./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro --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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- 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-8393723 [2022-11-18 19:32:06,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:32:06,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:32:06,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:32:06,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:32:06,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:32:06,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:32:06,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:32:06,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:32:06,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:32:06,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:32:06,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:32:06,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:32:06,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:32:06,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:32:06,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:32:06,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:32:06,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:32:06,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:32:06,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:32:06,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:32:06,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:32:06,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:32:06,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:32:06,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:32:06,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:32:06,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:32:06,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:32:06,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:32:06,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:32:06,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:32:06,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:32:06,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:32:06,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:32:06,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:32:06,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:32:06,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:32:06,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:32:06,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:32:06,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:32:06,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:32:06,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:32:06,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:32:06,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:32:06,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:32:06,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:32:06,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:32:06,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:32:06,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:32:06,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:32:06,736 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:32:06,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:32:06,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:32:06,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:32:06,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:32:06,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:32:06,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:32:06,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:32:06,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:32:06,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:32:06,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:32:06,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:32:06,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:32:06,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:32:06,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:32:06,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:32:06,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:32:06,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:32:06,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:32:06,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:32:06,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:32:06,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:32:06,744 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:32:06,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:32:06,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:32:06,744 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_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-11-18 19:32:07,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:32:07,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:32:07,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:32:07,127 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:32:07,128 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:32:07,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-18 19:32:07,230 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/data/0f9e6b2a0/cacef1dcb1c24581b53cd22a6cc9762a/FLAG55ef229b6 [2022-11-18 19:32:07,736 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:32:07,737 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-18 19:32:07,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/data/0f9e6b2a0/cacef1dcb1c24581b53cd22a6cc9762a/FLAG55ef229b6 [2022-11-18 19:32:08,086 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/data/0f9e6b2a0/cacef1dcb1c24581b53cd22a6cc9762a [2022-11-18 19:32:08,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:32:08,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:32:08,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:32:08,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:32:08,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:32:08,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d602b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08, skipping insertion in model container [2022-11-18 19:32:08,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:32:08,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:32:08,444 WARN L234 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_23a7a9af-3022-4bee-867b-6576774f5070/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-18 19:32:08,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:08,464 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:32:08,506 WARN L234 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_23a7a9af-3022-4bee-867b-6576774f5070/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-18 19:32:08,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:08,538 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:32:08,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08 WrapperNode [2022-11-18 19:32:08,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:32:08,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:32:08,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:32:08,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:32:08,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,594 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-11-18 19:32:08,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:32:08,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:32:08,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:32:08,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:32:08,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,649 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:32:08,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:32:08,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:32:08,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:32:08,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (1/1) ... [2022-11-18 19:32:08,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:32:08,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:08,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:32:08,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:32:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:32:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:32:08,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:32:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:32:08,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:32:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:32:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:32:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:32:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:32:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:32:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:32:08,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:32:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:32:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:32:08,748 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:32:08,850 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:32:08,852 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:32:09,140 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:32:09,212 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:32:09,212 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:32:09,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:32:09 BoogieIcfgContainer [2022-11-18 19:32:09,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:32:09,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:32:09,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:32:09,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:32:09,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:32:08" (1/3) ... [2022-11-18 19:32:09,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9d4848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:32:09, skipping insertion in model container [2022-11-18 19:32:09,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:08" (2/3) ... [2022-11-18 19:32:09,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9d4848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:32:09, skipping insertion in model container [2022-11-18 19:32:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:32:09" (3/3) ... [2022-11-18 19:32:09,233 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-18 19:32:09,245 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:32:09,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:32:09,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:32:09,259 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:32:09,330 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:32:09,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-18 19:32:09,446 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-18 19:32:09,446 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:32:09,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-18 19:32:09,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-18 19:32:09,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-18 19:32:09,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:32:09,480 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;@7a37a57f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:32:09,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 19:32:09,515 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-18 19:32:09,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:32:09,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:09,517 INFO L209 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] [2022-11-18 19:32:09,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1282531609, now seen corresponding path program 1 times [2022-11-18 19:32:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:09,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225587228] [2022-11-18 19:32:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:09,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:09,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225587228] [2022-11-18 19:32:09,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225587228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:09,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:09,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:32:09,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488098129] [2022-11-18 19:32:09,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:09,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:32:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:32:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:32:09,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-11-18 19:32:09,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:09,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:09,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-11-18 19:32:09,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:09,980 INFO L130 PetriNetUnfolder]: 4/76 cut-off events. [2022-11-18 19:32:09,981 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-18 19:32:09,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-11-18 19:32:09,983 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-18 19:32:09,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-11-18 19:32:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:32:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:32:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-11-18 19:32:10,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-11-18 19:32:10,009 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-11-18 19:32:10,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-11-18 19:32:10,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:10,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-11-18 19:32:10,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:10,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:10,023 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:10,026 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-11-18 19:32:10,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-11-18 19:32:10,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:32:10,034 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-18 19:32:10,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-18 19:32:10,045 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-18 19:32:10,048 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-18 19:32:10,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.0) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:10,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:10,049 INFO L209 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] [2022-11-18 19:32:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:32:10,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-11-18 19:32:10,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:10,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608506068] [2022-11-18 19:32:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:10,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608506068] [2022-11-18 19:32:10,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608506068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:10,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:10,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:32:10,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629453522] [2022-11-18 19:32:10,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:32:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:32:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:10,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-11-18 19:32:10,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:10,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:10,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-11-18 19:32:10,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:11,139 INFO L130 PetriNetUnfolder]: 50/172 cut-off events. [2022-11-18 19:32:11,139 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 19:32:11,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 491 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-11-18 19:32:11,147 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-11-18 19:32:11,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-11-18 19:32:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:32:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-11-18 19:32:11,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-18 19:32:11,160 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-11-18 19:32:11,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-11-18 19:32:11,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:11,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-11-18 19:32:11,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:11,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:11,172 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:11,172 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-11-18 19:32:11,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-11-18 19:32:11,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:32:11,175 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-11-18 19:32:11,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-18 19:32:11,177 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-11-18 19:32:11,177 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-11-18 19:32:11,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:11,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:11,178 INFO L209 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, 1, 1, 1] [2022-11-18 19:32:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:32:11,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-11-18 19:32:11,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283290995] [2022-11-18 19:32:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:11,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283290995] [2022-11-18 19:32:11,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283290995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:11,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323114891] [2022-11-18 19:32:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:11,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:11,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:11,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:11,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:32:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:32:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:12,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323114891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:12,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:12,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-11-18 19:32:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379284745] [2022-11-18 19:32:12,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:12,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:12,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:12,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-11-18 19:32:12,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:12,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:12,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-11-18 19:32:12,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:12,571 INFO L130 PetriNetUnfolder]: 91/351 cut-off events. [2022-11-18 19:32:12,571 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-18 19:32:12,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1530 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-11-18 19:32:12,576 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-11-18 19:32:12,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-11-18 19:32:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:32:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 19:32:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-11-18 19:32:12,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-11-18 19:32:12,580 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-11-18 19:32:12,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-11-18 19:32:12,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:12,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-11-18 19:32:12,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:12,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 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) [2022-11-18 19:32:12,588 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 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) [2022-11-18 19:32:12,588 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-11-18 19:32:12,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-11-18 19:32:12,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 19:32:12,594 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-11-18 19:32:12,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-11-18 19:32:12,595 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-18 19:32:12,595 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-11-18 19:32:12,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:12,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:12,597 INFO L209 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, 1, 1, 1] [2022-11-18 19:32:12,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:12,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:12,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash -628521019, now seen corresponding path program 2 times [2022-11-18 19:32:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:12,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299252871] [2022-11-18 19:32:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299252871] [2022-11-18 19:32:13,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299252871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838091320] [2022-11-18 19:32:13,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:32:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:13,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:13,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:32:13,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:32:13,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:32:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:32:13,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:13,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838091320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:13,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:32:13,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-18 19:32:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760221292] [2022-11-18 19:32:13,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:13,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:32:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:32:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:13,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-11-18 19:32:13,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:13,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:13,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-11-18 19:32:13,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:13,819 INFO L130 PetriNetUnfolder]: 69/267 cut-off events. [2022-11-18 19:32:13,819 INFO L131 PetriNetUnfolder]: For 413/419 co-relation queries the response was YES. [2022-11-18 19:32:13,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 267 events. 69/267 cut-off events. For 413/419 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1032 event pairs, 15 based on Foata normal form. 12/271 useless extension candidates. Maximal degree in co-relation 706. Up to 68 conditions per place. [2022-11-18 19:32:13,824 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-11-18 19:32:13,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-11-18 19:32:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:32:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-11-18 19:32:13,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-11-18 19:32:13,828 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-11-18 19:32:13,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-11-18 19:32:13,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:13,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-11-18 19:32:13,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:13,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:13,833 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:13,833 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-11-18 19:32:13,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-11-18 19:32:13,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:32:13,852 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-11-18 19:32:13,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-11-18 19:32:13,854 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-11-18 19:32:13,855 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-11-18 19:32:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:13,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:13,856 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:13,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:14,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:14,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1426240687, now seen corresponding path program 1 times [2022-11-18 19:32:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665174526] [2022-11-18 19:32:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:14,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:14,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665174526] [2022-11-18 19:32:14,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665174526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848576881] [2022-11-18 19:32:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:14,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:14,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:14,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:14,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:32:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:32:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:14,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:15,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848576881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:15,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:15,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-18 19:32:15,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207370631] [2022-11-18 19:32:15,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:15,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:32:15,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:15,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:32:15,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:32:15,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-11-18 19:32:15,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:15,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:15,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-11-18 19:32:15,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:15,438 INFO L130 PetriNetUnfolder]: 137/430 cut-off events. [2022-11-18 19:32:15,439 INFO L131 PetriNetUnfolder]: For 907/913 co-relation queries the response was YES. [2022-11-18 19:32:15,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 430 events. 137/430 cut-off events. For 907/913 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2064 event pairs, 13 based on Foata normal form. 14/438 useless extension candidates. Maximal degree in co-relation 1312. Up to 103 conditions per place. [2022-11-18 19:32:15,449 INFO L137 encePairwiseOnDemand]: 77/84 looper letters, 50 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2022-11-18 19:32:15,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 142 transitions, 856 flow [2022-11-18 19:32:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:32:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-11-18 19:32:15,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8184523809523809 [2022-11-18 19:32:15,452 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-11-18 19:32:15,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-11-18 19:32:15,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:15,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-11-18 19:32:15,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:15,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:15,458 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:15,458 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 8 states and 550 transitions. [2022-11-18 19:32:15,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 142 transitions, 856 flow [2022-11-18 19:32:15,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 812 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-18 19:32:15,470 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 694 flow [2022-11-18 19:32:15,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2022-11-18 19:32:15,473 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 28 predicate places. [2022-11-18 19:32:15,474 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 694 flow [2022-11-18 19:32:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:15,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:15,475 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:15,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:15,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash -400015733, now seen corresponding path program 2 times [2022-11-18 19:32:15,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:15,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560842747] [2022-11-18 19:32:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:16,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:16,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560842747] [2022-11-18 19:32:16,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560842747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:16,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278133018] [2022-11-18 19:32:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:32:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:16,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:16,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:32:16,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:32:16,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:16,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:16,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:16,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:32:16,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278133018] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:16,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:16,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 7] total 15 [2022-11-18 19:32:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687516087] [2022-11-18 19:32:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:16,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:32:16,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:32:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:32:16,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-11-18 19:32:16,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 694 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) [2022-11-18 19:32:16,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:16,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-11-18 19:32:16,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:17,174 INFO L130 PetriNetUnfolder]: 136/582 cut-off events. [2022-11-18 19:32:17,174 INFO L131 PetriNetUnfolder]: For 1722/1773 co-relation queries the response was YES. [2022-11-18 19:32:17,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 582 events. 136/582 cut-off events. For 1722/1773 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3454 event pairs, 13 based on Foata normal form. 22/595 useless extension candidates. Maximal degree in co-relation 1879. Up to 92 conditions per place. [2022-11-18 19:32:17,182 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 40 selfloop transitions, 18 changer transitions 8/145 dead transitions. [2022-11-18 19:32:17,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1017 flow [2022-11-18 19:32:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:32:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-11-18 19:32:17,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7837301587301587 [2022-11-18 19:32:17,185 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-11-18 19:32:17,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-11-18 19:32:17,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:17,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-11-18 19:32:17,187 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) [2022-11-18 19:32:17,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:17,189 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:17,189 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 694 flow. Second operand 6 states and 395 transitions. [2022-11-18 19:32:17,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1017 flow [2022-11-18 19:32:17,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1011 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 19:32:17,204 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 895 flow [2022-11-18 19:32:17,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=895, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2022-11-18 19:32:17,208 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2022-11-18 19:32:17,208 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 895 flow [2022-11-18 19:32:17,209 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) [2022-11-18 19:32:17,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:17,209 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:17,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:32:17,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1573734619, now seen corresponding path program 3 times [2022-11-18 19:32:17,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159207590] [2022-11-18 19:32:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:17,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:18,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:18,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159207590] [2022-11-18 19:32:18,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159207590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:18,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413178191] [2022-11-18 19:32:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:32:18,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:18,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:18,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:32:18,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:32:18,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:18,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:19,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413178191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:19,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:19,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-11-18 19:32:19,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025169878] [2022-11-18 19:32:19,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:19,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:32:19,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:19,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:32:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:32:19,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:32:19,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 895 flow. Second operand has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:19,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:19,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:32:19,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:22,358 INFO L130 PetriNetUnfolder]: 512/1621 cut-off events. [2022-11-18 19:32:22,358 INFO L131 PetriNetUnfolder]: For 7632/7638 co-relation queries the response was YES. [2022-11-18 19:32:22,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1621 events. 512/1621 cut-off events. For 7632/7638 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11876 event pairs, 6 based on Foata normal form. 34/1652 useless extension candidates. Maximal degree in co-relation 6442. Up to 284 conditions per place. [2022-11-18 19:32:22,380 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 97 selfloop transitions, 225 changer transitions 13/390 dead transitions. [2022-11-18 19:32:22,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 390 transitions, 4034 flow [2022-11-18 19:32:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 19:32:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-18 19:32:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3374 transitions. [2022-11-18 19:32:22,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7875816993464052 [2022-11-18 19:32:22,390 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3374 transitions. [2022-11-18 19:32:22,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3374 transitions. [2022-11-18 19:32:22,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:22,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3374 transitions. [2022-11-18 19:32:22,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 66.15686274509804) internal successors, (3374), 51 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:22,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:22,414 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:22,414 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 895 flow. Second operand 51 states and 3374 transitions. [2022-11-18 19:32:22,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 390 transitions, 4034 flow [2022-11-18 19:32:22,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 390 transitions, 4028 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-18 19:32:22,447 INFO L231 Difference]: Finished difference. Result has 179 places, 314 transitions, 3551 flow [2022-11-18 19:32:22,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3551, PETRI_PLACES=179, PETRI_TRANSITIONS=314} [2022-11-18 19:32:22,449 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 105 predicate places. [2022-11-18 19:32:22,449 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 314 transitions, 3551 flow [2022-11-18 19:32:22,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:22,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:22,451 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:22,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 19:32:22,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:22,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash -669652269, now seen corresponding path program 4 times [2022-11-18 19:32:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:22,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217453635] [2022-11-18 19:32:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:23,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217453635] [2022-11-18 19:32:23,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217453635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:23,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315811777] [2022-11-18 19:32:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:32:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:23,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:23,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:32:23,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:32:23,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:32:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:23,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:23,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315811777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:23,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:23,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-11-18 19:32:23,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072475327] [2022-11-18 19:32:23,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:23,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:32:23,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:23,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:32:23,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:32:23,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 19:32:23,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 314 transitions, 3551 flow. Second operand has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:23,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:23,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 19:32:23,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:26,813 INFO L130 PetriNetUnfolder]: 675/1989 cut-off events. [2022-11-18 19:32:26,814 INFO L131 PetriNetUnfolder]: For 32795/32795 co-relation queries the response was YES. [2022-11-18 19:32:26,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11416 conditions, 1989 events. 675/1989 cut-off events. For 32795/32795 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14881 event pairs, 22 based on Foata normal form. 31/2017 useless extension candidates. Maximal degree in co-relation 11373. Up to 346 conditions per place. [2022-11-18 19:32:26,845 INFO L137 encePairwiseOnDemand]: 73/84 looper letters, 165 selfloop transitions, 357 changer transitions 10/573 dead transitions. [2022-11-18 19:32:26,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 573 transitions, 8099 flow [2022-11-18 19:32:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 19:32:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 19:32:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2170 transitions. [2022-11-18 19:32:26,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6623931623931624 [2022-11-18 19:32:26,856 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2170 transitions. [2022-11-18 19:32:26,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2170 transitions. [2022-11-18 19:32:26,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:26,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2170 transitions. [2022-11-18 19:32:26,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.64102564102564) internal successors, (2170), 39 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:26,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:26,878 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:26,878 INFO L175 Difference]: Start difference. First operand has 179 places, 314 transitions, 3551 flow. Second operand 39 states and 2170 transitions. [2022-11-18 19:32:26,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 573 transitions, 8099 flow [2022-11-18 19:32:27,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 573 transitions, 7815 flow, removed 123 selfloop flow, removed 1 redundant places. [2022-11-18 19:32:27,060 INFO L231 Difference]: Finished difference. Result has 237 places, 478 transitions, 6782 flow [2022-11-18 19:32:27,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6782, PETRI_PLACES=237, PETRI_TRANSITIONS=478} [2022-11-18 19:32:27,062 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 163 predicate places. [2022-11-18 19:32:27,062 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 478 transitions, 6782 flow [2022-11-18 19:32:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.85) internal successors, (1077), 20 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:27,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:27,063 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:27,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-18 19:32:27,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:27,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1292017431, now seen corresponding path program 5 times [2022-11-18 19:32:27,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:27,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16991636] [2022-11-18 19:32:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:27,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:27,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16991636] [2022-11-18 19:32:27,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16991636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:27,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228395132] [2022-11-18 19:32:27,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:32:27,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:27,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:27,762 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:27,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:32:27,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:32:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:32:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:28,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228395132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:28,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:28,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-11-18 19:32:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524960543] [2022-11-18 19:32:28,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:28,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:32:28,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:32:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:32:28,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:32:28,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 478 transitions, 6782 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:28,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:28,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:32:28,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:30,728 INFO L130 PetriNetUnfolder]: 769/2454 cut-off events. [2022-11-18 19:32:30,728 INFO L131 PetriNetUnfolder]: For 62514/62542 co-relation queries the response was YES. [2022-11-18 19:32:30,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16405 conditions, 2454 events. 769/2454 cut-off events. For 62514/62542 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20356 event pairs, 16 based on Foata normal form. 17/2464 useless extension candidates. Maximal degree in co-relation 16339. Up to 450 conditions per place. [2022-11-18 19:32:30,770 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 259 selfloop transitions, 405 changer transitions 24/745 dead transitions. [2022-11-18 19:32:30,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 745 transitions, 12790 flow [2022-11-18 19:32:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:32:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 19:32:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1583 transitions. [2022-11-18 19:32:30,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.785218253968254 [2022-11-18 19:32:30,774 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1583 transitions. [2022-11-18 19:32:30,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1583 transitions. [2022-11-18 19:32:30,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:30,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1583 transitions. [2022-11-18 19:32:30,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.95833333333333) internal successors, (1583), 24 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:30,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:30,789 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:30,790 INFO L175 Difference]: Start difference. First operand has 237 places, 478 transitions, 6782 flow. Second operand 24 states and 1583 transitions. [2022-11-18 19:32:30,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 745 transitions, 12790 flow [2022-11-18 19:32:31,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 745 transitions, 12063 flow, removed 235 selfloop flow, removed 6 redundant places. [2022-11-18 19:32:31,098 INFO L231 Difference]: Finished difference. Result has 266 places, 664 transitions, 11526 flow [2022-11-18 19:32:31,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=6361, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11526, PETRI_PLACES=266, PETRI_TRANSITIONS=664} [2022-11-18 19:32:31,100 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 192 predicate places. [2022-11-18 19:32:31,100 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 664 transitions, 11526 flow [2022-11-18 19:32:31,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:31,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:31,102 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:31,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:31,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:31,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1598609715, now seen corresponding path program 6 times [2022-11-18 19:32:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:31,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725878679] [2022-11-18 19:32:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:31,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725878679] [2022-11-18 19:32:31,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725878679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893785831] [2022-11-18 19:32:31,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:32:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:31,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:31,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:32:32,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:32:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:32,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:32,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893785831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:32,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-18 19:32:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400372617] [2022-11-18 19:32:32,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:32:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:32:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:32:32,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:32:32,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 664 transitions, 11526 flow. Second operand has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:32,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:32,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:32:32,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:38,852 INFO L130 PetriNetUnfolder]: 920/3007 cut-off events. [2022-11-18 19:32:38,852 INFO L131 PetriNetUnfolder]: For 92261/92308 co-relation queries the response was YES. [2022-11-18 19:32:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21434 conditions, 3007 events. 920/3007 cut-off events. For 92261/92308 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26488 event pairs, 17 based on Foata normal form. 50/3045 useless extension candidates. Maximal degree in co-relation 21358. Up to 506 conditions per place. [2022-11-18 19:32:38,930 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 132 selfloop transitions, 761 changer transitions 28/978 dead transitions. [2022-11-18 19:32:38,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 978 transitions, 19461 flow [2022-11-18 19:32:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 19:32:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-18 19:32:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5288 transitions. [2022-11-18 19:32:38,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7771898883009994 [2022-11-18 19:32:38,944 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5288 transitions. [2022-11-18 19:32:38,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5288 transitions. [2022-11-18 19:32:38,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:38,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5288 transitions. [2022-11-18 19:32:38,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 65.28395061728395) internal successors, (5288), 81 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:38,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 84.0) internal successors, (6888), 82 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:38,982 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 84.0) internal successors, (6888), 82 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:38,990 INFO L175 Difference]: Start difference. First operand has 266 places, 664 transitions, 11526 flow. Second operand 81 states and 5288 transitions. [2022-11-18 19:32:38,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 978 transitions, 19461 flow [2022-11-18 19:32:39,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 978 transitions, 17872 flow, removed 753 selfloop flow, removed 7 redundant places. [2022-11-18 19:32:39,744 INFO L231 Difference]: Finished difference. Result has 364 places, 894 transitions, 17570 flow [2022-11-18 19:32:39,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10977, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=17570, PETRI_PLACES=364, PETRI_TRANSITIONS=894} [2022-11-18 19:32:39,746 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 290 predicate places. [2022-11-18 19:32:39,747 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 894 transitions, 17570 flow [2022-11-18 19:32:39,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:39,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:39,748 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:39,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:39,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:32:39,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -163587521, now seen corresponding path program 7 times [2022-11-18 19:32:39,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:39,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242349824] [2022-11-18 19:32:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:39,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:40,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:40,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242349824] [2022-11-18 19:32:40,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242349824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:40,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670594904] [2022-11-18 19:32:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:32:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:40,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:40,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:32:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:40,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:32:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:40,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:41,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670594904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:41,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:41,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 21 [2022-11-18 19:32:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242923982] [2022-11-18 19:32:41,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:41,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:32:41,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:32:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:32:41,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 19:32:41,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 894 transitions, 17570 flow. Second operand has 21 states, 21 states have (on average 54.0) internal successors, (1134), 21 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:41,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:41,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 19:32:41,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:46,581 INFO L130 PetriNetUnfolder]: 1260/3553 cut-off events. [2022-11-18 19:32:46,582 INFO L131 PetriNetUnfolder]: For 79098/79098 co-relation queries the response was YES. [2022-11-18 19:32:46,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28790 conditions, 3553 events. 1260/3553 cut-off events. For 79098/79098 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 29756 event pairs, 38 based on Foata normal form. 23/3566 useless extension candidates. Maximal degree in co-relation 28690. Up to 725 conditions per place. [2022-11-18 19:32:46,668 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 358 selfloop transitions, 947 changer transitions 5/1351 dead transitions. [2022-11-18 19:32:46,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1351 transitions, 30006 flow [2022-11-18 19:32:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-18 19:32:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-18 19:32:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3849 transitions. [2022-11-18 19:32:46,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6545918367346939 [2022-11-18 19:32:46,691 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3849 transitions. [2022-11-18 19:32:46,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3849 transitions. [2022-11-18 19:32:46,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:46,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3849 transitions. [2022-11-18 19:32:46,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 54.98571428571429) internal successors, (3849), 70 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 84.0) internal successors, (5964), 71 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,727 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 84.0) internal successors, (5964), 71 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,728 INFO L175 Difference]: Start difference. First operand has 364 places, 894 transitions, 17570 flow. Second operand 70 states and 3849 transitions. [2022-11-18 19:32:46,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1351 transitions, 30006 flow [2022-11-18 19:32:47,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1351 transitions, 29520 flow, removed 153 selfloop flow, removed 11 redundant places. [2022-11-18 19:32:47,755 INFO L231 Difference]: Finished difference. Result has 446 places, 1288 transitions, 29632 flow [2022-11-18 19:32:47,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=16937, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=29632, PETRI_PLACES=446, PETRI_TRANSITIONS=1288} [2022-11-18 19:32:47,757 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 372 predicate places. [2022-11-18 19:32:47,757 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1288 transitions, 29632 flow [2022-11-18 19:32:47,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.0) internal successors, (1134), 21 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:47,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:47,758 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:47,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:47,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:32:47,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1582584107, now seen corresponding path program 8 times [2022-11-18 19:32:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:47,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716749280] [2022-11-18 19:32:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:47,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:48,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716749280] [2022-11-18 19:32:48,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716749280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74628113] [2022-11-18 19:32:48,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:32:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:48,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:48,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:48,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:32:48,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:32:48,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:48,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:49,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74628113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:49,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:49,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-18 19:32:49,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323837895] [2022-11-18 19:32:49,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:49,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:32:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:32:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:32:49,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:32:49,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1288 transitions, 29632 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:49,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:49,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:32:49,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:32:54,313 INFO L130 PetriNetUnfolder]: 1504/4173 cut-off events. [2022-11-18 19:32:54,313 INFO L131 PetriNetUnfolder]: For 120408/120410 co-relation queries the response was YES. [2022-11-18 19:32:54,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38820 conditions, 4173 events. 1504/4173 cut-off events. For 120408/120410 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 36012 event pairs, 29 based on Foata normal form. 13/4175 useless extension candidates. Maximal degree in co-relation 38687. Up to 858 conditions per place. [2022-11-18 19:32:54,398 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 457 selfloop transitions, 1105 changer transitions 18/1651 dead transitions. [2022-11-18 19:32:54,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1651 transitions, 41405 flow [2022-11-18 19:32:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 19:32:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-18 19:32:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3422 transitions. [2022-11-18 19:32:54,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7834249084249084 [2022-11-18 19:32:54,405 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3422 transitions. [2022-11-18 19:32:54,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3422 transitions. [2022-11-18 19:32:54,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:32:54,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3422 transitions. [2022-11-18 19:32:54,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.8076923076923) internal successors, (3422), 52 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:54,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:54,423 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:54,423 INFO L175 Difference]: Start difference. First operand has 446 places, 1288 transitions, 29632 flow. Second operand 52 states and 3422 transitions. [2022-11-18 19:32:54,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1651 transitions, 41405 flow [2022-11-18 19:32:56,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1651 transitions, 40702 flow, removed 297 selfloop flow, removed 10 redundant places. [2022-11-18 19:32:56,314 INFO L231 Difference]: Finished difference. Result has 498 places, 1575 transitions, 40380 flow [2022-11-18 19:32:56,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28897, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=40380, PETRI_PLACES=498, PETRI_TRANSITIONS=1575} [2022-11-18 19:32:56,316 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 424 predicate places. [2022-11-18 19:32:56,316 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1575 transitions, 40380 flow [2022-11-18 19:32:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:56,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:32:56,317 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:56,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:56,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:32:56,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:32:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1785432957, now seen corresponding path program 9 times [2022-11-18 19:32:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529557763] [2022-11-18 19:32:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:56,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:56,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:56,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529557763] [2022-11-18 19:32:56,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529557763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:56,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380917866] [2022-11-18 19:32:56,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:32:56,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:56,930 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:56,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:32:57,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 19:32:57,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:57,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:57,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380917866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:57,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:32:57,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-18 19:32:57,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478193508] [2022-11-18 19:32:57,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:57,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:32:57,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:32:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:32:57,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:32:57,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1575 transitions, 40380 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:57,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:32:57,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:32:57,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:33:03,772 INFO L130 PetriNetUnfolder]: 1797/4907 cut-off events. [2022-11-18 19:33:03,773 INFO L131 PetriNetUnfolder]: For 177578/177580 co-relation queries the response was YES. [2022-11-18 19:33:03,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50479 conditions, 4907 events. 1797/4907 cut-off events. For 177578/177580 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 43388 event pairs, 63 based on Foata normal form. 7/4905 useless extension candidates. Maximal degree in co-relation 50331. Up to 1065 conditions per place. [2022-11-18 19:33:03,876 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 493 selfloop transitions, 1427 changer transitions 8/1999 dead transitions. [2022-11-18 19:33:03,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1999 transitions, 56028 flow [2022-11-18 19:33:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 19:33:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 19:33:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2564 transitions. [2022-11-18 19:33:03,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7826617826617827 [2022-11-18 19:33:03,882 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2564 transitions. [2022-11-18 19:33:03,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2564 transitions. [2022-11-18 19:33:03,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:33:03,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2564 transitions. [2022-11-18 19:33:03,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.74358974358974) internal successors, (2564), 39 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:03,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:03,896 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:03,896 INFO L175 Difference]: Start difference. First operand has 498 places, 1575 transitions, 40380 flow. Second operand 39 states and 2564 transitions. [2022-11-18 19:33:03,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1999 transitions, 56028 flow [2022-11-18 19:33:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1999 transitions, 55142 flow, removed 248 selfloop flow, removed 13 redundant places. [2022-11-18 19:33:07,420 INFO L231 Difference]: Finished difference. Result has 533 places, 1951 transitions, 56044 flow [2022-11-18 19:33:07,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=39805, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=56044, PETRI_PLACES=533, PETRI_TRANSITIONS=1951} [2022-11-18 19:33:07,422 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 459 predicate places. [2022-11-18 19:33:07,422 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1951 transitions, 56044 flow [2022-11-18 19:33:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:07,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:33:07,423 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:33:07,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:07,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:33:07,629 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:33:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1059613473, now seen corresponding path program 10 times [2022-11-18 19:33:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702342355] [2022-11-18 19:33:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702342355] [2022-11-18 19:33:08,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702342355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430359732] [2022-11-18 19:33:08,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:33:08,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:08,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:08,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:08,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:33:08,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:33:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:08,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:08,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:08,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430359732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:08,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:08,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-11-18 19:33:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468547109] [2022-11-18 19:33:08,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:08,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:33:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:33:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:33:08,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 19:33:08,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1951 transitions, 56044 flow. Second operand has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:08,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:33:08,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 19:33:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:33:17,859 INFO L130 PetriNetUnfolder]: 2100/5659 cut-off events. [2022-11-18 19:33:17,859 INFO L131 PetriNetUnfolder]: For 234355/234355 co-relation queries the response was YES. [2022-11-18 19:33:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63433 conditions, 5659 events. 2100/5659 cut-off events. For 234355/234355 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 51606 event pairs, 48 based on Foata normal form. 52/5702 useless extension candidates. Maximal degree in co-relation 63273. Up to 1306 conditions per place. [2022-11-18 19:33:18,016 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 653 selfloop transitions, 1773 changer transitions 4/2471 dead transitions. [2022-11-18 19:33:18,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 2471 transitions, 75896 flow [2022-11-18 19:33:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-18 19:33:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-18 19:33:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3129 transitions. [2022-11-18 19:33:18,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535087719298246 [2022-11-18 19:33:18,023 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3129 transitions. [2022-11-18 19:33:18,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3129 transitions. [2022-11-18 19:33:18,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:33:18,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3129 transitions. [2022-11-18 19:33:18,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 54.89473684210526) internal successors, (3129), 57 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:18,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:18,041 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 84.0) internal successors, (4872), 58 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:18,041 INFO L175 Difference]: Start difference. First operand has 533 places, 1951 transitions, 56044 flow. Second operand 57 states and 3129 transitions. [2022-11-18 19:33:18,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 2471 transitions, 75896 flow [2022-11-18 19:33:22,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 2471 transitions, 75060 flow, removed 253 selfloop flow, removed 13 redundant places. [2022-11-18 19:33:22,833 INFO L231 Difference]: Finished difference. Result has 593 places, 2382 transitions, 74963 flow [2022-11-18 19:33:22,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=55232, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=74963, PETRI_PLACES=593, PETRI_TRANSITIONS=2382} [2022-11-18 19:33:22,835 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 519 predicate places. [2022-11-18 19:33:22,835 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 2382 transitions, 74963 flow [2022-11-18 19:33:22,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.15) internal successors, (1083), 20 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:22,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:33:22,836 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:33:22,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:33:23,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:33:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1885125439, now seen corresponding path program 11 times [2022-11-18 19:33:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:23,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457346139] [2022-11-18 19:33:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:23,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:23,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457346139] [2022-11-18 19:33:23,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457346139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579443465] [2022-11-18 19:33:23,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:33:23,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:23,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:23,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:23,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:33:23,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:23,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:23,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:33:23,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:23,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:24,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579443465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:24,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:24,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2022-11-18 19:33:24,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688946235] [2022-11-18 19:33:24,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:24,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:33:24,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:33:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:33:24,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:33:24,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 2382 transitions, 74963 flow. Second operand has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:33:24,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:33:24,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:33:39,387 INFO L130 PetriNetUnfolder]: 2534/7105 cut-off events. [2022-11-18 19:33:39,387 INFO L131 PetriNetUnfolder]: For 335176/335180 co-relation queries the response was YES. [2022-11-18 19:33:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84823 conditions, 7105 events. 2534/7105 cut-off events. For 335176/335180 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 69447 event pairs, 35 based on Foata normal form. 40/7120 useless extension candidates. Maximal degree in co-relation 84648. Up to 1528 conditions per place. [2022-11-18 19:33:39,626 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 339 selfloop transitions, 2564 changer transitions 3/2994 dead transitions. [2022-11-18 19:33:39,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 2994 transitions, 100448 flow [2022-11-18 19:33:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-18 19:33:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-18 19:33:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5424 transitions. [2022-11-18 19:33:39,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7779690189328744 [2022-11-18 19:33:39,640 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5424 transitions. [2022-11-18 19:33:39,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5424 transitions. [2022-11-18 19:33:39,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:33:39,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5424 transitions. [2022-11-18 19:33:39,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 65.34939759036145) internal successors, (5424), 83 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:39,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 84.0) internal successors, (7056), 84 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:39,670 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 84.0) internal successors, (7056), 84 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:39,670 INFO L175 Difference]: Start difference. First operand has 593 places, 2382 transitions, 74963 flow. Second operand 83 states and 5424 transitions. [2022-11-18 19:33:39,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 2994 transitions, 100448 flow [2022-11-18 19:33:47,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 2994 transitions, 99708 flow, removed 198 selfloop flow, removed 14 redundant places. [2022-11-18 19:33:47,663 INFO L231 Difference]: Finished difference. Result has 678 places, 2921 transitions, 99783 flow [2022-11-18 19:33:47,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=74215, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2035, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=99783, PETRI_PLACES=678, PETRI_TRANSITIONS=2921} [2022-11-18 19:33:47,666 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 604 predicate places. [2022-11-18 19:33:47,666 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2921 transitions, 99783 flow [2022-11-18 19:33:47,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:47,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:33:47,667 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:33:47,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:47,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:33:47,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:33:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash 536604281, now seen corresponding path program 12 times [2022-11-18 19:33:47,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:47,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730135694] [2022-11-18 19:33:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:47,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730135694] [2022-11-18 19:33:48,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730135694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516634385] [2022-11-18 19:33:48,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:33:48,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:48,171 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:48,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:33:48,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 19:33:48,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:48,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:33:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:48,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:48,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516634385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:48,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:48,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-11-18 19:33:48,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870154993] [2022-11-18 19:33:48,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:33:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:33:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:33:48,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:33:48,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2921 transitions, 99783 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:48,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:33:48,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:33:48,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:01,522 INFO L130 PetriNetUnfolder]: 2588/7220 cut-off events. [2022-11-18 19:34:01,522 INFO L131 PetriNetUnfolder]: For 363354/363358 co-relation queries the response was YES. [2022-11-18 19:34:01,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92078 conditions, 7220 events. 2588/7220 cut-off events. For 363354/363358 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 70370 event pairs, 89 based on Foata normal form. 6/7210 useless extension candidates. Maximal degree in co-relation 91885. Up to 1548 conditions per place. [2022-11-18 19:34:01,727 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 331 selfloop transitions, 2626 changer transitions 7/3052 dead transitions. [2022-11-18 19:34:01,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 3052 transitions, 110231 flow [2022-11-18 19:34:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-18 19:34:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-18 19:34:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3848 transitions. [2022-11-18 19:34:01,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7764326069410815 [2022-11-18 19:34:01,737 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3848 transitions. [2022-11-18 19:34:01,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3848 transitions. [2022-11-18 19:34:01,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:01,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3848 transitions. [2022-11-18 19:34:01,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 65.22033898305085) internal successors, (3848), 59 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:01,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 84.0) internal successors, (5040), 60 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:01,753 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 84.0) internal successors, (5040), 60 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:01,754 INFO L175 Difference]: Start difference. First operand has 678 places, 2921 transitions, 99783 flow. Second operand 59 states and 3848 transitions. [2022-11-18 19:34:01,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 3052 transitions, 110231 flow [2022-11-18 19:34:09,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 3052 transitions, 107400 flow, removed 1066 selfloop flow, removed 27 redundant places. [2022-11-18 19:34:09,914 INFO L231 Difference]: Finished difference. Result has 719 places, 3028 transitions, 109726 flow [2022-11-18 19:34:09,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=97252, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=109726, PETRI_PLACES=719, PETRI_TRANSITIONS=3028} [2022-11-18 19:34:09,916 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 645 predicate places. [2022-11-18 19:34:09,916 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 3028 transitions, 109726 flow [2022-11-18 19:34:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:09,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:09,917 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:34:09,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:10,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:10,122 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1344498987, now seen corresponding path program 13 times [2022-11-18 19:34:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:10,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875512768] [2022-11-18 19:34:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:10,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:10,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875512768] [2022-11-18 19:34:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875512768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770368830] [2022-11-18 19:34:10,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:34:10,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:10,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:10,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:10,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:34:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:34:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:10,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:10,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770368830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:10,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:10,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-11-18 19:34:10,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676717563] [2022-11-18 19:34:10,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:10,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:34:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:10,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:34:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:34:10,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:34:10,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 3028 transitions, 109726 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:10,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:10,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:34:10,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:23,420 INFO L130 PetriNetUnfolder]: 2712/7389 cut-off events. [2022-11-18 19:34:23,420 INFO L131 PetriNetUnfolder]: For 357182/357184 co-relation queries the response was YES. [2022-11-18 19:34:23,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99387 conditions, 7389 events. 2712/7389 cut-off events. For 357182/357184 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 71282 event pairs, 94 based on Foata normal form. 1/7370 useless extension candidates. Maximal degree in co-relation 99194. Up to 1673 conditions per place. [2022-11-18 19:34:23,691 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 934 selfloop transitions, 2233 changer transitions 3/3258 dead transitions. [2022-11-18 19:34:23,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 3258 transitions, 124847 flow [2022-11-18 19:34:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 19:34:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 19:34:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1909 transitions. [2022-11-18 19:34:23,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7836617405582923 [2022-11-18 19:34:23,696 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1909 transitions. [2022-11-18 19:34:23,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1909 transitions. [2022-11-18 19:34:23,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:23,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1909 transitions. [2022-11-18 19:34:23,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.82758620689656) internal successors, (1909), 29 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:23,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:23,706 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 84.0) internal successors, (2520), 30 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:23,707 INFO L175 Difference]: Start difference. First operand has 719 places, 3028 transitions, 109726 flow. Second operand 29 states and 1909 transitions. [2022-11-18 19:34:23,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 3258 transitions, 124847 flow [2022-11-18 19:34:33,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 3258 transitions, 122902 flow, removed 160 selfloop flow, removed 21 redundant places. [2022-11-18 19:34:33,581 INFO L231 Difference]: Finished difference. Result has 728 places, 3245 transitions, 121678 flow [2022-11-18 19:34:33,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=107580, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2004, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=121678, PETRI_PLACES=728, PETRI_TRANSITIONS=3245} [2022-11-18 19:34:33,583 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 654 predicate places. [2022-11-18 19:34:33,583 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 3245 transitions, 121678 flow [2022-11-18 19:34:33,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:33,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:34:33,583 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:34:33,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:33,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:34:33,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:34:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1473743989, now seen corresponding path program 14 times [2022-11-18 19:34:33,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:33,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231492580] [2022-11-18 19:34:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:33,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:34,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231492580] [2022-11-18 19:34:34,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231492580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:34,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508235740] [2022-11-18 19:34:34,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:34,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:34,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:34,183 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:34,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:34:34,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:34,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:34,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:34,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508235740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:34,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:34,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 23 [2022-11-18 19:34:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136361841] [2022-11-18 19:34:34,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 19:34:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 19:34:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:34:34,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 19:34:34,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 3245 transitions, 121678 flow. Second operand has 23 states, 23 states have (on average 53.78260869565217) internal successors, (1237), 23 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:34,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:34:34,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 19:34:34,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:34:57,937 INFO L130 PetriNetUnfolder]: 3313/9220 cut-off events. [2022-11-18 19:34:57,937 INFO L131 PetriNetUnfolder]: For 450097/450097 co-relation queries the response was YES. [2022-11-18 19:34:58,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127545 conditions, 9220 events. 3313/9220 cut-off events. For 450097/450097 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 93628 event pairs, 96 based on Foata normal form. 58/9260 useless extension candidates. Maximal degree in co-relation 127349. Up to 2033 conditions per place. [2022-11-18 19:34:58,202 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 1378 selfloop transitions, 2799 changer transitions 47/4265 dead transitions. [2022-11-18 19:34:58,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 4265 transitions, 167927 flow [2022-11-18 19:34:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-18 19:34:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-18 19:34:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4116 transitions. [2022-11-18 19:34:58,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6621621621621622 [2022-11-18 19:34:58,210 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4116 transitions. [2022-11-18 19:34:58,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4116 transitions. [2022-11-18 19:34:58,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:34:58,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4116 transitions. [2022-11-18 19:34:58,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 55.62162162162162) internal successors, (4116), 74 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,231 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 84.0) internal successors, (6300), 75 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:58,232 INFO L175 Difference]: Start difference. First operand has 728 places, 3245 transitions, 121678 flow. Second operand 74 states and 4116 transitions. [2022-11-18 19:34:58,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 4265 transitions, 167927 flow [2022-11-18 19:35:12,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 4265 transitions, 166304 flow, removed 11 selfloop flow, removed 15 redundant places. [2022-11-18 19:35:12,304 INFO L231 Difference]: Finished difference. Result has 835 places, 4038 transitions, 163346 flow [2022-11-18 19:35:12,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=120239, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=163346, PETRI_PLACES=835, PETRI_TRANSITIONS=4038} [2022-11-18 19:35:12,307 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 761 predicate places. [2022-11-18 19:35:12,307 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 4038 transitions, 163346 flow [2022-11-18 19:35:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.78260869565217) internal successors, (1237), 23 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:12,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:12,308 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:35:12,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:12,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:35:12,514 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:35:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -336423823, now seen corresponding path program 15 times [2022-11-18 19:35:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466722770] [2022-11-18 19:35:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:12,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:13,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466722770] [2022-11-18 19:35:13,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466722770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454551045] [2022-11-18 19:35:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:35:13,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:13,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:13,011 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:13,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 19:35:13,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:35:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:35:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:35:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:13,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454551045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:13,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:35:13,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-11-18 19:35:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129342026] [2022-11-18 19:35:13,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:35:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:35:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:35:13,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:35:13,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 4038 transitions, 163346 flow. Second operand has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:13,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:13,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:35:13,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:39,433 INFO L130 PetriNetUnfolder]: 3687/10314 cut-off events. [2022-11-18 19:35:39,433 INFO L131 PetriNetUnfolder]: For 605584/605591 co-relation queries the response was YES. [2022-11-18 19:35:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153787 conditions, 10314 events. 3687/10314 cut-off events. For 605584/605591 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 107660 event pairs, 59 based on Foata normal form. 55/10344 useless extension candidates. Maximal degree in co-relation 153538. Up to 2234 conditions per place. [2022-11-18 19:35:39,761 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 1150 selfloop transitions, 3283 changer transitions 0/4566 dead transitions. [2022-11-18 19:35:39,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 4566 transitions, 194484 flow [2022-11-18 19:35:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 19:35:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-18 19:35:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2264 transitions. [2022-11-18 19:35:39,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7927170868347339 [2022-11-18 19:35:39,765 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2264 transitions. [2022-11-18 19:35:39,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2264 transitions. [2022-11-18 19:35:39,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:39,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2264 transitions. [2022-11-18 19:35:39,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.58823529411765) internal successors, (2264), 34 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:39,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:39,775 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:39,775 INFO L175 Difference]: Start difference. First operand has 835 places, 4038 transitions, 163346 flow. Second operand 34 states and 2264 transitions. [2022-11-18 19:35:39,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 4566 transitions, 194484 flow [2022-11-18 19:35:59,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 4566 transitions, 192683 flow, removed 768 selfloop flow, removed 17 redundant places. [2022-11-18 19:36:00,083 INFO L231 Difference]: Finished difference. Result has 857 places, 4434 transitions, 192955 flow [2022-11-18 19:36:00,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=161514, PETRI_DIFFERENCE_MINUEND_PLACES=808, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=192955, PETRI_PLACES=857, PETRI_TRANSITIONS=4434} [2022-11-18 19:36:00,085 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 783 predicate places. [2022-11-18 19:36:00,085 INFO L495 AbstractCegarLoop]: Abstraction has has 857 places, 4434 transitions, 192955 flow [2022-11-18 19:36:00,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:00,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:36:00,086 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:36:00,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:36:00,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:00,288 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:36:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash 618954613, now seen corresponding path program 16 times [2022-11-18 19:36:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986316377] [2022-11-18 19:36:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:00,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986316377] [2022-11-18 19:36:00,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986316377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:36:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536502669] [2022-11-18 19:36:00,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:36:00,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:00,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:00,599 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:36:00,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 19:36:00,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:36:00,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:36:00,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:36:00,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:36:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:00,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:36:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:01,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536502669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:36:01,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:36:01,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-18 19:36:01,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148363095] [2022-11-18 19:36:01,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:36:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:36:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:36:01,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:36:01,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:36:01,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 857 places, 4434 transitions, 192955 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:01,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:36:01,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:36:01,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:36:27,480 INFO L130 PetriNetUnfolder]: 3705/10468 cut-off events. [2022-11-18 19:36:27,481 INFO L131 PetriNetUnfolder]: For 707974/707981 co-relation queries the response was YES. [2022-11-18 19:36:27,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161668 conditions, 10468 events. 3705/10468 cut-off events. For 707974/707981 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 109850 event pairs, 57 based on Foata normal form. 13/10458 useless extension candidates. Maximal degree in co-relation 161415. Up to 2234 conditions per place. [2022-11-18 19:36:27,857 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 726 selfloop transitions, 3655 changer transitions 10/4524 dead transitions. [2022-11-18 19:36:27,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 4524 transitions, 204945 flow [2022-11-18 19:36:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 19:36:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-18 19:36:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-11-18 19:36:27,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-11-18 19:36:27,861 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-11-18 19:36:27,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-11-18 19:36:27,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:36:27,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-11-18 19:36:27,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:27,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:27,870 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:27,870 INFO L175 Difference]: Start difference. First operand has 857 places, 4434 transitions, 192955 flow. Second operand 40 states and 2634 transitions. [2022-11-18 19:36:27,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 4524 transitions, 204945 flow [2022-11-18 19:36:48,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4524 transitions, 204273 flow, removed 170 selfloop flow, removed 10 redundant places. [2022-11-18 19:36:48,609 INFO L231 Difference]: Finished difference. Result has 890 places, 4465 transitions, 203783 flow [2022-11-18 19:36:48,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=191553, PETRI_DIFFERENCE_MINUEND_PLACES=847, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=203783, PETRI_PLACES=890, PETRI_TRANSITIONS=4465} [2022-11-18 19:36:48,611 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 816 predicate places. [2022-11-18 19:36:48,611 INFO L495 AbstractCegarLoop]: Abstraction has has 890 places, 4465 transitions, 203783 flow [2022-11-18 19:36:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:48,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:36:48,612 INFO L209 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, 1, 1, 1, 1, 1] [2022-11-18 19:36:48,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:36:48,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:48,818 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:36:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1014969681, now seen corresponding path program 17 times [2022-11-18 19:36:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:48,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863446684] [2022-11-18 19:36:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:48,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:49,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:49,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863446684] [2022-11-18 19:36:49,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863446684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:36:49,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070429228] [2022-11-18 19:36:49,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:36:49,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:49,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:49,173 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:36:49,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23a7a9af-3022-4bee-867b-6576774f5070/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 19:36:49,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:36:49,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:36:49,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:36:49,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:36:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:49,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:36:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:49,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070429228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:36:49,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:36:49,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2022-11-18 19:36:49,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431471422] [2022-11-18 19:36:49,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:36:49,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:36:49,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:49,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:36:49,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:36:49,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-11-18 19:36:49,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 890 places, 4465 transitions, 203783 flow. Second operand has 21 states, 21 states have (on average 64.0) internal successors, (1344), 21 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:49,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:36:49,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-11-18 19:36:49,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand