conditions per place. [2022-11-02 20:36:09,935 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 23 changer transitions 11/102 dead transitions. [2022-11-02 20:36:09,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 868 flow [2022-11-02 20:36:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:36:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 20:36:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-11-02 20:36:09,938 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-11-02 20:36:09,938 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-11-02 20:36:09,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-11-02 20:36:09,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:09,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-11-02 20:36:09,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,944 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,944 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 485 flow. Second operand 11 states and 638 transitions. [2022-11-02 20:36:09,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 868 flow [2022-11-02 20:36:09,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 102 transitions, 805 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-11-02 20:36:09,968 INFO L231 Difference]: Finished difference. Result has 111 places, 85 transitions, 555 flow [2022-11-02 20:36:09,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=555, PETRI_PLACES=111, PETRI_TRANSITIONS=85} [2022-11-02 20:36:09,971 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 41 predicate places. [2022-11-02 20:36:09,971 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 85 transitions, 555 flow [2022-11-02 20:36:09,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:09,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:09,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:09,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:36:09,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:09,974 INFO L85 PathProgramCache]: Analyzing trace with hash -495311077, now seen corresponding path program 1 times [2022-11-02 20:36:09,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:09,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204436818] [2022-11-02 20:36:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:10,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204436818] [2022-11-02 20:36:10,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204436818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156404131] [2022-11-02 20:36:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:10,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:10,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:10,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:10,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:36:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:36:10,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:10,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:10,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156404131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:10,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:10,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-11-02 20:36:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604922506] [2022-11-02 20:36:10,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:10,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:36:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:36:10,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:36:10,878 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:10,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 85 transitions, 555 flow. Second operand has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:10,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:10,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:10,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:11,417 INFO L130 PetriNetUnfolder]: 55/317 cut-off events. [2022-11-02 20:36:11,417 INFO L131 PetriNetUnfolder]: For 1631/1674 co-relation queries the response was YES. [2022-11-02 20:36:11,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 317 events. 55/317 cut-off events. For 1631/1674 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1285 event pairs, 1 based on Foata normal form. 25/311 useless extension candidates. Maximal degree in co-relation 943. Up to 67 conditions per place. [2022-11-02 20:36:11,422 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-11-02 20:36:11,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 124 transitions, 1327 flow [2022-11-02 20:36:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:36:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-02 20:36:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-11-02 20:36:11,427 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-11-02 20:36:11,427 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-11-02 20:36:11,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-11-02 20:36:11,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:11,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-11-02 20:36:11,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:11,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:11,436 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:11,436 INFO L175 Difference]: Start difference. First operand has 111 places, 85 transitions, 555 flow. Second operand 20 states and 1159 transitions. [2022-11-02 20:36:11,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 124 transitions, 1327 flow [2022-11-02 20:36:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 1190 flow, removed 48 selfloop flow, removed 10 redundant places. [2022-11-02 20:36:11,448 INFO L231 Difference]: Finished difference. Result has 127 places, 101 transitions, 862 flow [2022-11-02 20:36:11,448 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=862, PETRI_PLACES=127, PETRI_TRANSITIONS=101} [2022-11-02 20:36:11,449 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2022-11-02 20:36:11,449 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 101 transitions, 862 flow [2022-11-02 20:36:11,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:11,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:11,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1] [2022-11-02 20:36:11,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:11,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-11-02 20:36:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:11,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521460701] [2022-11-02 20:36:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:11,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521460701] [2022-11-02 20:36:11,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521460701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:11,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315931476] [2022-11-02 20:36:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:11,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:11,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:11,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:11,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:36:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:36:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:12,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:12,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315931476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:12,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:12,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-11-02 20:36:12,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090199189] [2022-11-02 20:36:12,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:12,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:36:12,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:12,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:36:12,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:36:12,600 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:12,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 101 transitions, 862 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:12,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:12,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:12,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:13,161 INFO L130 PetriNetUnfolder]: 77/442 cut-off events. [2022-11-02 20:36:13,161 INFO L131 PetriNetUnfolder]: For 3502/3567 co-relation queries the response was YES. [2022-11-02 20:36:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 442 events. 77/442 cut-off events. For 3502/3567 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1832 event pairs, 0 based on Foata normal form. 26/424 useless extension candidates. Maximal degree in co-relation 1531. Up to 103 conditions per place. [2022-11-02 20:36:13,169 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-11-02 20:36:13,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 156 transitions, 2114 flow [2022-11-02 20:36:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:36:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-02 20:36:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-11-02 20:36:13,176 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-11-02 20:36:13,176 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-11-02 20:36:13,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-11-02 20:36:13,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:13,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-11-02 20:36:13,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:13,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:13,189 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:13,189 INFO L175 Difference]: Start difference. First operand has 127 places, 101 transitions, 862 flow. Second operand 25 states and 1450 transitions. [2022-11-02 20:36:13,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 156 transitions, 2114 flow [2022-11-02 20:36:13,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 156 transitions, 1699 flow, removed 190 selfloop flow, removed 12 redundant places. [2022-11-02 20:36:13,213 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 992 flow [2022-11-02 20:36:13,213 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=992, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2022-11-02 20:36:13,217 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 83 predicate places. [2022-11-02 20:36:13,217 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 992 flow [2022-11-02 20:36:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:13,218 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1] [2022-11-02 20:36:13,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:13,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:36:13,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:13,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1596067542, now seen corresponding path program 2 times [2022-11-02 20:36:13,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154807468] [2022-11-02 20:36:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:13,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:13,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:13,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154807468] [2022-11-02 20:36:13,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154807468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:13,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380144104] [2022-11-02 20:36:13,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:36:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:13,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:13,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:36:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:36:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:36:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:14,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380144104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:14,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:14,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-11-02 20:36:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715120383] [2022-11-02 20:36:14,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:14,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:36:14,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:36:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:36:14,474 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:14,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 992 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:14,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:14,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:14,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:15,396 INFO L130 PetriNetUnfolder]: 115/731 cut-off events. [2022-11-02 20:36:15,396 INFO L131 PetriNetUnfolder]: For 12523/12668 co-relation queries the response was YES. [2022-11-02 20:36:15,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 731 events. 115/731 cut-off events. For 12523/12668 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4339 event pairs, 0 based on Foata normal form. 28/685 useless extension candidates. Maximal degree in co-relation 2917. Up to 151 conditions per place. [2022-11-02 20:36:15,410 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 59 selfloop transitions, 74 changer transitions 26/204 dead transitions. [2022-11-02 20:36:15,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 204 transitions, 3336 flow [2022-11-02 20:36:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:36:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 20:36:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1851 transitions. [2022-11-02 20:36:15,418 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8263392857142857 [2022-11-02 20:36:15,418 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1851 transitions. [2022-11-02 20:36:15,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1851 transitions. [2022-11-02 20:36:15,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:15,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1851 transitions. [2022-11-02 20:36:15,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.84375) internal successors, (1851), 32 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:15,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:15,437 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:15,437 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 992 flow. Second operand 32 states and 1851 transitions. [2022-11-02 20:36:15,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 204 transitions, 3336 flow [2022-11-02 20:36:15,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 204 transitions, 2811 flow, removed 253 selfloop flow, removed 13 redundant places. [2022-11-02 20:36:15,492 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 1757 flow [2022-11-02 20:36:15,492 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1757, PETRI_PLACES=185, PETRI_TRANSITIONS=153} [2022-11-02 20:36:15,493 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 115 predicate places. [2022-11-02 20:36:15,493 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 1757 flow [2022-11-02 20:36:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:15,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:15,494 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1] [2022-11-02 20:36:15,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:15,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2022-11-02 20:36:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:15,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602866677] [2022-11-02 20:36:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:15,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:15,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:15,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602866677] [2022-11-02 20:36:15,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602866677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:15,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708192816] [2022-11-02 20:36:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:36:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:15,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:15,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:36:16,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:36:16,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:36:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:16,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708192816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:16,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:16,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-11-02 20:36:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229563231] [2022-11-02 20:36:16,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:16,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:36:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:36:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:36:16,429 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:16,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 1757 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:16,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:16,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:16,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:17,750 INFO L130 PetriNetUnfolder]: 156/1010 cut-off events. [2022-11-02 20:36:17,751 INFO L131 PetriNetUnfolder]: For 31025/31141 co-relation queries the response was YES. [2022-11-02 20:36:17,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1010 events. 156/1010 cut-off events. For 31025/31141 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6772 event pairs, 0 based on Foata normal form. 39/947 useless extension candidates. Maximal degree in co-relation 4824. Up to 201 conditions per place. [2022-11-02 20:36:17,770 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 49 selfloop transitions, 130 changer transitions 26/250 dead transitions. [2022-11-02 20:36:17,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 250 transitions, 5261 flow [2022-11-02 20:36:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:36:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-02 20:36:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-11-02 20:36:17,775 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-11-02 20:36:17,775 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-11-02 20:36:17,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-11-02 20:36:17,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:17,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-11-02 20:36:17,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:17,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:17,793 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:17,793 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 1757 flow. Second operand 37 states and 2143 transitions. [2022-11-02 20:36:17,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 250 transitions, 5261 flow [2022-11-02 20:36:17,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 250 transitions, 4482 flow, removed 379 selfloop flow, removed 15 redundant places. [2022-11-02 20:36:17,949 INFO L231 Difference]: Finished difference. Result has 221 places, 195 transitions, 2799 flow [2022-11-02 20:36:17,950 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2799, PETRI_PLACES=221, PETRI_TRANSITIONS=195} [2022-11-02 20:36:17,951 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 151 predicate places. [2022-11-02 20:36:17,951 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 195 transitions, 2799 flow [2022-11-02 20:36:17,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:17,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:17,952 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2022-11-02 20:36:17,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:18,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:36:18,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1314655524, now seen corresponding path program 4 times [2022-11-02 20:36:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:18,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610658306] [2022-11-02 20:36:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:18,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:18,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610658306] [2022-11-02 20:36:18,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610658306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:18,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560436868] [2022-11-02 20:36:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:36:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:18,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:18,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:18,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:36:18,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:36:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:36:18,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:18,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:19,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560436868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:19,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:19,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-11-02 20:36:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282233416] [2022-11-02 20:36:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:19,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:36:19,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:36:19,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:36:19,281 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:19,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 195 transitions, 2799 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:19,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:19,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:19,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:21,371 INFO L130 PetriNetUnfolder]: 218/1424 cut-off events. [2022-11-02 20:36:21,372 INFO L131 PetriNetUnfolder]: For 75949/76121 co-relation queries the response was YES. [2022-11-02 20:36:21,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8516 conditions, 1424 events. 218/1424 cut-off events. For 75949/76121 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9430 event pairs, 1 based on Foata normal form. 41/1317 useless extension candidates. Maximal degree in co-relation 8406. Up to 281 conditions per place. [2022-11-02 20:36:21,408 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 185 changer transitions 32/324 dead transitions. [2022-11-02 20:36:21,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 324 transitions, 9330 flow [2022-11-02 20:36:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-02 20:36:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-02 20:36:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2893 transitions. [2022-11-02 20:36:21,414 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8265714285714286 [2022-11-02 20:36:21,415 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2893 transitions. [2022-11-02 20:36:21,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2893 transitions. [2022-11-02 20:36:21,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:21,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2893 transitions. [2022-11-02 20:36:21,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.86) internal successors, (2893), 50 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:21,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:21,433 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:21,433 INFO L175 Difference]: Start difference. First operand has 221 places, 195 transitions, 2799 flow. Second operand 50 states and 2893 transitions. [2022-11-02 20:36:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 324 transitions, 9330 flow [2022-11-02 20:36:21,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 6859 flow, removed 1209 selfloop flow, removed 20 redundant places. [2022-11-02 20:36:21,654 INFO L231 Difference]: Finished difference. Result has 272 places, 256 transitions, 4116 flow [2022-11-02 20:36:21,655 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4116, PETRI_PLACES=272, PETRI_TRANSITIONS=256} [2022-11-02 20:36:21,655 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 202 predicate places. [2022-11-02 20:36:21,655 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 256 transitions, 4116 flow [2022-11-02 20:36:21,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:21,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:21,657 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 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] [2022-11-02 20:36:21,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:21,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:36:21,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1180345628, now seen corresponding path program 5 times [2022-11-02 20:36:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:21,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354609720] [2022-11-02 20:36:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354609720] [2022-11-02 20:36:22,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354609720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:22,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835038736] [2022-11-02 20:36:22,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:36:22,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:22,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:22,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:22,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:36:22,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-02 20:36:22,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:36:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:23,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835038736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:24,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:24,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-11-02 20:36:24,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294555810] [2022-11-02 20:36:24,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:24,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:36:24,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:36:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:36:24,412 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:24,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 256 transitions, 4116 flow. Second operand has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:24,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:24,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:24,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:25,924 INFO L130 PetriNetUnfolder]: 226/1515 cut-off events. [2022-11-02 20:36:25,924 INFO L131 PetriNetUnfolder]: For 100086/100368 co-relation queries the response was YES. [2022-11-02 20:36:25,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9559 conditions, 1515 events. 226/1515 cut-off events. For 100086/100368 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9870 event pairs, 0 based on Foata normal form. 24/1377 useless extension candidates. Maximal degree in co-relation 9428. Up to 305 conditions per place. [2022-11-02 20:36:25,964 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 206 selfloop transitions, 47 changer transitions 20/318 dead transitions. [2022-11-02 20:36:25,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 318 transitions, 8460 flow [2022-11-02 20:36:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:36:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:36:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1902 transitions. [2022-11-02 20:36:25,969 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-11-02 20:36:25,970 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1902 transitions. [2022-11-02 20:36:25,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1902 transitions. [2022-11-02 20:36:25,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:25,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1902 transitions. [2022-11-02 20:36:25,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.63636363636363) internal successors, (1902), 33 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 20:36:25,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 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 20:36:25,982 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 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 20:36:25,982 INFO L175 Difference]: Start difference. First operand has 272 places, 256 transitions, 4116 flow. Second operand 33 states and 1902 transitions. [2022-11-02 20:36:25,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 318 transitions, 8460 flow [2022-11-02 20:36:26,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 318 transitions, 6778 flow, removed 814 selfloop flow, removed 18 redundant places. [2022-11-02 20:36:26,299 INFO L231 Difference]: Finished difference. Result has 290 places, 272 transitions, 3941 flow [2022-11-02 20:36:26,300 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3941, PETRI_PLACES=290, PETRI_TRANSITIONS=272} [2022-11-02 20:36:26,300 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 220 predicate places. [2022-11-02 20:36:26,300 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 272 transitions, 3941 flow [2022-11-02 20:36:26,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:26,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:26,303 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 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] [2022-11-02 20:36:26,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 20:36:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:36:26,530 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash 44410976, now seen corresponding path program 6 times [2022-11-02 20:36:26,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:26,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484281774] [2022-11-02 20:36:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:26,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484281774] [2022-11-02 20:36:27,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484281774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:27,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012015928] [2022-11-02 20:36:27,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:36:27,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:27,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:27,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:36:27,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-02 20:36:27,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:36:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:28,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:36:29,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012015928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:29,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:29,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2022-11-02 20:36:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106797862] [2022-11-02 20:36:29,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:29,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:36:29,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:29,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:36:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:36:29,190 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:29,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 272 transitions, 3941 flow. Second operand has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:29,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:29,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:29,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:31,723 INFO L130 PetriNetUnfolder]: 282/2047 cut-off events. [2022-11-02 20:36:31,724 INFO L131 PetriNetUnfolder]: For 134096/134301 co-relation queries the response was YES. [2022-11-02 20:36:31,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12093 conditions, 2047 events. 282/2047 cut-off events. For 134096/134301 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 14712 event pairs, 0 based on Foata normal form. 32/1858 useless extension candidates. Maximal degree in co-relation 11958. Up to 415 conditions per place. [2022-11-02 20:36:31,784 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 175 selfloop transitions, 160 changer transitions 20/400 dead transitions. [2022-11-02 20:36:31,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 400 transitions, 9980 flow [2022-11-02 20:36:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 20:36:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-02 20:36:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3101 transitions. [2022-11-02 20:36:31,797 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8203703703703704 [2022-11-02 20:36:31,798 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3101 transitions. [2022-11-02 20:36:31,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3101 transitions. [2022-11-02 20:36:31,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:31,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3101 transitions. [2022-11-02 20:36:31,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.425925925925924) internal successors, (3101), 54 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:31,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 70.0) internal successors, (3850), 55 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:31,822 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 70.0) internal successors, (3850), 55 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:31,823 INFO L175 Difference]: Start difference. First operand has 290 places, 272 transitions, 3941 flow. Second operand 54 states and 3101 transitions. [2022-11-02 20:36:31,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 400 transitions, 9980 flow [2022-11-02 20:36:32,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 400 transitions, 9241 flow, removed 342 selfloop flow, removed 21 redundant places. [2022-11-02 20:36:32,211 INFO L231 Difference]: Finished difference. Result has 334 places, 328 transitions, 5205 flow [2022-11-02 20:36:32,212 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5205, PETRI_PLACES=334, PETRI_TRANSITIONS=328} [2022-11-02 20:36:32,213 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 264 predicate places. [2022-11-02 20:36:32,213 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 328 transitions, 5205 flow [2022-11-02 20:36:32,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:32,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:32,215 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 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] [2022-11-02 20:36:32,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:32,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 511528016, now seen corresponding path program 7 times [2022-11-02 20:36:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327142817] [2022-11-02 20:36:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:32,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:33,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:33,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327142817] [2022-11-02 20:36:33,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327142817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:33,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148976704] [2022-11-02 20:36:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:36:33,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:33,184 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:33,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:36:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:36:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:33,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:34,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148976704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:34,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:34,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-11-02 20:36:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256083872] [2022-11-02 20:36:34,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:36:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:36:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:36:34,684 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:34,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 328 transitions, 5205 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:34,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:34,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:34,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:37,688 INFO L130 PetriNetUnfolder]: 386/2876 cut-off events. [2022-11-02 20:36:37,689 INFO L131 PetriNetUnfolder]: For 239619/240061 co-relation queries the response was YES. [2022-11-02 20:36:37,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18844 conditions, 2876 events. 386/2876 cut-off events. For 239619/240061 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 23625 event pairs, 0 based on Foata normal form. 45/2611 useless extension candidates. Maximal degree in co-relation 18695. Up to 611 conditions per place. [2022-11-02 20:36:37,759 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 131 selfloop transitions, 315 changer transitions 26/517 dead transitions. [2022-11-02 20:36:37,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 517 transitions, 14266 flow [2022-11-02 20:36:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:36:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-02 20:36:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3452 transitions. [2022-11-02 20:36:37,767 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8219047619047619 [2022-11-02 20:36:37,767 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3452 transitions. [2022-11-02 20:36:37,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3452 transitions. [2022-11-02 20:36:37,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:37,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3452 transitions. [2022-11-02 20:36:37,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.53333333333333) internal successors, (3452), 60 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:37,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:37,787 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:37,788 INFO L175 Difference]: Start difference. First operand has 334 places, 328 transitions, 5205 flow. Second operand 60 states and 3452 transitions. [2022-11-02 20:36:37,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 517 transitions, 14266 flow [2022-11-02 20:36:38,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 517 transitions, 12820 flow, removed 625 selfloop flow, removed 30 redundant places. [2022-11-02 20:36:38,388 INFO L231 Difference]: Finished difference. Result has 379 places, 433 transitions, 7732 flow [2022-11-02 20:36:38,389 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=7732, PETRI_PLACES=379, PETRI_TRANSITIONS=433} [2022-11-02 20:36:38,390 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 309 predicate places. [2022-11-02 20:36:38,390 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 433 transitions, 7732 flow [2022-11-02 20:36:38,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:38,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:38,391 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 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] [2022-11-02 20:36:38,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:38,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:38,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1050196294, now seen corresponding path program 8 times [2022-11-02 20:36:38,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:38,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318899566] [2022-11-02 20:36:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:38,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:39,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:39,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318899566] [2022-11-02 20:36:39,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318899566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:39,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149736928] [2022-11-02 20:36:39,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:36:39,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:39,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:39,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:36:39,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:36:39,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:36:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:39,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:40,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149736928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:40,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:40,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2022-11-02 20:36:40,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947827685] [2022-11-02 20:36:40,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:40,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:36:40,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:36:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 20:36:40,785 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:40,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 433 transitions, 7732 flow. Second operand has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:40,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:40,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:40,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:44,667 INFO L130 PetriNetUnfolder]: 477/3573 cut-off events. [2022-11-02 20:36:44,667 INFO L131 PetriNetUnfolder]: For 419303/419676 co-relation queries the response was YES. [2022-11-02 20:36:44,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26449 conditions, 3573 events. 477/3573 cut-off events. For 419303/419676 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31666 event pairs, 0 based on Foata normal form. 59/3251 useless extension candidates. Maximal degree in co-relation 26283. Up to 775 conditions per place. [2022-11-02 20:36:44,792 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 104 selfloop transitions, 432 changer transitions 26/607 dead transitions. [2022-11-02 20:36:44,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 607 transitions, 17714 flow [2022-11-02 20:36:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:36:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-02 20:36:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3457 transitions. [2022-11-02 20:36:44,810 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8230952380952381 [2022-11-02 20:36:44,810 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3457 transitions. [2022-11-02 20:36:44,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3457 transitions. [2022-11-02 20:36:44,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:44,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3457 transitions. [2022-11-02 20:36:44,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.61666666666667) internal successors, (3457), 60 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 20:36:44,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:44,842 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:44,843 INFO L175 Difference]: Start difference. First operand has 379 places, 433 transitions, 7732 flow. Second operand 60 states and 3457 transitions. [2022-11-02 20:36:44,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 607 transitions, 17714 flow [2022-11-02 20:36:46,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 607 transitions, 15091 flow, removed 1173 selfloop flow, removed 31 redundant places. [2022-11-02 20:36:46,282 INFO L231 Difference]: Finished difference. Result has 423 places, 528 transitions, 9834 flow [2022-11-02 20:36:46,283 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9834, PETRI_PLACES=423, PETRI_TRANSITIONS=528} [2022-11-02 20:36:46,284 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 353 predicate places. [2022-11-02 20:36:46,284 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 528 transitions, 9834 flow [2022-11-02 20:36:46,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:46,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:46,286 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 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] [2022-11-02 20:36:46,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:46,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:36:46,501 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2140774246, now seen corresponding path program 9 times [2022-11-02 20:36:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:46,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367378476] [2022-11-02 20:36:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:46,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:47,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:47,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367378476] [2022-11-02 20:36:47,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367378476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:47,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982927515] [2022-11-02 20:36:47,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:36:47,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:47,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:47,106 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:47,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:36:47,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-02 20:36:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:36:47,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:48,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982927515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:48,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:48,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-11-02 20:36:48,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572543224] [2022-11-02 20:36:48,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:36:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:36:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:36:48,152 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:48,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 528 transitions, 9834 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:48,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:48,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:48,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:51,693 INFO L130 PetriNetUnfolder]: 561/4100 cut-off events. [2022-11-02 20:36:51,693 INFO L131 PetriNetUnfolder]: For 586519/587024 co-relation queries the response was YES. [2022-11-02 20:36:51,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32909 conditions, 4100 events. 561/4100 cut-off events. For 586519/587024 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 37616 event pairs, 0 based on Foata normal form. 75/3739 useless extension candidates. Maximal degree in co-relation 32727. Up to 893 conditions per place. [2022-11-02 20:36:51,818 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 96 selfloop transitions, 515 changer transitions 26/682 dead transitions. [2022-11-02 20:36:51,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 682 transitions, 20237 flow [2022-11-02 20:36:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:36:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-02 20:36:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3468 transitions. [2022-11-02 20:36:51,934 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8257142857142857 [2022-11-02 20:36:51,935 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3468 transitions. [2022-11-02 20:36:51,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3468 transitions. [2022-11-02 20:36:51,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:51,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3468 transitions. [2022-11-02 20:36:51,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.8) internal successors, (3468), 60 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:51,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:51,962 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:51,962 INFO L175 Difference]: Start difference. First operand has 423 places, 528 transitions, 9834 flow. Second operand 60 states and 3468 transitions. [2022-11-02 20:36:51,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 682 transitions, 20237 flow [2022-11-02 20:36:53,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 682 transitions, 17610 flow, removed 1121 selfloop flow, removed 34 redundant places. [2022-11-02 20:36:53,311 INFO L231 Difference]: Finished difference. Result has 461 places, 598 transitions, 11506 flow [2022-11-02 20:36:53,312 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=11506, PETRI_PLACES=461, PETRI_TRANSITIONS=598} [2022-11-02 20:36:53,313 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 391 predicate places. [2022-11-02 20:36:53,313 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 598 transitions, 11506 flow [2022-11-02 20:36:53,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:53,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:36:53,314 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 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] [2022-11-02 20:36:53,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-02 20:36:53,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:53,525 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:36:53,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:53,526 INFO L85 PathProgramCache]: Analyzing trace with hash -525094214, now seen corresponding path program 10 times [2022-11-02 20:36:53,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:53,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134162175] [2022-11-02 20:36:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:53,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:54,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134162175] [2022-11-02 20:36:54,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134162175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308244255] [2022-11-02 20:36:54,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:36:54,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:54,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:54,235 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:54,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:36:54,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:36:54,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:36:54,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:54,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:55,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308244255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:55,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:55,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-11-02 20:36:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665697535] [2022-11-02 20:36:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:55,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:36:55,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:36:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:36:55,347 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:36:55,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 598 transitions, 11506 flow. Second operand has 44 states, 44 states have (on average 56.25) internal successors, (2475), 44 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:55,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:36:55,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:36:55,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:36:58,551 INFO L130 PetriNetUnfolder]: 570/4119 cut-off events. [2022-11-02 20:36:58,552 INFO L131 PetriNetUnfolder]: For 705962/706443 co-relation queries the response was YES. [2022-11-02 20:36:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35225 conditions, 4119 events. 570/4119 cut-off events. For 705962/706443 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 37823 event pairs, 4 based on Foata normal form. 85/3762 useless extension candidates. Maximal degree in co-relation 35029. Up to 905 conditions per place. [2022-11-02 20:36:58,777 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 116 selfloop transitions, 501 changer transitions 8/670 dead transitions. [2022-11-02 20:36:58,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 670 transitions, 18379 flow [2022-11-02 20:36:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-02 20:36:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-02 20:36:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2022-11-02 20:36:58,786 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2022-11-02 20:36:58,786 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2022-11-02 20:36:58,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2022-11-02 20:36:58,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:36:58,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2022-11-02 20:36:58,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:58,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:58,801 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:58,802 INFO L175 Difference]: Start difference. First operand has 461 places, 598 transitions, 11506 flow. Second operand 45 states and 2593 transitions. [2022-11-02 20:36:58,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 670 transitions, 18379 flow [2022-11-02 20:37:00,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 670 transitions, 15315 flow, removed 1237 selfloop flow, removed 41 redundant places. [2022-11-02 20:37:00,437 INFO L231 Difference]: Finished difference. Result has 462 places, 620 transitions, 11393 flow [2022-11-02 20:37:00,438 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9658, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=11393, PETRI_PLACES=462, PETRI_TRANSITIONS=620} [2022-11-02 20:37:00,438 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 392 predicate places. [2022-11-02 20:37:00,438 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 620 transitions, 11393 flow [2022-11-02 20:37:00,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.25) internal successors, (2475), 44 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:00,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:37:00,439 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 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] [2022-11-02 20:37:00,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-02 20:37:00,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:37:00,648 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:37:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash 492119380, now seen corresponding path program 11 times [2022-11-02 20:37:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:00,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359156260] [2022-11-02 20:37:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:37:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359156260] [2022-11-02 20:37:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359156260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904495362] [2022-11-02 20:37:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:37:01,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:01,297 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:01,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:37:01,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-02 20:37:01,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:01,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:37:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:37:01,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:37:02,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904495362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:02,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:37:02,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-11-02 20:37:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192163128] [2022-11-02 20:37:02,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:37:02,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:37:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1413, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:37:02,251 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:37:02,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 620 transitions, 11393 flow. Second operand has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:02,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:37:02,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:37:02,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:37:05,539 INFO L130 PetriNetUnfolder]: 597/4328 cut-off events. [2022-11-02 20:37:05,539 INFO L131 PetriNetUnfolder]: For 557848/558293 co-relation queries the response was YES. [2022-11-02 20:37:05,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33183 conditions, 4328 events. 597/4328 cut-off events. For 557848/558293 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 40243 event pairs, 4 based on Foata normal form. 95/3959 useless extension candidates. Maximal degree in co-relation 32989. Up to 927 conditions per place. [2022-11-02 20:37:05,661 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 110 selfloop transitions, 534 changer transitions 14/703 dead transitions. [2022-11-02 20:37:05,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 703 transitions, 18578 flow [2022-11-02 20:37:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-02 20:37:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-02 20:37:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2884 transitions. [2022-11-02 20:37:05,666 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.824 [2022-11-02 20:37:05,667 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2884 transitions. [2022-11-02 20:37:05,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2884 transitions. [2022-11-02 20:37:05,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:37:05,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2884 transitions. [2022-11-02 20:37:05,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.68) internal successors, (2884), 50 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:05,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:05,681 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:05,682 INFO L175 Difference]: Start difference. First operand has 462 places, 620 transitions, 11393 flow. Second operand 50 states and 2884 transitions. [2022-11-02 20:37:05,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 703 transitions, 18578 flow [2022-11-02 20:37:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 703 transitions, 17820 flow, removed 234 selfloop flow, removed 24 redundant places. [2022-11-02 20:37:07,620 INFO L231 Difference]: Finished difference. Result has 495 places, 645 transitions, 13030 flow [2022-11-02 20:37:07,621 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=10739, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=13030, PETRI_PLACES=495, PETRI_TRANSITIONS=645} [2022-11-02 20:37:07,621 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 425 predicate places. [2022-11-02 20:37:07,621 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 645 transitions, 13030 flow [2022-11-02 20:37:07,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:07,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:37:07,623 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 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] [2022-11-02 20:37:07,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:37:07,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:37:07,849 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:37:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1144201156, now seen corresponding path program 12 times [2022-11-02 20:37:07,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:07,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026988617] [2022-11-02 20:37:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:07,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:08,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026988617] [2022-11-02 20:37:08,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026988617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41811009] [2022-11-02 20:37:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:37:08,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:08,594 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:08,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:37:08,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-02 20:37:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:37:08,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:08,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:09,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41811009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:09,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:37:09,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 46 [2022-11-02 20:37:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17349459] [2022-11-02 20:37:09,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:37:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:37:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1628, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:37:09,703 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-02 20:37:09,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 645 transitions, 13030 flow. Second operand has 46 states, 46 states have (on average 56.19565217391305) internal successors, (2585), 46 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:09,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:37:09,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-02 20:37:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:37:13,312 INFO L130 PetriNetUnfolder]: 592/4331 cut-off events. [2022-11-02 20:37:13,312 INFO L131 PetriNetUnfolder]: For 683962/684380 co-relation queries the response was YES. [2022-11-02 20:37:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35792 conditions, 4331 events. 592/4331 cut-off events. For 683962/684380 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 40186 event pairs, 0 based on Foata normal form. 110/3981 useless extension candidates. Maximal degree in co-relation 35590. Up to 919 conditions per place. [2022-11-02 20:37:13,408 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 99 selfloop transitions, 562 changer transitions 19/725 dead transitions. [2022-11-02 20:37:13,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 725 transitions, 21131 flow [2022-11-02 20:37:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 20:37:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-02 20:37:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3057 transitions. [2022-11-02 20:37:13,414 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.823989218328841 [2022-11-02 20:37:13,414 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3057 transitions. [2022-11-02 20:37:13,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3057 transitions. [2022-11-02 20:37:13,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:37:13,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3057 transitions. [2022-11-02 20:37:13,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.679245283018865) internal successors, (3057), 53 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:13,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 70.0) internal successors, (3780), 54 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:13,427 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 70.0) internal successors, (3780), 54 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:13,428 INFO L175 Difference]: Start difference. First operand has 495 places, 645 transitions, 13030 flow. Second operand 53 states and 3057 transitions. [2022-11-02 20:37:13,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 725 transitions, 21131 flow [2022-11-02 20:37:15,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 725 transitions, 19130 flow, removed 571 selfloop flow, removed 41 redundant places. [2022-11-02 20:37:15,277 INFO L231 Difference]: Finished difference. Result has 512 places, 652 transitions, 13288 flow [2022-11-02 20:37:15,278 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13288, PETRI_PLACES=512, PETRI_TRANSITIONS=652} [2022-11-02 20:37:15,279 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 442 predicate places. [2022-11-02 20:37:15,279 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 652 transitions, 13288 flow [2022-11-02 20:37:15,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 56.19565217391305) internal successors, (2585), 46 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:15,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:37:15,280 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 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] [2022-11-02 20:37:15,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:15,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:15,493 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:37:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:15,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1288075600, now seen corresponding path program 13 times [2022-11-02 20:37:15,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:15,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222894210] [2022-11-02 20:37:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:15,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:37:15,529 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:37:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:37:15,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:37:15,625 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:37:15,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-11-02 20:37:15,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-11-02 20:37:15,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-11-02 20:37:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:37:15,630 INFO L444 BasicCegarLoop]: Path program histogram: [13, 2, 2, 1, 1, 1] [2022-11-02 20:37:15,638 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-02 20:37:15,638 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:37:15,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:37:15 BasicIcfg [2022-11-02 20:37:15,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:37:15,797 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:37:15,797 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:37:15,797 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:37:15,798 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:05" (3/4) ... [2022-11-02 20:37:15,800 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-02 20:37:15,910 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 20:37:15,911 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:37:15,911 INFO L158 Benchmark]: Toolchain (without parser) took 71872.76ms. Allocated memory was 111.1MB in the beginning and 6.8GB in the end (delta: 6.6GB). Free memory was 70.0MB in the beginning and 5.8GB in the end (delta: -5.7GB). Peak memory consumption was 927.3MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,912 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 111.1MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:37:15,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 630.21ms. Allocated memory is still 111.1MB. Free memory was 69.8MB in the beginning and 74.6MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,913 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.78ms. Allocated memory is still 111.1MB. Free memory was 74.6MB in the beginning and 72.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,913 INFO L158 Benchmark]: Boogie Preprocessor took 45.86ms. Allocated memory is still 111.1MB. Free memory was 72.5MB in the beginning and 70.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,914 INFO L158 Benchmark]: RCFGBuilder took 672.99ms. Allocated memory is still 111.1MB. Free memory was 70.8MB in the beginning and 58.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,914 INFO L158 Benchmark]: TraceAbstraction took 70323.48ms. Allocated memory was 111.1MB in the beginning and 6.8GB in the end (delta: 6.6GB). Free memory was 57.8MB in the beginning and 5.8GB in the end (delta: -5.8GB). Peak memory consumption was 894.0MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,914 INFO L158 Benchmark]: Witness Printer took 114.20ms. Allocated memory is still 6.8GB. Free memory was 5.8GB in the beginning and 5.8GB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-02 20:37:15,917 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 111.1MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 630.21ms. Allocated memory is still 111.1MB. Free memory was 69.8MB in the beginning and 74.6MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.78ms. Allocated memory is still 111.1MB. Free memory was 74.6MB in the beginning and 72.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.86ms. Allocated memory is still 111.1MB. Free memory was 72.5MB in the beginning and 70.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 672.99ms. Allocated memory is still 111.1MB. Free memory was 70.8MB in the beginning and 58.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 70323.48ms. Allocated memory was 111.1MB in the beginning and 6.8GB in the end (delta: 6.6GB). Free memory was 57.8MB in the beginning and 5.8GB in the end (delta: -5.8GB). Peak memory consumption was 894.0MB. Max. memory is 16.1GB. * Witness Printer took 114.20ms. Allocated memory is still 6.8GB. Free memory was 5.8GB in the beginning and 5.8GB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=13, id1={5:0}, id2={3:0}, j=14, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=4, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 70.0s, OverallIterations: 20, TraceHistogramMax: 10, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 43.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1309 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1309 mSDsluCounter, 350 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 527 mSDsCounter, 2239 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3479 IncrementalHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2239 mSolverCounterUnsat, 87 mSDtfsCounter, 3479 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3394 GetRequests, 2432 SyntacticMatches, 7 SemanticMatches, 955 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20794 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13288occurred in iteration=19, InterpolantAutomatonStates: 638, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 2999 NumberOfCodeBlocks, 2994 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 4135 ConstructedInterpolants, 0 QuantifiedInterpolants, 16734 SizeOfPredicates, 180 NumberOfNonLiveVariables, 2864 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 45 InterpolantComputations, 6 PerfectInterpolantSequences, 138/8331 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-02 20:37:15,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e6b0ef1-3b09-4dab-b30e-d6cd86f2bfa3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE