./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --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_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/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_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/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_cd709ebc-eb97-4692-9473-e4c32008fc0d/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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- 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 20:53:07,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:53:07,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:53:07,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:53:07,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:53:07,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:53:07,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:53:07,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:53:07,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:53:07,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:53:07,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:53:07,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:53:07,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:53:07,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:53:07,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:53:07,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:53:07,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:53:07,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:53:07,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:53:07,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:53:07,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:53:07,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:53:07,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:53:07,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:53:07,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:53:07,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:53:07,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:53:07,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:53:07,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:53:07,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:53:07,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:53:07,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:53:07,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:53:07,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:53:07,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:53:07,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:53:07,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:53:07,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:53:07,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:53:07,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:53:07,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:53:07,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:53:07,644 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:53:07,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:53:07,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:53:07,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:53:07,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:53:07,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:53:07,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:53:07,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:53:07,650 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:53:07,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:53:07,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:53:07,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:53:07,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:53:07,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:53:07,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:53:07,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:53:07,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:53:07,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:53:07,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:53:07,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:53:07,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:53:07,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:53:07,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:53:07,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:53:07,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:07,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:53:07,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:53:07,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:53:07,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:53:07,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:53:07,658 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:53:07,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:53:07,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:53:07,660 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_cd709ebc-eb97-4692-9473-e4c32008fc0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-02 20:53:08,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:53:08,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:53:08,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:53:08,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:53:08,096 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:53:08,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-02 20:53:08,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/data/2401f32e6/01aeceab501d4e069a717271f0bf4c5b/FLAGa6713c4c0 [2022-11-02 20:53:08,828 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:53:08,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-02 20:53:08,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/data/2401f32e6/01aeceab501d4e069a717271f0bf4c5b/FLAGa6713c4c0 [2022-11-02 20:53:09,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/data/2401f32e6/01aeceab501d4e069a717271f0bf4c5b [2022-11-02 20:53:09,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:53:09,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:53:09,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:09,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:53:09,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:53:09,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ad43f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09, skipping insertion in model container [2022-11-02 20:53:09,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:53:09,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:53:09,485 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_cd709ebc-eb97-4692-9473-e4c32008fc0d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-02 20:53:09,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:09,506 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:53:09,547 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_cd709ebc-eb97-4692-9473-e4c32008fc0d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-02 20:53:09,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:53:09,574 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:53:09,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09 WrapperNode [2022-11-02 20:53:09,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:53:09,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:09,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:53:09,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:53:09,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,628 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-02 20:53:09,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:53:09,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:53:09,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:53:09,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:53:09,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:53:09,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:53:09,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:53:09,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:53:09,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (1/1) ... [2022-11-02 20:53:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:53:09,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:09,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:53:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:53:09,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:53:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:53:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:53:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:53:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:53:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:53:09,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:53:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:53:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:53:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:53:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:53:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:53:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:53:09,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:53:09,791 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 20:53:09,931 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:53:09,934 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:53:10,241 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:53:10,306 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:53:10,322 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:53:10,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:10 BoogieIcfgContainer [2022-11-02 20:53:10,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:53:10,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:53:10,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:53:10,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:53:10,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:53:09" (1/3) ... [2022-11-02 20:53:10,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da9e6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:10, skipping insertion in model container [2022-11-02 20:53:10,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:53:09" (2/3) ... [2022-11-02 20:53:10,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da9e6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:53:10, skipping insertion in model container [2022-11-02 20:53:10,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:53:10" (3/3) ... [2022-11-02 20:53:10,338 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-02 20:53:10,347 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:53:10,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:53:10,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:53:10,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:53:10,453 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:53:10,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-11-02 20:53:10,593 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2022-11-02 20:53:10,593 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:53:10,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-11-02 20:53:10,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-11-02 20:53:10,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-11-02 20:53:10,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:53:10,648 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;@498e85d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:53:10,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:53:10,694 INFO L130 PetriNetUnfolder]: 5/65 cut-off events. [2022-11-02 20:53:10,694 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:53:10,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:10,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:10,696 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 20:53:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1505855464, now seen corresponding path program 1 times [2022-11-02 20:53:10,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122197011] [2022-11-02 20:53:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:11,095 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 20:53:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:11,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122197011] [2022-11-02 20:53:11,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122197011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:11,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:11,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:53:11,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162418651] [2022-11-02 20:53:11,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:53:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:53:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:53:11,189 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 77 [2022-11-02 20:53:11,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:11,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 77 [2022-11-02 20:53:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:11,288 INFO L130 PetriNetUnfolder]: 11/96 cut-off events. [2022-11-02 20:53:11,288 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-02 20:53:11,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 96 events. 11/96 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 156 event pairs, 3 based on Foata normal form. 10/98 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-11-02 20:53:11,294 INFO L137 encePairwiseOnDemand]: 74/77 looper letters, 6 selfloop transitions, 0 changer transitions 1/63 dead transitions. [2022-11-02 20:53:11,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 150 flow [2022-11-02 20:53:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:53:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:53:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2022-11-02 20:53:11,315 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2022-11-02 20:53:11,316 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2022-11-02 20:53:11,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2022-11-02 20:53:11,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:11,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2022-11-02 20:53:11,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,340 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,342 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 2 states and 143 transitions. [2022-11-02 20:53:11,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 150 flow [2022-11-02 20:53:11,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:53:11,363 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 128 flow [2022-11-02 20:53:11,366 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-11-02 20:53:11,371 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2022-11-02 20:53:11,371 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 128 flow [2022-11-02 20:53:11,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:11,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:11,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:53:11,374 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 20:53:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 349637423, now seen corresponding path program 1 times [2022-11-02 20:53:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:11,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170489499] [2022-11-02 20:53:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:11,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:11,730 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 20:53:11,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170489499] [2022-11-02 20:53:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170489499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:11,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:11,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121110144] [2022-11-02 20:53:11,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:11,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:11,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:11,736 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-11-02 20:53:11,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:11,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-11-02 20:53:11,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:11,871 INFO L130 PetriNetUnfolder]: 8/99 cut-off events. [2022-11-02 20:53:11,871 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-02 20:53:11,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 99 events. 8/99 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 169 event pairs, 1 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 127. Up to 18 conditions per place. [2022-11-02 20:53:11,874 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 11 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2022-11-02 20:53:11,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 181 flow [2022-11-02 20:53:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:53:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 20:53:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2022-11-02 20:53:11,885 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2022-11-02 20:53:11,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2022-11-02 20:53:11,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2022-11-02 20:53:11,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:11,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2022-11-02 20:53:11,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,895 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 128 flow. Second operand 5 states and 325 transitions. [2022-11-02 20:53:11,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 181 flow [2022-11-02 20:53:11,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:53:11,898 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 146 flow [2022-11-02 20:53:11,898 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2022-11-02 20:53:11,899 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-11-02 20:53:11,900 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 146 flow [2022-11-02 20:53:11,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:11,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:11,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:11,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:53:11,902 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 20:53:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash 24264525, now seen corresponding path program 1 times [2022-11-02 20:53:11,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913345620] [2022-11-02 20:53:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:11,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:12,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913345620] [2022-11-02 20:53:12,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913345620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023315956] [2022-11-02 20:53:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:12,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:12,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:12,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:53:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:53:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:12,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:12,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023315956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:12,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:12,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-02 20:53:12,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132746342] [2022-11-02 20:53:12,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:12,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:53:12,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:53:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:53:12,489 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-02 20:53:12,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:12,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:12,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-02 20:53:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:12,833 INFO L130 PetriNetUnfolder]: 110/320 cut-off events. [2022-11-02 20:53:12,834 INFO L131 PetriNetUnfolder]: For 27/35 co-relation queries the response was YES. [2022-11-02 20:53:12,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 320 events. 110/320 cut-off events. For 27/35 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1420 event pairs, 11 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 611. Up to 41 conditions per place. [2022-11-02 20:53:12,837 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 52 selfloop transitions, 24 changer transitions 5/125 dead transitions. [2022-11-02 20:53:12,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 461 flow [2022-11-02 20:53:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:53:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:53:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-11-02 20:53:12,845 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-11-02 20:53:12,846 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-11-02 20:53:12,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-11-02 20:53:12,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:12,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-11-02 20:53:12,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:12,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:12,853 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:12,853 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 146 flow. Second operand 14 states and 854 transitions. [2022-11-02 20:53:12,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 461 flow [2022-11-02 20:53:12,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:12,860 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 288 flow [2022-11-02 20:53:12,860 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=288, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-11-02 20:53:12,863 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2022-11-02 20:53:12,863 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 288 flow [2022-11-02 20:53:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:12,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:53:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:13,081 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 20:53:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash -465536495, now seen corresponding path program 2 times [2022-11-02 20:53:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:13,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628861508] [2022-11-02 20:53:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:13,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628861508] [2022-11-02 20:53:13,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628861508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:13,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:13,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570081385] [2022-11-02 20:53:13,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:13,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:13,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:13,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:13,216 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-02 20:53:13,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:13,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:13,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-02 20:53:13,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:13,344 INFO L130 PetriNetUnfolder]: 116/321 cut-off events. [2022-11-02 20:53:13,344 INFO L131 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-11-02 20:53:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 321 events. 116/321 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1399 event pairs, 48 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 869. Up to 162 conditions per place. [2022-11-02 20:53:13,349 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 50 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2022-11-02 20:53:13,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 504 flow [2022-11-02 20:53:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:53:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 20:53:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-11-02 20:53:13,351 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-11-02 20:53:13,351 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-11-02 20:53:13,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-11-02 20:53:13,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:13,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-11-02 20:53:13,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:13,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:13,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:13,355 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 288 flow. Second operand 5 states and 317 transitions. [2022-11-02 20:53:13,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 504 flow [2022-11-02 20:53:13,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 107 transitions, 502 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-02 20:53:13,363 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 357 flow [2022-11-02 20:53:13,364 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2022-11-02 20:53:13,365 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 24 predicate places. [2022-11-02 20:53:13,365 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 357 flow [2022-11-02 20:53:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:13,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:13,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:13,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:53:13,366 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 20:53:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 88617565, now seen corresponding path program 3 times [2022-11-02 20:53:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:13,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082212608] [2022-11-02 20:53:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:13,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082212608] [2022-11-02 20:53:13,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082212608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271041337] [2022-11-02 20:53:13,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:53:13,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:13,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:13,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:53:13,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:53:13,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:53:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:13,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:13,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271041337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:13,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:13,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 20:53:13,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721849144] [2022-11-02 20:53:13,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:13,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:53:13,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:13,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:53:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:53:13,810 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-02 20:53:13,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:13,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:13,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-02 20:53:13,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:14,147 INFO L130 PetriNetUnfolder]: 166/507 cut-off events. [2022-11-02 20:53:14,147 INFO L131 PetriNetUnfolder]: For 671/673 co-relation queries the response was YES. [2022-11-02 20:53:14,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 507 events. 166/507 cut-off events. For 671/673 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2605 event pairs, 36 based on Foata normal form. 9/509 useless extension candidates. Maximal degree in co-relation 1363. Up to 114 conditions per place. [2022-11-02 20:53:14,155 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-11-02 20:53:14,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 839 flow [2022-11-02 20:53:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:53:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:53:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-11-02 20:53:14,158 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-11-02 20:53:14,159 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-11-02 20:53:14,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-11-02 20:53:14,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:14,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-11-02 20:53:14,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:14,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 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 20:53:14,165 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 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 20:53:14,166 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 357 flow. Second operand 9 states and 564 transitions. [2022-11-02 20:53:14,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 839 flow [2022-11-02 20:53:14,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 823 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 20:53:14,182 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 598 flow [2022-11-02 20:53:14,182 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2022-11-02 20:53:14,185 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-11-02 20:53:14,185 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 598 flow [2022-11-02 20:53:14,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:14,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:14,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:14,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:14,387 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 20:53:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1808089009, now seen corresponding path program 4 times [2022-11-02 20:53:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369394667] [2022-11-02 20:53:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369394667] [2022-11-02 20:53:14,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369394667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:14,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927194461] [2022-11-02 20:53:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:53:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:14,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:14,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:53:14,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:53:14,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:14,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:53:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:14,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:14,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927194461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:14,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:14,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 20:53:14,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680097350] [2022-11-02 20:53:14,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:14,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:53:14,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:53:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:53:14,840 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-02 20:53:14,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 598 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:14,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:14,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-02 20:53:14,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:15,222 INFO L130 PetriNetUnfolder]: 201/614 cut-off events. [2022-11-02 20:53:15,223 INFO L131 PetriNetUnfolder]: For 1320/1324 co-relation queries the response was YES. [2022-11-02 20:53:15,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 614 events. 201/614 cut-off events. For 1320/1324 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3488 event pairs, 21 based on Foata normal form. 11/619 useless extension candidates. Maximal degree in co-relation 1829. Up to 106 conditions per place. [2022-11-02 20:53:15,230 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 63 selfloop transitions, 52 changer transitions 1/160 dead transitions. [2022-11-02 20:53:15,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1069 flow [2022-11-02 20:53:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:53:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:53:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-11-02 20:53:15,234 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-11-02 20:53:15,234 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-11-02 20:53:15,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-11-02 20:53:15,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:15,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-11-02 20:53:15,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,240 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,240 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 598 flow. Second operand 12 states and 743 transitions. [2022-11-02 20:53:15,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1069 flow [2022-11-02 20:53:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 1063 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-02 20:53:15,252 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 800 flow [2022-11-02 20:53:15,253 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2022-11-02 20:53:15,253 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-11-02 20:53:15,254 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 800 flow [2022-11-02 20:53:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:15,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:15,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:53:15,479 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 20:53:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:15,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1386634823, now seen corresponding path program 5 times [2022-11-02 20:53:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:15,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908566937] [2022-11-02 20:53:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:15,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:15,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908566937] [2022-11-02 20:53:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908566937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:15,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:15,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:15,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010087435] [2022-11-02 20:53:15,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:15,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:15,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:15,606 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-02 20:53:15,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 800 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:15,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-02 20:53:15,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:15,822 INFO L130 PetriNetUnfolder]: 200/606 cut-off events. [2022-11-02 20:53:15,822 INFO L131 PetriNetUnfolder]: For 1751/1755 co-relation queries the response was YES. [2022-11-02 20:53:15,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 606 events. 200/606 cut-off events. For 1751/1755 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3435 event pairs, 92 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 1993. Up to 248 conditions per place. [2022-11-02 20:53:15,831 INFO L137 encePairwiseOnDemand]: 70/77 looper letters, 75 selfloop transitions, 22 changer transitions 1/142 dead transitions. [2022-11-02 20:53:15,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1121 flow [2022-11-02 20:53:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:53:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:53:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-11-02 20:53:15,834 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-11-02 20:53:15,834 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 369 transitions. [2022-11-02 20:53:15,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 369 transitions. [2022-11-02 20:53:15,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:15,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 369 transitions. [2022-11-02 20:53:15,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.5) internal successors, (369), 6 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,839 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,839 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 800 flow. Second operand 6 states and 369 transitions. [2022-11-02 20:53:15,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1121 flow [2022-11-02 20:53:15,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 142 transitions, 1094 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:15,853 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 866 flow [2022-11-02 20:53:15,853 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-11-02 20:53:15,854 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-11-02 20:53:15,854 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 866 flow [2022-11-02 20:53:15,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:15,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:53:15,856 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 20:53:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash -172972305, now seen corresponding path program 6 times [2022-11-02 20:53:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:15,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813074630] [2022-11-02 20:53:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:15,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:15,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813074630] [2022-11-02 20:53:15,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813074630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:15,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:53:15,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:53:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169695949] [2022-11-02 20:53:15,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:53:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:53:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:53:15,949 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-11-02 20:53:15,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:15,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:15,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-11-02 20:53:15,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:16,199 INFO L130 PetriNetUnfolder]: 199/571 cut-off events. [2022-11-02 20:53:16,200 INFO L131 PetriNetUnfolder]: For 1971/1975 co-relation queries the response was YES. [2022-11-02 20:53:16,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 571 events. 199/571 cut-off events. For 1971/1975 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3138 event pairs, 90 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 2007. Up to 231 conditions per place. [2022-11-02 20:53:16,208 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-11-02 20:53:16,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1127 flow [2022-11-02 20:53:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:53:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 20:53:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-11-02 20:53:16,210 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-11-02 20:53:16,210 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-11-02 20:53:16,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-11-02 20:53:16,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:16,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-11-02 20:53:16,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:16,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:16,213 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:16,213 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 866 flow. Second operand 5 states and 315 transitions. [2022-11-02 20:53:16,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1127 flow [2022-11-02 20:53:16,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1092 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:16,238 INFO L231 Difference]: Finished difference. Result has 123 places, 122 transitions, 855 flow [2022-11-02 20:53:16,238 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2022-11-02 20:53:16,241 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2022-11-02 20:53:16,241 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 855 flow [2022-11-02 20:53:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:16,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:16,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:16,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:53:16,242 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 20:53:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1441489239, now seen corresponding path program 1 times [2022-11-02 20:53:16,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:16,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852132703] [2022-11-02 20:53:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852132703] [2022-11-02 20:53:16,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852132703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:16,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435514448] [2022-11-02 20:53:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:16,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:16,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:16,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:16,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:53:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:53:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:16,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:53:16,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435514448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:16,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:16,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-02 20:53:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202815304] [2022-11-02 20:53:16,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:16,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:53:16,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:53:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:53:16,845 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-11-02 20:53:16,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:16,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:16,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-11-02 20:53:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:17,052 INFO L130 PetriNetUnfolder]: 114/635 cut-off events. [2022-11-02 20:53:17,053 INFO L131 PetriNetUnfolder]: For 1208/1242 co-relation queries the response was YES. [2022-11-02 20:53:17,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757 conditions, 635 events. 114/635 cut-off events. For 1208/1242 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4277 event pairs, 16 based on Foata normal form. 17/640 useless extension candidates. Maximal degree in co-relation 1730. Up to 81 conditions per place. [2022-11-02 20:53:17,061 INFO L137 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-11-02 20:53:17,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 945 flow [2022-11-02 20:53:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:53:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:53:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-11-02 20:53:17,064 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-11-02 20:53:17,064 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-11-02 20:53:17,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-11-02 20:53:17,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:17,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-11-02 20:53:17,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 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 20:53:17,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,068 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,068 INFO L175 Difference]: Start difference. First operand has 123 places, 122 transitions, 855 flow. Second operand 6 states and 395 transitions. [2022-11-02 20:53:17,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 945 flow [2022-11-02 20:53:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 837 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-11-02 20:53:17,080 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 779 flow [2022-11-02 20:53:17,081 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2022-11-02 20:53:17,082 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 51 predicate places. [2022-11-02 20:53:17,082 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 779 flow [2022-11-02 20:53:17,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:17,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:17,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:17,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:53:17,301 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 20:53:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 617201733, now seen corresponding path program 2 times [2022-11-02 20:53:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:17,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962720182] [2022-11-02 20:53:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:17,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:17,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962720182] [2022-11-02 20:53:17,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962720182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:17,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044126417] [2022-11-02 20:53:17,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:53:17,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:17,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:17,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:17,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:53:17,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:53:17,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:17,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:17,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:17,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044126417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:17,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:17,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-02 20:53:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748098407] [2022-11-02 20:53:17,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:53:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:53:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:53:17,872 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:17,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 779 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:17,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:17,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:17,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:20,016 INFO L130 PetriNetUnfolder]: 1030/3004 cut-off events. [2022-11-02 20:53:20,016 INFO L131 PetriNetUnfolder]: For 6048/6048 co-relation queries the response was YES. [2022-11-02 20:53:20,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9791 conditions, 3004 events. 1030/3004 cut-off events. For 6048/6048 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 25446 event pairs, 179 based on Foata normal form. 9/2993 useless extension candidates. Maximal degree in co-relation 9767. Up to 519 conditions per place. [2022-11-02 20:53:20,054 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 182 selfloop transitions, 155 changer transitions 10/389 dead transitions. [2022-11-02 20:53:20,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 389 transitions, 3207 flow [2022-11-02 20:53:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:53:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-02 20:53:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3002 transitions. [2022-11-02 20:53:20,066 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7497502497502497 [2022-11-02 20:53:20,066 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3002 transitions. [2022-11-02 20:53:20,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3002 transitions. [2022-11-02 20:53:20,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:20,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3002 transitions. [2022-11-02 20:53:20,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.73076923076923) internal successors, (3002), 52 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:20,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:20,093 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:20,094 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 779 flow. Second operand 52 states and 3002 transitions. [2022-11-02 20:53:20,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 389 transitions, 3207 flow [2022-11-02 20:53:20,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 389 transitions, 3147 flow, removed 30 selfloop flow, removed 2 redundant places. [2022-11-02 20:53:20,169 INFO L231 Difference]: Finished difference. Result has 185 places, 264 transitions, 2269 flow [2022-11-02 20:53:20,170 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2269, PETRI_PLACES=185, PETRI_TRANSITIONS=264} [2022-11-02 20:53:20,170 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2022-11-02 20:53:20,171 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 264 transitions, 2269 flow [2022-11-02 20:53:20,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:20,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:20,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:20,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:53:20,372 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 20:53:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1607592005, now seen corresponding path program 3 times [2022-11-02 20:53:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:20,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457691928] [2022-11-02 20:53:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:20,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:20,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457691928] [2022-11-02 20:53:20,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457691928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494135828] [2022-11-02 20:53:20,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:53:20,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:20,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:20,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:53:20,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:53:20,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:20,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:20,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:20,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494135828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:20,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:20,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-02 20:53:20,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435011251] [2022-11-02 20:53:20,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:20,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:53:20,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:53:20,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:53:20,888 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:20,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 264 transitions, 2269 flow. Second operand has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:20,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:20,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:20,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:22,691 INFO L130 PetriNetUnfolder]: 1196/3469 cut-off events. [2022-11-02 20:53:22,692 INFO L131 PetriNetUnfolder]: For 18513/18513 co-relation queries the response was YES. [2022-11-02 20:53:22,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15295 conditions, 3469 events. 1196/3469 cut-off events. For 18513/18513 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 30172 event pairs, 192 based on Foata normal form. 15/3473 useless extension candidates. Maximal degree in co-relation 15253. Up to 746 conditions per place. [2022-11-02 20:53:22,806 INFO L137 encePairwiseOnDemand]: 66/77 looper letters, 183 selfloop transitions, 207 changer transitions 44/476 dead transitions. [2022-11-02 20:53:22,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 476 transitions, 5114 flow [2022-11-02 20:53:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:53:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-02 20:53:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-11-02 20:53:22,812 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-11-02 20:53:22,812 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-11-02 20:53:22,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-11-02 20:53:22,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:22,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-11-02 20:53:22,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:22,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:22,829 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:22,829 INFO L175 Difference]: Start difference. First operand has 185 places, 264 transitions, 2269 flow. Second operand 23 states and 1355 transitions. [2022-11-02 20:53:22,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 476 transitions, 5114 flow [2022-11-02 20:53:22,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 476 transitions, 4595 flow, removed 233 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:22,955 INFO L231 Difference]: Finished difference. Result has 211 places, 348 transitions, 3275 flow [2022-11-02 20:53:22,956 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3275, PETRI_PLACES=211, PETRI_TRANSITIONS=348} [2022-11-02 20:53:22,956 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 143 predicate places. [2022-11-02 20:53:22,956 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 348 transitions, 3275 flow [2022-11-02 20:53:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:22,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:22,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:23,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:23,171 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 20:53:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -784504151, now seen corresponding path program 4 times [2022-11-02 20:53:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:23,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140409010] [2022-11-02 20:53:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:23,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:23,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140409010] [2022-11-02 20:53:23,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140409010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:23,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457325186] [2022-11-02 20:53:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:53:23,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:23,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:23,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:53:23,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:53:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:23,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457325186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:23,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:23,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 20:53:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420581549] [2022-11-02 20:53:23,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:23,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:53:23,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:23,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:53:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:53:23,806 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:23,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 348 transitions, 3275 flow. Second operand has 18 states, 18 states have (on average 56.05555555555556) internal successors, (1009), 18 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:23,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:23,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:23,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:26,160 INFO L130 PetriNetUnfolder]: 1433/4080 cut-off events. [2022-11-02 20:53:26,160 INFO L131 PetriNetUnfolder]: For 32125/32125 co-relation queries the response was YES. [2022-11-02 20:53:26,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19799 conditions, 4080 events. 1433/4080 cut-off events. For 32125/32125 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 36505 event pairs, 142 based on Foata normal form. 19/4081 useless extension candidates. Maximal degree in co-relation 19749. Up to 752 conditions per place. [2022-11-02 20:53:26,237 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 200 selfloop transitions, 292 changer transitions 2/536 dead transitions. [2022-11-02 20:53:26,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 536 transitions, 6182 flow [2022-11-02 20:53:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:53:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-02 20:53:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-11-02 20:53:26,339 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-11-02 20:53:26,339 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-11-02 20:53:26,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-11-02 20:53:26,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:26,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-11-02 20:53:26,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:26,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:26,363 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:26,363 INFO L175 Difference]: Start difference. First operand has 211 places, 348 transitions, 3275 flow. Second operand 30 states and 1753 transitions. [2022-11-02 20:53:26,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 536 transitions, 6182 flow [2022-11-02 20:53:26,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 536 transitions, 6015 flow, removed 81 selfloop flow, removed 2 redundant places. [2022-11-02 20:53:26,575 INFO L231 Difference]: Finished difference. Result has 252 places, 435 transitions, 5206 flow [2022-11-02 20:53:26,576 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5206, PETRI_PLACES=252, PETRI_TRANSITIONS=435} [2022-11-02 20:53:26,577 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 184 predicate places. [2022-11-02 20:53:26,577 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 435 transitions, 5206 flow [2022-11-02 20:53:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.05555555555556) internal successors, (1009), 18 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:26,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:26,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:26,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:26,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:53:26,799 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 20:53:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -292908893, now seen corresponding path program 5 times [2022-11-02 20:53:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006440005] [2022-11-02 20:53:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:26,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006440005] [2022-11-02 20:53:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006440005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282128535] [2022-11-02 20:53:26,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:53:26,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:26,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:26,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:27,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:53:27,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:53:27,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:27,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:27,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:27,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282128535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:27,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:27,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-02 20:53:27,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601853246] [2022-11-02 20:53:27,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:27,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:53:27,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:53:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:53:27,420 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:27,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 435 transitions, 5206 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:27,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:27,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:27,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:29,706 INFO L130 PetriNetUnfolder]: 1456/4188 cut-off events. [2022-11-02 20:53:29,706 INFO L131 PetriNetUnfolder]: For 49568/49568 co-relation queries the response was YES. [2022-11-02 20:53:29,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23057 conditions, 4188 events. 1456/4188 cut-off events. For 49568/49568 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 37868 event pairs, 322 based on Foata normal form. 1/4159 useless extension candidates. Maximal degree in co-relation 22993. Up to 1167 conditions per place. [2022-11-02 20:53:29,791 INFO L137 encePairwiseOnDemand]: 66/77 looper letters, 298 selfloop transitions, 171 changer transitions 7/518 dead transitions. [2022-11-02 20:53:29,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 518 transitions, 7165 flow [2022-11-02 20:53:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:53:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-02 20:53:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-11-02 20:53:29,797 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-11-02 20:53:29,797 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-11-02 20:53:29,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-11-02 20:53:29,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:29,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-11-02 20:53:29,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,809 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:29,809 INFO L175 Difference]: Start difference. First operand has 252 places, 435 transitions, 5206 flow. Second operand 24 states and 1386 transitions. [2022-11-02 20:53:29,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 518 transitions, 7165 flow [2022-11-02 20:53:30,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 518 transitions, 6774 flow, removed 86 selfloop flow, removed 9 redundant places. [2022-11-02 20:53:30,322 INFO L231 Difference]: Finished difference. Result has 278 places, 463 transitions, 5665 flow [2022-11-02 20:53:30,323 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5665, PETRI_PLACES=278, PETRI_TRANSITIONS=463} [2022-11-02 20:53:30,324 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 210 predicate places. [2022-11-02 20:53:30,324 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 463 transitions, 5665 flow [2022-11-02 20:53:30,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:30,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:30,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:30,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:53:30,551 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 20:53:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1245845967, now seen corresponding path program 6 times [2022-11-02 20:53:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:30,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385283479] [2022-11-02 20:53:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:30,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385283479] [2022-11-02 20:53:30,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385283479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611353071] [2022-11-02 20:53:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:53:30,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:30,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:30,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:53:30,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 20:53:30,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:31,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:31,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611353071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:31,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:31,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-02 20:53:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289268983] [2022-11-02 20:53:31,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:53:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:53:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:53:31,154 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:31,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 463 transitions, 5665 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:31,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:31,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:31,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:32,918 INFO L130 PetriNetUnfolder]: 1485/4362 cut-off events. [2022-11-02 20:53:32,918 INFO L131 PetriNetUnfolder]: For 59902/59902 co-relation queries the response was YES. [2022-11-02 20:53:32,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24798 conditions, 4362 events. 1485/4362 cut-off events. For 59902/59902 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40234 event pairs, 345 based on Foata normal form. 1/4343 useless extension candidates. Maximal degree in co-relation 24723. Up to 2032 conditions per place. [2022-11-02 20:53:33,078 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 360 selfloop transitions, 116 changer transitions 8/526 dead transitions. [2022-11-02 20:53:33,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 526 transitions, 7389 flow [2022-11-02 20:53:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:53:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-02 20:53:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-11-02 20:53:33,081 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-11-02 20:53:33,082 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-11-02 20:53:33,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-11-02 20:53:33,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:33,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-11-02 20:53:33,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:33,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:33,092 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:33,092 INFO L175 Difference]: Start difference. First operand has 278 places, 463 transitions, 5665 flow. Second operand 16 states and 924 transitions. [2022-11-02 20:53:33,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 526 transitions, 7389 flow [2022-11-02 20:53:33,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 526 transitions, 7240 flow, removed 67 selfloop flow, removed 3 redundant places. [2022-11-02 20:53:33,414 INFO L231 Difference]: Finished difference. Result has 295 places, 487 transitions, 6257 flow [2022-11-02 20:53:33,415 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=5521, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6257, PETRI_PLACES=295, PETRI_TRANSITIONS=487} [2022-11-02 20:53:33,416 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 227 predicate places. [2022-11-02 20:53:33,416 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 487 transitions, 6257 flow [2022-11-02 20:53:33,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:33,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:33,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:33,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:53:33,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:53:33,617 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 20:53:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1403444137, now seen corresponding path program 7 times [2022-11-02 20:53:33,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:33,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698420401] [2022-11-02 20:53:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:33,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698420401] [2022-11-02 20:53:33,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698420401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462025000] [2022-11-02 20:53:33,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:53:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:33,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:33,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:53:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:33,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:34,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:34,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462025000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:34,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:34,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-02 20:53:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43711911] [2022-11-02 20:53:34,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:34,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:53:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:53:34,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:53:34,150 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:34,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 487 transitions, 6257 flow. Second operand has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:34,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:34,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:34,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:37,835 INFO L130 PetriNetUnfolder]: 1937/5606 cut-off events. [2022-11-02 20:53:37,835 INFO L131 PetriNetUnfolder]: For 107377/107377 co-relation queries the response was YES. [2022-11-02 20:53:37,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35374 conditions, 5606 events. 1937/5606 cut-off events. For 107377/107377 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 54902 event pairs, 172 based on Foata normal form. 75/5661 useless extension candidates. Maximal degree in co-relation 35292. Up to 676 conditions per place. [2022-11-02 20:53:37,962 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 309 selfloop transitions, 487 changer transitions 33/871 dead transitions. [2022-11-02 20:53:37,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 871 transitions, 13009 flow [2022-11-02 20:53:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:53:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-02 20:53:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3916 transitions. [2022-11-02 20:53:37,986 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7478991596638656 [2022-11-02 20:53:37,987 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3916 transitions. [2022-11-02 20:53:37,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3916 transitions. [2022-11-02 20:53:37,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:37,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3916 transitions. [2022-11-02 20:53:38,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.588235294117645) internal successors, (3916), 68 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,039 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,040 INFO L175 Difference]: Start difference. First operand has 295 places, 487 transitions, 6257 flow. Second operand 68 states and 3916 transitions. [2022-11-02 20:53:38,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 871 transitions, 13009 flow [2022-11-02 20:53:38,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 871 transitions, 12596 flow, removed 159 selfloop flow, removed 4 redundant places. [2022-11-02 20:53:38,840 INFO L231 Difference]: Finished difference. Result has 370 places, 656 transitions, 10572 flow [2022-11-02 20:53:38,841 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=10572, PETRI_PLACES=370, PETRI_TRANSITIONS=656} [2022-11-02 20:53:38,842 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 302 predicate places. [2022-11-02 20:53:38,842 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 656 transitions, 10572 flow [2022-11-02 20:53:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:38,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:38,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:38,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-02 20:53:39,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:53:39,059 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 20:53:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash -408507869, now seen corresponding path program 8 times [2022-11-02 20:53:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725341982] [2022-11-02 20:53:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:39,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725341982] [2022-11-02 20:53:39,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725341982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470221540] [2022-11-02 20:53:39,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:53:39,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:39,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:39,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:53:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:53:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:39,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:39,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470221540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:39,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:39,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-02 20:53:39,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892922830] [2022-11-02 20:53:39,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:53:39,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:53:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:53:39,588 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:39,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 656 transitions, 10572 flow. Second operand has 17 states, 17 states have (on average 55.588235294117645) internal successors, (945), 17 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:39,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:39,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:39,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:42,920 INFO L130 PetriNetUnfolder]: 1927/5508 cut-off events. [2022-11-02 20:53:42,920 INFO L131 PetriNetUnfolder]: For 134983/134983 co-relation queries the response was YES. [2022-11-02 20:53:42,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38859 conditions, 5508 events. 1927/5508 cut-off events. For 134983/134983 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 53412 event pairs, 201 based on Foata normal form. 2/5472 useless extension candidates. Maximal degree in co-relation 38761. Up to 628 conditions per place. [2022-11-02 20:53:43,144 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 281 selfloop transitions, 459 changer transitions 22/804 dead transitions. [2022-11-02 20:53:43,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 804 transitions, 13799 flow [2022-11-02 20:53:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:53:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 20:53:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2655 transitions. [2022-11-02 20:53:43,157 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7495765104460757 [2022-11-02 20:53:43,157 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2655 transitions. [2022-11-02 20:53:43,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2655 transitions. [2022-11-02 20:53:43,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:43,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2655 transitions. [2022-11-02 20:53:43,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 57.71739130434783) internal successors, (2655), 46 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:43,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:43,171 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 77.0) internal successors, (3619), 47 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:43,172 INFO L175 Difference]: Start difference. First operand has 370 places, 656 transitions, 10572 flow. Second operand 46 states and 2655 transitions. [2022-11-02 20:53:43,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 804 transitions, 13799 flow [2022-11-02 20:53:44,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 804 transitions, 12589 flow, removed 509 selfloop flow, removed 16 redundant places. [2022-11-02 20:53:44,398 INFO L231 Difference]: Finished difference. Result has 403 places, 674 transitions, 10951 flow [2022-11-02 20:53:44,399 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=9622, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=10951, PETRI_PLACES=403, PETRI_TRANSITIONS=674} [2022-11-02 20:53:44,399 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 335 predicate places. [2022-11-02 20:53:44,399 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 674 transitions, 10951 flow [2022-11-02 20:53:44,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.588235294117645) internal successors, (945), 17 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:44,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:44,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:44,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:53:44,601 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 20:53:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -721414865, now seen corresponding path program 9 times [2022-11-02 20:53:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335585549] [2022-11-02 20:53:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:44,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335585549] [2022-11-02 20:53:44,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335585549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692495358] [2022-11-02 20:53:44,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:53:44,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:44,759 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:44,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:53:44,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:53:44,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:45,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:45,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692495358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:45,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:45,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-02 20:53:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725465691] [2022-11-02 20:53:45,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:45,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:53:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:53:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:53:45,250 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:45,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 674 transitions, 10951 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:45,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:45,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:45,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:53:52,054 INFO L130 PetriNetUnfolder]: 3767/10322 cut-off events. [2022-11-02 20:53:52,054 INFO L131 PetriNetUnfolder]: For 205297/205297 co-relation queries the response was YES. [2022-11-02 20:53:52,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70470 conditions, 10322 events. 3767/10322 cut-off events. For 205297/205297 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 110448 event pairs, 493 based on Foata normal form. 59/10301 useless extension candidates. Maximal degree in co-relation 70371. Up to 1661 conditions per place. [2022-11-02 20:53:52,475 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 493 selfloop transitions, 1029 changer transitions 33/1597 dead transitions. [2022-11-02 20:53:52,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1597 transitions, 29458 flow [2022-11-02 20:53:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-02 20:53:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-02 20:53:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-11-02 20:53:52,489 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-11-02 20:53:52,490 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-11-02 20:53:52,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-11-02 20:53:52,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:53:52,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-11-02 20:53:52,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:52,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:52,525 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:52,525 INFO L175 Difference]: Start difference. First operand has 403 places, 674 transitions, 10951 flow. Second operand 86 states and 4916 transitions. [2022-11-02 20:53:52,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1597 transitions, 29458 flow [2022-11-02 20:53:54,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1597 transitions, 27320 flow, removed 198 selfloop flow, removed 26 redundant places. [2022-11-02 20:53:55,001 INFO L231 Difference]: Finished difference. Result has 486 places, 1294 transitions, 24108 flow [2022-11-02 20:53:55,002 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=10080, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=24108, PETRI_PLACES=486, PETRI_TRANSITIONS=1294} [2022-11-02 20:53:55,002 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 418 predicate places. [2022-11-02 20:53:55,003 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1294 transitions, 24108 flow [2022-11-02 20:53:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:55,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:53:55,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:55,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:53:55,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:53:55,207 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 20:53:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 764538425, now seen corresponding path program 10 times [2022-11-02 20:53:55,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:55,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390661370] [2022-11-02 20:53:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:55,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:55,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390661370] [2022-11-02 20:53:55,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390661370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:55,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139512351] [2022-11-02 20:53:55,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:53:55,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:55,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:55,375 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:55,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:53:55,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:53:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:53:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:55,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:53:55,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139512351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:53:55,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:53:55,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-02 20:53:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883413306] [2022-11-02 20:53:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:53:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:53:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:53:55,762 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:53:55,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1294 transitions, 24108 flow. Second operand has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:55,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:53:55,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:53:55,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:07,094 INFO L130 PetriNetUnfolder]: 5337/14890 cut-off events. [2022-11-02 20:54:07,094 INFO L131 PetriNetUnfolder]: For 392668/392668 co-relation queries the response was YES. [2022-11-02 20:54:07,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113265 conditions, 14890 events. 5337/14890 cut-off events. For 392668/392668 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 167538 event pairs, 576 based on Foata normal form. 9/14786 useless extension candidates. Maximal degree in co-relation 113144. Up to 3646 conditions per place. [2022-11-02 20:54:07,475 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1129 selfloop transitions, 825 changer transitions 17/2013 dead transitions. [2022-11-02 20:54:07,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2013 transitions, 40303 flow [2022-11-02 20:54:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-02 20:54:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-02 20:54:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4213 transitions. [2022-11-02 20:54:07,485 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7495107632093934 [2022-11-02 20:54:07,485 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4213 transitions. [2022-11-02 20:54:07,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4213 transitions. [2022-11-02 20:54:07,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:07,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4213 transitions. [2022-11-02 20:54:07,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.71232876712329) internal successors, (4213), 73 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:07,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 77.0) internal successors, (5698), 74 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:07,507 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 77.0) internal successors, (5698), 74 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:07,507 INFO L175 Difference]: Start difference. First operand has 486 places, 1294 transitions, 24108 flow. Second operand 73 states and 4213 transitions. [2022-11-02 20:54:07,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2013 transitions, 40303 flow [2022-11-02 20:54:13,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 2013 transitions, 39376 flow, removed 349 selfloop flow, removed 32 redundant places. [2022-11-02 20:54:13,340 INFO L231 Difference]: Finished difference. Result has 558 places, 1718 transitions, 34829 flow [2022-11-02 20:54:13,341 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=23573, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=34829, PETRI_PLACES=558, PETRI_TRANSITIONS=1718} [2022-11-02 20:54:13,342 INFO L287 CegarLoopForPetriNet]: 68 programPoint places, 490 predicate places. [2022-11-02 20:54:13,342 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1718 transitions, 34829 flow [2022-11-02 20:54:13,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.333333333333336) internal successors, (1162), 21 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:13,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:54:13,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:54:13,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:13,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:13,555 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 20:54:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash 883773797, now seen corresponding path program 11 times [2022-11-02 20:54:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047457828] [2022-11-02 20:54:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:13,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:13,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047457828] [2022-11-02 20:54:13,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047457828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:13,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029239389] [2022-11-02 20:54:13,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:54:13,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:13,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:13,734 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:13,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd709ebc-eb97-4692-9473-e4c32008fc0d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:54:13,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:54:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:54:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:54:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:14,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:14,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029239389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:14,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:14,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-02 20:54:14,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706514905] [2022-11-02 20:54:14,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:54:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:54:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:54:14,147 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-11-02 20:54:14,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1718 transitions, 34829 flow. Second operand has 19 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:14,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:54:14,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-11-02 20:54:14,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:54:31,273 INFO L130 PetriNetUnfolder]: 6719/18463 cut-off events. [2022-11-02 20:54:31,273 INFO L131 PetriNetUnfolder]: For 635505/635505 co-relation queries the response was YES. [2022-11-02 20:54:31,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155889 conditions, 18463 events. 6719/18463 cut-off events. For 635505/635505 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 213880 event pairs, 794 based on Foata normal form. 60/18363 useless extension candidates. Maximal degree in co-relation 155740. Up to 3934 conditions per place. [2022-11-02 20:54:32,085 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 725 selfloop transitions, 1584 changer transitions 25/2376 dead transitions. [2022-11-02 20:54:32,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2376 transitions, 52991 flow [2022-11-02 20:54:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 20:54:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-02 20:54:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3929 transitions. [2022-11-02 20:54:32,094 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7395068699416526 [2022-11-02 20:54:32,094 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3929 transitions. [2022-11-02 20:54:32,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3929 transitions. [2022-11-02 20:54:32,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:54:32,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3929 transitions. [2022-11-02 20:54:32,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.94202898550725) internal successors, (3929), 69 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:32,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:32,120 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:54:32,121 INFO L175 Difference]: Start difference. First operand has 558 places, 1718 transitions, 34829 flow. Second operand 69 states and 3929 transitions. [2022-11-02 20:54:32,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2376 transitions, 52991 flow