./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:12:16,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:12:16,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:12:16,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:12:16,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:12:16,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:12:16,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:12:16,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:12:16,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:12:16,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:12:16,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:12:16,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:12:16,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:12:16,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:12:16,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:12:16,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:12:16,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:12:16,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:12:16,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:12:16,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:12:16,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:12:16,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:12:16,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:12:16,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:12:16,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:12:16,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:12:16,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:12:16,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:12:16,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:12:16,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:12:16,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:12:16,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:12:16,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:12:16,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:12:16,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:12:16,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:12:16,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:12:16,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:12:16,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:12:16,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:12:16,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:12:16,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:12:16,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:12:16,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:12:16,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:12:16,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:12:16,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:12:16,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:12:16,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:12:16,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:12:16,535 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:12:16,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:12:16,537 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:12:16,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:12:16,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:12:16,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:12:16,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:12:16,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:12:16,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:12:16,538 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:12:16,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:12:16,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:12:16,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:12:16,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:12:16,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:12:16,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:12:16,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:12:16,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:12:16,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:12:16,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:12:16,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:12:16,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:12:16,543 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:12:16,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:12:16,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:12:16,544 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_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2022-11-02 20:12:16,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:12:16,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:12:16,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:12:16,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:12:16,939 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:12:16,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-11-02 20:12:17,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/data/773b41b6b/574f0960f4694b488b310ef4bd31fad7/FLAG61f8ae2d7 [2022-11-02 20:12:17,580 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:12:17,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-11-02 20:12:17,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/data/773b41b6b/574f0960f4694b488b310ef4bd31fad7/FLAG61f8ae2d7 [2022-11-02 20:12:17,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/data/773b41b6b/574f0960f4694b488b310ef4bd31fad7 [2022-11-02 20:12:17,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:12:17,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:12:17,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:12:17,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:12:17,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:12:17,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:12:17" (1/1) ... [2022-11-02 20:12:17,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b280e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:17, skipping insertion in model container [2022-11-02 20:12:17,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:12:17" (1/1) ... [2022-11-02 20:12:17,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:12:17,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:12:18,250 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-11-02 20:12:18,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:12:18,273 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:12:18,315 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-11-02 20:12:18,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:12:18,336 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:12:18,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18 WrapperNode [2022-11-02 20:12:18,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:12:18,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:12:18,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:12:18,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:12:18,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,397 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 235 [2022-11-02 20:12:18,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:12:18,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:12:18,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:12:18,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:12:18,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:12:18,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:12:18,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:12:18,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:12:18,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (1/1) ... [2022-11-02 20:12:18,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:12:18,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:18,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:12:18,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:12:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:12:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:12:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:12:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:12:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:12:18,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:12:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:12:18,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:12:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 20:12:18,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 20:12:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:12:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:12:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:12:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:12:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:12:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:12:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:12:18,555 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:12:18,719 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:12:18,721 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:12:19,247 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:12:19,396 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:12:19,409 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:12:19,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:12:19 BoogieIcfgContainer [2022-11-02 20:12:19,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:12:19,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:12:19,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:12:19,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:12:19,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:12:17" (1/3) ... [2022-11-02 20:12:19,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b70213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:12:19, skipping insertion in model container [2022-11-02 20:12:19,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:18" (2/3) ... [2022-11-02 20:12:19,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b70213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:12:19, skipping insertion in model container [2022-11-02 20:12:19,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:12:19" (3/3) ... [2022-11-02 20:12:19,427 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2022-11-02 20:12:19,438 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:12:19,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:12:19,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:12:19,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:12:19,574 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 20:12:19,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 186 transitions, 396 flow [2022-11-02 20:12:19,741 INFO L130 PetriNetUnfolder]: 7/183 cut-off events. [2022-11-02 20:12:19,741 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:12:19,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 7/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-11-02 20:12:19,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 186 transitions, 396 flow [2022-11-02 20:12:19,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 172 transitions, 362 flow [2022-11-02 20:12:19,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:12:19,768 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;@55330032, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:12:19,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 20:12:19,817 INFO L130 PetriNetUnfolder]: 7/171 cut-off events. [2022-11-02 20:12:19,817 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 20:12:19,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:19,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:19,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:12:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash 376216853, now seen corresponding path program 1 times [2022-11-02 20:12:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037809454] [2022-11-02 20:12:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:12:21,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:21,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037809454] [2022-11-02 20:12:21,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037809454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:21,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:21,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:12:21,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830446428] [2022-11-02 20:12:21,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:12:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:12:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:12:21,231 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 186 [2022-11-02 20:12:21,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 172 transitions, 362 flow. Second operand has 8 states, 8 states have (on average 127.125) internal successors, (1017), 8 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:21,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:21,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 186 [2022-11-02 20:12:21,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:12:22,069 INFO L130 PetriNetUnfolder]: 312/872 cut-off events. [2022-11-02 20:12:22,070 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-11-02 20:12:22,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 872 events. 312/872 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4391 event pairs, 311 based on Foata normal form. 7/866 useless extension candidates. Maximal degree in co-relation 1300. Up to 559 conditions per place. [2022-11-02 20:12:22,088 INFO L137 encePairwiseOnDemand]: 169/186 looper letters, 51 selfloop transitions, 6 changer transitions 15/180 dead transitions. [2022-11-02 20:12:22,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 180 transitions, 522 flow [2022-11-02 20:12:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:12:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 20:12:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1292 transitions. [2022-11-02 20:12:22,117 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6946236559139785 [2022-11-02 20:12:22,118 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1292 transitions. [2022-11-02 20:12:22,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1292 transitions. [2022-11-02 20:12:22,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:12:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1292 transitions. [2022-11-02 20:12:22,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 129.2) internal successors, (1292), 10 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:22,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 186.0) internal successors, (2046), 11 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:22,149 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 186.0) internal successors, (2046), 11 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:22,152 INFO L175 Difference]: Start difference. First operand has 175 places, 172 transitions, 362 flow. Second operand 10 states and 1292 transitions. [2022-11-02 20:12:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 180 transitions, 522 flow [2022-11-02 20:12:22,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 180 transitions, 510 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 20:12:22,167 INFO L231 Difference]: Finished difference. Result has 182 places, 162 transitions, 354 flow [2022-11-02 20:12:22,169 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=354, PETRI_PLACES=182, PETRI_TRANSITIONS=162} [2022-11-02 20:12:22,174 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 7 predicate places. [2022-11-02 20:12:22,174 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 162 transitions, 354 flow [2022-11-02 20:12:22,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 127.125) internal successors, (1017), 8 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:22,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:12:22,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:22,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:12:22,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:12:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 859272407, now seen corresponding path program 1 times [2022-11-02 20:12:22,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564752638] [2022-11-02 20:12:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:12:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564752638] [2022-11-02 20:12:26,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564752638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199037137] [2022-11-02 20:12:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:26,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:26,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:26,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:26,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:12:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 20:12:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:27,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 20:12:28,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:12:29,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:12:29,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:12:30,573 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:12:30,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:12:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:12:30,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:38,866 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:12:38,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2022-11-02 20:12:38,889 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:12:38,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 2016 treesize of output 1908 [2022-11-02 20:12:38,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:12:38,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 2224 treesize of output 1964 [2022-11-02 20:12:39,044 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:12:39,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1936 treesize of output 1388 [2022-11-02 20:12:39,135 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:12:39,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1360 treesize of output 1244 [2022-11-02 20:12:45,720 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:12:45,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 1 [2022-11-02 20:12:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:12:46,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199037137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:46,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:46,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33, 28] total 80 [2022-11-02 20:12:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108000623] [2022-11-02 20:12:46,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:46,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-02 20:12:46,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:46,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-02 20:12:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=5509, Unknown=168, NotChecked=0, Total=6320 [2022-11-02 20:12:46,222 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 186 [2022-11-02 20:12:46,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 162 transitions, 354 flow. Second operand has 80 states, 80 states have (on average 91.55) internal successors, (7324), 80 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:12:46,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:12:46,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 186 [2022-11-02 20:12:46,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:30,907 INFO L130 PetriNetUnfolder]: 2380/5393 cut-off events. [2022-11-02 20:13:30,907 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-02 20:13:30,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9463 conditions, 5393 events. 2380/5393 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45071 event pairs, 937 based on Foata normal form. 4/5344 useless extension candidates. Maximal degree in co-relation 9338. Up to 1219 conditions per place. [2022-11-02 20:13:30,930 INFO L137 encePairwiseOnDemand]: 138/186 looper letters, 71 selfloop transitions, 17 changer transitions 479/649 dead transitions. [2022-11-02 20:13:30,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 649 transitions, 2543 flow [2022-11-02 20:13:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-02 20:13:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-02 20:13:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 8670 transitions. [2022-11-02 20:13:30,953 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5122297057780929 [2022-11-02 20:13:30,953 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 8670 transitions. [2022-11-02 20:13:30,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 8670 transitions. [2022-11-02 20:13:30,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:30,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 8670 transitions. [2022-11-02 20:13:30,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 95.27472527472527) internal successors, (8670), 91 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:31,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 186.0) internal successors, (17112), 92 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:31,012 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 186.0) internal successors, (17112), 92 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:31,013 INFO L175 Difference]: Start difference. First operand has 182 places, 162 transitions, 354 flow. Second operand 91 states and 8670 transitions. [2022-11-02 20:13:31,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 649 transitions, 2543 flow [2022-11-02 20:13:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 649 transitions, 2521 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-11-02 20:13:31,026 INFO L231 Difference]: Finished difference. Result has 333 places, 166 transitions, 778 flow [2022-11-02 20:13:31,027 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=778, PETRI_PLACES=333, PETRI_TRANSITIONS=166} [2022-11-02 20:13:31,028 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 158 predicate places. [2022-11-02 20:13:31,028 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 166 transitions, 778 flow [2022-11-02 20:13:31,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 91.55) internal successors, (7324), 80 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:31,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:31,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:31,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:13:31,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:31,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:13:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 242844385, now seen corresponding path program 2 times [2022-11-02 20:13:31,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070577141] [2022-11-02 20:13:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:31,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:13:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070577141] [2022-11-02 20:13:31,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070577141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:31,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:13:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568306113] [2022-11-02 20:13:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:31,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:13:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:13:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:13:31,689 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 186 [2022-11-02 20:13:31,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 166 transitions, 778 flow. Second operand has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:31,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:31,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 186 [2022-11-02 20:13:31,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:33,737 INFO L130 PetriNetUnfolder]: 1751/3762 cut-off events. [2022-11-02 20:13:33,738 INFO L131 PetriNetUnfolder]: For 243036/244124 co-relation queries the response was YES. [2022-11-02 20:13:33,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34309 conditions, 3762 events. 1751/3762 cut-off events. For 243036/244124 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 28064 event pairs, 840 based on Foata normal form. 46/3571 useless extension candidates. Maximal degree in co-relation 34214. Up to 1108 conditions per place. [2022-11-02 20:13:33,897 INFO L137 encePairwiseOnDemand]: 176/186 looper letters, 93 selfloop transitions, 18 changer transitions 0/246 dead transitions. [2022-11-02 20:13:33,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 246 transitions, 2524 flow [2022-11-02 20:13:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:13:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:13:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2022-11-02 20:13:33,903 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8626045400238949 [2022-11-02 20:13:33,903 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2022-11-02 20:13:33,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2022-11-02 20:13:33,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:33,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2022-11-02 20:13:33,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:33,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:33,915 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:33,916 INFO L175 Difference]: Start difference. First operand has 333 places, 166 transitions, 778 flow. Second operand 9 states and 1444 transitions. [2022-11-02 20:13:33,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 246 transitions, 2524 flow [2022-11-02 20:13:34,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 246 transitions, 1362 flow, removed 568 selfloop flow, removed 69 redundant places. [2022-11-02 20:13:34,283 INFO L231 Difference]: Finished difference. Result has 204 places, 180 transitions, 606 flow [2022-11-02 20:13:34,284 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=606, PETRI_PLACES=204, PETRI_TRANSITIONS=180} [2022-11-02 20:13:34,286 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 29 predicate places. [2022-11-02 20:13:34,287 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 180 transitions, 606 flow [2022-11-02 20:13:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:34,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:34,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:13:34,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:13:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1385200505, now seen corresponding path program 3 times [2022-11-02 20:13:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:34,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136051480] [2022-11-02 20:13:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:34,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:46,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136051480] [2022-11-02 20:13:46,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136051480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:46,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368118705] [2022-11-02 20:13:46,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:13:46,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:46,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:46,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:13:46,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-02 20:13:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:13:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:46,995 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:46,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:13:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:13:47,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:13:47,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368118705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:47,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:13:47,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [41] total 48 [2022-11-02 20:13:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47568130] [2022-11-02 20:13:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:47,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:13:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:13:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2103, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:13:47,039 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2022-11-02 20:13:47,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 180 transitions, 606 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:47,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:47,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2022-11-02 20:13:47,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:49,438 INFO L130 PetriNetUnfolder]: 2807/5859 cut-off events. [2022-11-02 20:13:49,439 INFO L131 PetriNetUnfolder]: For 32121/32294 co-relation queries the response was YES. [2022-11-02 20:13:49,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26532 conditions, 5859 events. 2807/5859 cut-off events. For 32121/32294 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 47291 event pairs, 723 based on Foata normal form. 2/5702 useless extension candidates. Maximal degree in co-relation 26380. Up to 2513 conditions per place. [2022-11-02 20:13:49,545 INFO L137 encePairwiseOnDemand]: 163/186 looper letters, 117 selfloop transitions, 34 changer transitions 5/278 dead transitions. [2022-11-02 20:13:49,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 278 transitions, 1678 flow [2022-11-02 20:13:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:13:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-02 20:13:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2013 transitions. [2022-11-02 20:13:49,551 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6764112903225806 [2022-11-02 20:13:49,551 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2013 transitions. [2022-11-02 20:13:49,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2013 transitions. [2022-11-02 20:13:49,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:49,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2013 transitions. [2022-11-02 20:13:49,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 125.8125) internal successors, (2013), 16 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:49,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:49,574 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:49,582 INFO L175 Difference]: Start difference. First operand has 204 places, 180 transitions, 606 flow. Second operand 16 states and 2013 transitions. [2022-11-02 20:13:49,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 278 transitions, 1678 flow [2022-11-02 20:13:49,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 278 transitions, 1576 flow, removed 51 selfloop flow, removed 5 redundant places. [2022-11-02 20:13:49,694 INFO L231 Difference]: Finished difference. Result has 222 places, 210 transitions, 1032 flow [2022-11-02 20:13:49,695 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1032, PETRI_PLACES=222, PETRI_TRANSITIONS=210} [2022-11-02 20:13:49,696 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 47 predicate places. [2022-11-02 20:13:49,696 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 210 transitions, 1032 flow [2022-11-02 20:13:49,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:49,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:49,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:49,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:49,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:49,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:13:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:49,905 INFO L85 PathProgramCache]: Analyzing trace with hash -910061551, now seen corresponding path program 4 times [2022-11-02 20:13:49,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:49,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186253459] [2022-11-02 20:13:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:49,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:13:50,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:50,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186253459] [2022-11-02 20:13:50,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186253459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:50,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:50,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:13:50,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357532478] [2022-11-02 20:13:50,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:50,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:13:50,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:13:50,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:13:50,643 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2022-11-02 20:13:50,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 210 transitions, 1032 flow. Second operand has 10 states, 10 states have (on average 121.8) internal successors, (1218), 10 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:50,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:50,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2022-11-02 20:13:50,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:53,091 INFO L130 PetriNetUnfolder]: 3612/7718 cut-off events. [2022-11-02 20:13:53,091 INFO L131 PetriNetUnfolder]: For 46979/47379 co-relation queries the response was YES. [2022-11-02 20:13:53,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37798 conditions, 7718 events. 3612/7718 cut-off events. For 46979/47379 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 66420 event pairs, 860 based on Foata normal form. 9/7547 useless extension candidates. Maximal degree in co-relation 37754. Up to 2586 conditions per place. [2022-11-02 20:13:53,199 INFO L137 encePairwiseOnDemand]: 172/186 looper letters, 162 selfloop transitions, 44 changer transitions 10/338 dead transitions. [2022-11-02 20:13:53,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 338 transitions, 2615 flow [2022-11-02 20:13:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:13:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-02 20:13:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2054 transitions. [2022-11-02 20:13:53,204 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6901881720430108 [2022-11-02 20:13:53,204 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2054 transitions. [2022-11-02 20:13:53,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2054 transitions. [2022-11-02 20:13:53,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:53,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2054 transitions. [2022-11-02 20:13:53,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 128.375) internal successors, (2054), 16 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:53,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:53,220 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:53,220 INFO L175 Difference]: Start difference. First operand has 222 places, 210 transitions, 1032 flow. Second operand 16 states and 2054 transitions. [2022-11-02 20:13:53,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 338 transitions, 2615 flow [2022-11-02 20:13:53,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 2383 flow, removed 112 selfloop flow, removed 7 redundant places. [2022-11-02 20:13:53,289 INFO L231 Difference]: Finished difference. Result has 235 places, 236 transitions, 1302 flow [2022-11-02 20:13:53,289 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1302, PETRI_PLACES=235, PETRI_TRANSITIONS=236} [2022-11-02 20:13:53,292 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 60 predicate places. [2022-11-02 20:13:53,293 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 236 transitions, 1302 flow [2022-11-02 20:13:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.8) internal successors, (1218), 10 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:53,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:53,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:53,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:13:53,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:13:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:53,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1663273165, now seen corresponding path program 5 times [2022-11-02 20:13:53,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:53,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494409470] [2022-11-02 20:13:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:53,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:55,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:55,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494409470] [2022-11-02 20:13:55,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494409470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:55,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058364579] [2022-11-02 20:13:55,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:13:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:55,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:55,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:55,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:13:55,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:13:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:13:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:56,164 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:56,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:13:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:13:56,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:56,510 INFO L356 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-11-02 20:13:56,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-11-02 20:13:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:13:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058364579] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:56,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:56,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27, 15] total 43 [2022-11-02 20:13:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926895561] [2022-11-02 20:13:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:13:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:13:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:13:56,753 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2022-11-02 20:13:56,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 236 transitions, 1302 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:56,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:56,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2022-11-02 20:13:56,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:00,427 INFO L130 PetriNetUnfolder]: 5178/11456 cut-off events. [2022-11-02 20:14:00,428 INFO L131 PetriNetUnfolder]: For 65728/65997 co-relation queries the response was YES. [2022-11-02 20:14:00,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56351 conditions, 11456 events. 5178/11456 cut-off events. For 65728/65997 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 109791 event pairs, 760 based on Foata normal form. 11/11280 useless extension candidates. Maximal degree in co-relation 56292. Up to 3845 conditions per place. [2022-11-02 20:14:00,633 INFO L137 encePairwiseOnDemand]: 172/186 looper letters, 207 selfloop transitions, 65 changer transitions 15/409 dead transitions. [2022-11-02 20:14:00,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 409 transitions, 3462 flow [2022-11-02 20:14:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:14:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 20:14:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2801 transitions. [2022-11-02 20:14:00,643 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6845063538611925 [2022-11-02 20:14:00,643 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2801 transitions. [2022-11-02 20:14:00,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2801 transitions. [2022-11-02 20:14:00,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:00,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2801 transitions. [2022-11-02 20:14:00,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 127.31818181818181) internal successors, (2801), 22 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:00,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:00,667 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:00,667 INFO L175 Difference]: Start difference. First operand has 235 places, 236 transitions, 1302 flow. Second operand 22 states and 2801 transitions. [2022-11-02 20:14:00,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 409 transitions, 3462 flow [2022-11-02 20:14:00,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 409 transitions, 3392 flow, removed 33 selfloop flow, removed 4 redundant places. [2022-11-02 20:14:00,867 INFO L231 Difference]: Finished difference. Result has 262 places, 265 transitions, 1877 flow [2022-11-02 20:14:00,868 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1877, PETRI_PLACES=262, PETRI_TRANSITIONS=265} [2022-11-02 20:14:00,871 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 87 predicate places. [2022-11-02 20:14:00,871 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 265 transitions, 1877 flow [2022-11-02 20:14:00,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:00,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:00,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:00,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:14:01,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1178406993, now seen corresponding path program 6 times [2022-11-02 20:14:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594348376] [2022-11-02 20:14:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:03,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594348376] [2022-11-02 20:14:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594348376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740988913] [2022-11-02 20:14:03,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:14:03,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:03,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:03,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:14:03,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-02 20:14:03,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:14:03,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:03,955 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:03,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:14:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:14:03,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:03,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740988913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:03,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:03,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 34 [2022-11-02 20:14:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411334395] [2022-11-02 20:14:03,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:03,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:14:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:14:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:14:03,993 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2022-11-02 20:14:03,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 265 transitions, 1877 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:03,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:03,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2022-11-02 20:14:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:07,491 INFO L130 PetriNetUnfolder]: 5420/12187 cut-off events. [2022-11-02 20:14:07,491 INFO L131 PetriNetUnfolder]: For 84291/84717 co-relation queries the response was YES. [2022-11-02 20:14:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62951 conditions, 12187 events. 5420/12187 cut-off events. For 84291/84717 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 119368 event pairs, 1209 based on Foata normal form. 11/11916 useless extension candidates. Maximal degree in co-relation 62881. Up to 6045 conditions per place. [2022-11-02 20:14:07,659 INFO L137 encePairwiseOnDemand]: 162/186 looper letters, 156 selfloop transitions, 68 changer transitions 9/355 dead transitions. [2022-11-02 20:14:07,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 355 transitions, 3177 flow [2022-11-02 20:14:07,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:14:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 20:14:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1895 transitions. [2022-11-02 20:14:07,666 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6792114695340502 [2022-11-02 20:14:07,666 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1895 transitions. [2022-11-02 20:14:07,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1895 transitions. [2022-11-02 20:14:07,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:07,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1895 transitions. [2022-11-02 20:14:07,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.33333333333333) internal successors, (1895), 15 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:07,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:07,677 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:07,677 INFO L175 Difference]: Start difference. First operand has 262 places, 265 transitions, 1877 flow. Second operand 15 states and 1895 transitions. [2022-11-02 20:14:07,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 355 transitions, 3177 flow [2022-11-02 20:14:07,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 355 transitions, 3034 flow, removed 64 selfloop flow, removed 5 redundant places. [2022-11-02 20:14:07,992 INFO L231 Difference]: Finished difference. Result has 275 places, 293 transitions, 2342 flow [2022-11-02 20:14:07,993 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2342, PETRI_PLACES=275, PETRI_TRANSITIONS=293} [2022-11-02 20:14:07,993 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 100 predicate places. [2022-11-02 20:14:07,994 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 293 transitions, 2342 flow [2022-11-02 20:14:07,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:07,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:07,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:08,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:08,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:14:08,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1028362323, now seen corresponding path program 7 times [2022-11-02 20:14:08,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:08,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174275260] [2022-11-02 20:14:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:08,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:11,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174275260] [2022-11-02 20:14:11,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174275260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:11,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18072471] [2022-11-02 20:14:11,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:14:11,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:11,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:11,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:11,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:14:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-02 20:14:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:13,544 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:13,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2022-11-02 20:14:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:13,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:14,105 INFO L356 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-11-02 20:14:14,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 90 [2022-11-02 20:14:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:14:14,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18072471] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:14,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:14:14,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [31, 31] total 60 [2022-11-02 20:14:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786869525] [2022-11-02 20:14:14,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:14,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:14:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:14:14,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=3199, Unknown=0, NotChecked=0, Total=3540 [2022-11-02 20:14:14,847 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 186 [2022-11-02 20:14:14,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 293 transitions, 2342 flow. Second operand has 18 states, 18 states have (on average 116.38888888888889) internal successors, (2095), 18 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:14,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:14,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 186 [2022-11-02 20:14:14,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:19,202 INFO L130 PetriNetUnfolder]: 5538/12716 cut-off events. [2022-11-02 20:14:19,202 INFO L131 PetriNetUnfolder]: For 119212/120025 co-relation queries the response was YES. [2022-11-02 20:14:19,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73150 conditions, 12716 events. 5538/12716 cut-off events. For 119212/120025 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 126285 event pairs, 1883 based on Foata normal form. 96/12594 useless extension candidates. Maximal degree in co-relation 73065. Up to 6272 conditions per place. [2022-11-02 20:14:19,385 INFO L137 encePairwiseOnDemand]: 165/186 looper letters, 209 selfloop transitions, 81 changer transitions 13/422 dead transitions. [2022-11-02 20:14:19,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 422 transitions, 4473 flow [2022-11-02 20:14:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:14:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 20:14:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2103 transitions. [2022-11-02 20:14:19,390 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6650853889943074 [2022-11-02 20:14:19,390 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2103 transitions. [2022-11-02 20:14:19,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2103 transitions. [2022-11-02 20:14:19,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:19,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2103 transitions. [2022-11-02 20:14:19,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 123.70588235294117) internal successors, (2103), 17 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,401 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,402 INFO L175 Difference]: Start difference. First operand has 275 places, 293 transitions, 2342 flow. Second operand 17 states and 2103 transitions. [2022-11-02 20:14:19,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 422 transitions, 4473 flow [2022-11-02 20:14:19,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 422 transitions, 4166 flow, removed 118 selfloop flow, removed 9 redundant places. [2022-11-02 20:14:19,757 INFO L231 Difference]: Finished difference. Result has 287 places, 325 transitions, 2980 flow [2022-11-02 20:14:19,758 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2980, PETRI_PLACES=287, PETRI_TRANSITIONS=325} [2022-11-02 20:14:19,760 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 112 predicate places. [2022-11-02 20:14:19,760 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 325 transitions, 2980 flow [2022-11-02 20:14:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.38888888888889) internal successors, (2095), 18 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:19,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:19,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:19,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:19,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:19,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash -150771231, now seen corresponding path program 8 times [2022-11-02 20:14:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:19,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618835666] [2022-11-02 20:14:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:22,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618835666] [2022-11-02 20:14:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618835666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050023744] [2022-11-02 20:14:22,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:14:22,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:22,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:22,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:14:22,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:14:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:22,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:14:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:23,214 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:23,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:14:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:14:23,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:23,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050023744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:23,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:23,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 35 [2022-11-02 20:14:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663257132] [2022-11-02 20:14:23,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:23,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:14:23,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:14:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:14:23,262 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2022-11-02 20:14:23,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 325 transitions, 2980 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:23,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:23,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2022-11-02 20:14:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:27,152 INFO L130 PetriNetUnfolder]: 5751/13077 cut-off events. [2022-11-02 20:14:27,152 INFO L131 PetriNetUnfolder]: For 139547/140192 co-relation queries the response was YES. [2022-11-02 20:14:27,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79625 conditions, 13077 events. 5751/13077 cut-off events. For 139547/140192 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 130334 event pairs, 2073 based on Foata normal form. 43/12820 useless extension candidates. Maximal degree in co-relation 79534. Up to 5859 conditions per place. [2022-11-02 20:14:27,380 INFO L137 encePairwiseOnDemand]: 169/186 looper letters, 192 selfloop transitions, 96 changer transitions 11/421 dead transitions. [2022-11-02 20:14:27,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 4760 flow [2022-11-02 20:14:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:14:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 20:14:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2140 transitions. [2022-11-02 20:14:27,386 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.676786843769766 [2022-11-02 20:14:27,387 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2140 transitions. [2022-11-02 20:14:27,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2140 transitions. [2022-11-02 20:14:27,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:27,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2140 transitions. [2022-11-02 20:14:27,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 125.88235294117646) internal successors, (2140), 17 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:27,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:27,400 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:27,400 INFO L175 Difference]: Start difference. First operand has 287 places, 325 transitions, 2980 flow. Second operand 17 states and 2140 transitions. [2022-11-02 20:14:27,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 4760 flow [2022-11-02 20:14:27,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 421 transitions, 4540 flow, removed 83 selfloop flow, removed 8 redundant places. [2022-11-02 20:14:27,976 INFO L231 Difference]: Finished difference. Result has 297 places, 336 transitions, 3249 flow [2022-11-02 20:14:27,977 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3249, PETRI_PLACES=297, PETRI_TRANSITIONS=336} [2022-11-02 20:14:27,977 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 122 predicate places. [2022-11-02 20:14:27,978 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 336 transitions, 3249 flow [2022-11-02 20:14:27,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:27,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:27,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:27,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:28,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -278483497, now seen corresponding path program 9 times [2022-11-02 20:14:28,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128641078] [2022-11-02 20:14:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:28,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128641078] [2022-11-02 20:14:34,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128641078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872394421] [2022-11-02 20:14:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:14:34,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:34,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:34,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:14:34,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-02 20:14:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:14:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:35,411 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:35,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:14:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:14:35,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:14:35,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872394421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:35,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:14:35,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [39] total 47 [2022-11-02 20:14:35,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064839005] [2022-11-02 20:14:35,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:35,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:14:35,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:14:35,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2026, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:14:35,432 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 186 [2022-11-02 20:14:35,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 336 transitions, 3249 flow. Second operand has 13 states, 13 states have (on average 115.84615384615384) internal successors, (1506), 13 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:35,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:35,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 186 [2022-11-02 20:14:35,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:41,295 INFO L130 PetriNetUnfolder]: 8535/18159 cut-off events. [2022-11-02 20:14:41,295 INFO L131 PetriNetUnfolder]: For 208104/208847 co-relation queries the response was YES. [2022-11-02 20:14:41,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109956 conditions, 18159 events. 8535/18159 cut-off events. For 208104/208847 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 179733 event pairs, 2289 based on Foata normal form. 132/18020 useless extension candidates. Maximal degree in co-relation 109862. Up to 8694 conditions per place. [2022-11-02 20:14:41,574 INFO L137 encePairwiseOnDemand]: 167/186 looper letters, 220 selfloop transitions, 117 changer transitions 24/472 dead transitions. [2022-11-02 20:14:41,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 472 transitions, 5423 flow [2022-11-02 20:14:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:14:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-02 20:14:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2302 transitions. [2022-11-02 20:14:41,578 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6513865308432372 [2022-11-02 20:14:41,579 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2302 transitions. [2022-11-02 20:14:41,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2302 transitions. [2022-11-02 20:14:41,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:41,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2302 transitions. [2022-11-02 20:14:41,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 121.15789473684211) internal successors, (2302), 19 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:41,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:41,592 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:41,593 INFO L175 Difference]: Start difference. First operand has 297 places, 336 transitions, 3249 flow. Second operand 19 states and 2302 transitions. [2022-11-02 20:14:41,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 472 transitions, 5423 flow [2022-11-02 20:14:42,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 472 transitions, 5304 flow, removed 20 selfloop flow, removed 11 redundant places. [2022-11-02 20:14:42,373 INFO L231 Difference]: Finished difference. Result has 310 places, 355 transitions, 3825 flow [2022-11-02 20:14:42,374 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3825, PETRI_PLACES=310, PETRI_TRANSITIONS=355} [2022-11-02 20:14:42,374 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 135 predicate places. [2022-11-02 20:14:42,374 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 355 transitions, 3825 flow [2022-11-02 20:14:42,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.84615384615384) internal successors, (1506), 13 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:42,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:42,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:42,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:14:42,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:42,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:42,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2105426727, now seen corresponding path program 10 times [2022-11-02 20:14:42,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783947221] [2022-11-02 20:14:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:42,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:14:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:42,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783947221] [2022-11-02 20:14:42,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783947221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:14:42,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:14:42,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:14:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475269539] [2022-11-02 20:14:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:42,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:14:42,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:14:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:14:42,712 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 186 [2022-11-02 20:14:42,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 355 transitions, 3825 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:42,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:42,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 186 [2022-11-02 20:14:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:14:47,150 INFO L130 PetriNetUnfolder]: 5227/13052 cut-off events. [2022-11-02 20:14:47,150 INFO L131 PetriNetUnfolder]: For 178785/183050 co-relation queries the response was YES. [2022-11-02 20:14:47,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81878 conditions, 13052 events. 5227/13052 cut-off events. For 178785/183050 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 138066 event pairs, 2705 based on Foata normal form. 174/12363 useless extension candidates. Maximal degree in co-relation 81777. Up to 7024 conditions per place. [2022-11-02 20:14:47,371 INFO L137 encePairwiseOnDemand]: 183/186 looper letters, 177 selfloop transitions, 2 changer transitions 0/379 dead transitions. [2022-11-02 20:14:47,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 379 transitions, 4599 flow [2022-11-02 20:14:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:14:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:14:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-11-02 20:14:47,373 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9032258064516129 [2022-11-02 20:14:47,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-11-02 20:14:47,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-11-02 20:14:47,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:14:47,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-11-02 20:14:47,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:47,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:47,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:47,375 INFO L175 Difference]: Start difference. First operand has 310 places, 355 transitions, 3825 flow. Second operand 3 states and 504 transitions. [2022-11-02 20:14:47,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 379 transitions, 4599 flow [2022-11-02 20:14:47,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 379 transitions, 4438 flow, removed 6 selfloop flow, removed 15 redundant places. [2022-11-02 20:14:47,894 INFO L231 Difference]: Finished difference. Result has 294 places, 354 transitions, 3680 flow [2022-11-02 20:14:47,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3680, PETRI_PLACES=294, PETRI_TRANSITIONS=354} [2022-11-02 20:14:47,895 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 119 predicate places. [2022-11-02 20:14:47,896 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 354 transitions, 3680 flow [2022-11-02 20:14:47,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:47,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:14:47,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:14:47,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:14:47,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:14:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:14:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1514036605, now seen corresponding path program 11 times [2022-11-02 20:14:47,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:14:47,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757527840] [2022-11-02 20:14:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:14:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:14:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:14:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:14:54,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:14:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757527840] [2022-11-02 20:14:54,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757527840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897186634] [2022-11-02 20:14:54,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:14:54,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:14:54,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:14:54,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:14:54,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:14:54,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 20:14:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:14:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:14:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:14:55,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:55,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:14:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:14:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:55,761 INFO L356 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-11-02 20:14:55,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-11-02 20:14:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:14:56,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897186634] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:14:56,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:14:56,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [39, 15] total 55 [2022-11-02 20:14:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195553247] [2022-11-02 20:14:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:14:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:14:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:14:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2769, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 20:14:56,069 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2022-11-02 20:14:56,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 354 transitions, 3680 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:14:56,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:14:56,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2022-11-02 20:14:56,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:15:02,070 INFO L130 PetriNetUnfolder]: 6340/15097 cut-off events. [2022-11-02 20:15:02,070 INFO L131 PetriNetUnfolder]: For 176620/177907 co-relation queries the response was YES. [2022-11-02 20:15:02,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92853 conditions, 15097 events. 6340/15097 cut-off events. For 176620/177907 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 158355 event pairs, 1288 based on Foata normal form. 89/14854 useless extension candidates. Maximal degree in co-relation 92663. Up to 5779 conditions per place. [2022-11-02 20:15:02,312 INFO L137 encePairwiseOnDemand]: 172/186 looper letters, 215 selfloop transitions, 84 changer transitions 66/495 dead transitions. [2022-11-02 20:15:02,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 495 transitions, 6001 flow [2022-11-02 20:15:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:15:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:15:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2667 transitions. [2022-11-02 20:15:02,318 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6827956989247311 [2022-11-02 20:15:02,319 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2667 transitions. [2022-11-02 20:15:02,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2667 transitions. [2022-11-02 20:15:02,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:15:02,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2667 transitions. [2022-11-02 20:15:02,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 127.0) internal successors, (2667), 21 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:02,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:02,332 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 186.0) internal successors, (4092), 22 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:02,332 INFO L175 Difference]: Start difference. First operand has 294 places, 354 transitions, 3680 flow. Second operand 21 states and 2667 transitions. [2022-11-02 20:15:02,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 495 transitions, 6001 flow [2022-11-02 20:15:02,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 495 transitions, 5997 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:15:02,902 INFO L231 Difference]: Finished difference. Result has 316 places, 322 transitions, 3351 flow [2022-11-02 20:15:02,902 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3351, PETRI_PLACES=316, PETRI_TRANSITIONS=322} [2022-11-02 20:15:02,903 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 141 predicate places. [2022-11-02 20:15:02,903 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 322 transitions, 3351 flow [2022-11-02 20:15:02,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:02,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:15:02,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:02,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:15:03,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:15:03,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:15:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash 233739715, now seen corresponding path program 12 times [2022-11-02 20:15:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:03,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324526024] [2022-11-02 20:15:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:03,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:15:05,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324526024] [2022-11-02 20:15:05,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324526024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115920660] [2022-11-02 20:15:05,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:15:05,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:05,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:05,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:05,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:15:05,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-02 20:15:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:15:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:15:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:05,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:15:05,640 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:15:05,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:15:06,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:15:06,479 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:15:06,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:15:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:15:06,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:15:06,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115920660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:15:06,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:15:06,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [30] total 44 [2022-11-02 20:15:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382704423] [2022-11-02 20:15:06,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:06,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:15:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:15:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1759, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:15:06,514 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2022-11-02 20:15:06,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 322 transitions, 3351 flow. Second operand has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:06,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:15:06,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2022-11-02 20:15:06,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:15:13,010 INFO L130 PetriNetUnfolder]: 7288/17248 cut-off events. [2022-11-02 20:15:13,010 INFO L131 PetriNetUnfolder]: For 225575/226675 co-relation queries the response was YES. [2022-11-02 20:15:13,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109705 conditions, 17248 events. 7288/17248 cut-off events. For 225575/226675 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 182995 event pairs, 1080 based on Foata normal form. 200/17120 useless extension candidates. Maximal degree in co-relation 109584. Up to 5515 conditions per place. [2022-11-02 20:15:13,635 INFO L137 encePairwiseOnDemand]: 152/186 looper letters, 243 selfloop transitions, 152 changer transitions 15/525 dead transitions. [2022-11-02 20:15:13,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 525 transitions, 7392 flow [2022-11-02 20:15:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:15:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-02 20:15:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2725 transitions. [2022-11-02 20:15:13,641 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5634822167080231 [2022-11-02 20:15:13,641 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2725 transitions. [2022-11-02 20:15:13,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2725 transitions. [2022-11-02 20:15:13,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:15:13,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2725 transitions. [2022-11-02 20:15:13,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 104.8076923076923) internal successors, (2725), 26 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:13,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 186.0) internal successors, (5022), 27 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:13,655 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 186.0) internal successors, (5022), 27 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:13,656 INFO L175 Difference]: Start difference. First operand has 316 places, 322 transitions, 3351 flow. Second operand 26 states and 2725 transitions. [2022-11-02 20:15:13,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 525 transitions, 7392 flow [2022-11-02 20:15:14,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 525 transitions, 6473 flow, removed 136 selfloop flow, removed 28 redundant places. [2022-11-02 20:15:14,466 INFO L231 Difference]: Finished difference. Result has 314 places, 421 transitions, 5215 flow [2022-11-02 20:15:14,466 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5215, PETRI_PLACES=314, PETRI_TRANSITIONS=421} [2022-11-02 20:15:14,467 INFO L287 CegarLoopForPetriNet]: 175 programPoint places, 139 predicate places. [2022-11-02 20:15:14,467 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 421 transitions, 5215 flow [2022-11-02 20:15:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:14,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:15:14,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:15:14,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:15:14,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:15:14,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 20:15:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:15:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1503895011, now seen corresponding path program 13 times [2022-11-02 20:15:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:15:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625525661] [2022-11-02 20:15:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:15:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:15:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:15:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:15:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625525661] [2022-11-02 20:15:16,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625525661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277887491] [2022-11-02 20:15:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:15:16,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:15:16,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:15:16,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:15:16,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e81bfa9a-541a-4f97-8dc2-4749c2350ab7/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:15:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:15:17,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:15:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:15:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:15:17,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:15:18,252 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:15:18,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 20:15:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:15:18,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:15:18,532 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_432) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* c_~i~0 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* c_~j~0 4))) 4) c_~f~0.offset))))) is different from false [2022-11-02 20:15:18,619 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:15:18,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2022-11-02 20:15:18,648 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:15:18,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 56 [2022-11-02 20:15:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:15:19,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277887491] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:15:19,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:15:19,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [29, 22] total 60 [2022-11-02 20:15:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393631363] [2022-11-02 20:15:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:15:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:15:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:15:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:15:19,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3225, Unknown=1, NotChecked=114, Total=3540 [2022-11-02 20:15:19,638 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 186 [2022-11-02 20:15:19,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 421 transitions, 5215 flow. Second operand has 20 states, 20 states have (on average 104.55) internal successors, (2091), 20 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:15:19,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:15:19,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 186 [2022-11-02 20:15:19,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand