./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8 --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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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-e04fb08 [2022-11-16 12:52:06,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:52:06,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:52:06,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:52:06,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:52:06,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:52:06,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:52:06,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:52:06,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:52:06,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:52:06,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:52:06,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:52:06,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:52:06,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:52:06,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:52:06,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:52:06,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:52:06,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:52:06,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:52:06,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:52:06,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:52:06,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:52:06,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:52:06,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:52:06,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:52:06,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:52:06,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:52:06,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:52:06,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:52:06,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:52:06,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:52:06,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:52:06,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:52:06,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:52:06,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:52:06,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:52:06,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:52:06,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:52:06,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:52:06,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:52:06,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:52:06,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:52:06,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:52:06,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:52:06,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:52:06,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:52:06,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:52:06,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:52:06,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:52:06,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:52:06,512 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:52:06,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:52:06,514 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:52:06,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:52:06,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:52:06,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:52:06,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:52:06,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:52:06,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:52:06,516 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:52:06,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:52:06,516 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:52:06,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:52:06,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:52:06,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:52:06,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:52:06,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:06,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:52:06,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:52:06,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:52:06,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:52:06,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:52:06,520 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:52:06,520 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:52:06,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:52:06,521 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_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-11-16 12:52:06,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:52:06,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:52:06,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:52:06,806 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:52:06,807 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:52:06,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-16 12:52:06,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/data/4cd5ca8a2/7546d4204b7d4c4dac3d02a68515c4c4/FLAGe3f4d1b91 [2022-11-16 12:52:07,304 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:52:07,304 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-16 12:52:07,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/data/4cd5ca8a2/7546d4204b7d4c4dac3d02a68515c4c4/FLAGe3f4d1b91 [2022-11-16 12:52:07,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/data/4cd5ca8a2/7546d4204b7d4c4dac3d02a68515c4c4 [2022-11-16 12:52:07,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:52:07,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:52:07,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:07,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:52:07,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:52:07,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:07" (1/1) ... [2022-11-16 12:52:07,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c34c543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:07, skipping insertion in model container [2022-11-16 12:52:07,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:07" (1/1) ... [2022-11-16 12:52:07,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:52:07,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:52:07,990 WARN L229 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_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-16 12:52:08,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:08,013 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:52:08,064 WARN L229 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_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-16 12:52:08,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:08,083 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:52:08,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08 WrapperNode [2022-11-16 12:52:08,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:08,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:08,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:52:08,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:52:08,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,162 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-11-16 12:52:08,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:08,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:52:08,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:52:08,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:52:08,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:52:08,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:52:08,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:52:08,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:52:08,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (1/1) ... [2022-11-16 12:52:08,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:08,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:52:08,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:52:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:52:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:52:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:52:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:52:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:52:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:52:08,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:52:08,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:52:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:52:08,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:52:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:52:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:52:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:52:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:52:08,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:52:08,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:52:08,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:52:08,321 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:52:08,437 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:52:08,439 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:52:08,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:52:09,094 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:52:09,095 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 12:52:09,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:09 BoogieIcfgContainer [2022-11-16 12:52:09,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:52:09,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:52:09,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:52:09,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:52:09,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:52:07" (1/3) ... [2022-11-16 12:52:09,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ae1674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:09, skipping insertion in model container [2022-11-16 12:52:09,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:08" (2/3) ... [2022-11-16 12:52:09,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ae1674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:09, skipping insertion in model container [2022-11-16 12:52:09,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:09" (3/3) ... [2022-11-16 12:52:09,109 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-11-16 12:52:09,117 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:52:09,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:52:09,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:52:09,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:52:09,261 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:52:09,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-11-16 12:52:09,413 INFO L130 PetriNetUnfolder]: 18/208 cut-off events. [2022-11-16 12:52:09,414 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:52:09,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 110 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-11-16 12:52:09,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-11-16 12:52:09,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-11-16 12:52:09,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:52:09,445 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;@703f2d06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:52:09,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 12:52:09,502 INFO L130 PetriNetUnfolder]: 18/196 cut-off events. [2022-11-16 12:52:09,502 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:52:09,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:09,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:09,505 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)] === [2022-11-16 12:52:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash 541264758, now seen corresponding path program 1 times [2022-11-16 12:52:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203845245] [2022-11-16 12:52:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:09,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:09,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203845245] [2022-11-16 12:52:09,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203845245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:09,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:09,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:09,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678771583] [2022-11-16 12:52:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:52:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:52:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:52:10,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-11-16 12:52:10,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:10,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-11-16 12:52:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:10,228 INFO L130 PetriNetUnfolder]: 71/370 cut-off events. [2022-11-16 12:52:10,228 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-16 12:52:10,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1046 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-11-16 12:52:10,238 INFO L137 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-11-16 12:52:10,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-11-16 12:52:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:52:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:52:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-11-16 12:52:10,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-11-16 12:52:10,264 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-11-16 12:52:10,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-11-16 12:52:10,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:10,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-11-16 12:52:10,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,286 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,288 INFO L175 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-11-16 12:52:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-11-16 12:52:10,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 12:52:10,301 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-11-16 12:52:10,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-11-16 12:52:10,312 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-11-16 12:52:10,313 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-11-16 12:52:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:10,314 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:10,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:52:10,315 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)] === [2022-11-16 12:52:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1157471343, now seen corresponding path program 1 times [2022-11-16 12:52:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098667246] [2022-11-16 12:52:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:10,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098667246] [2022-11-16 12:52:10,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098667246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:10,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:10,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:52:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678235523] [2022-11-16 12:52:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:52:10,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:52:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:52:10,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-11-16 12:52:10,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:10,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:10,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-11-16 12:52:10,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:11,300 INFO L130 PetriNetUnfolder]: 73/448 cut-off events. [2022-11-16 12:52:11,300 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-16 12:52:11,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 448 events. 73/448 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1284 event pairs, 38 based on Foata normal form. 11/424 useless extension candidates. Maximal degree in co-relation 616. Up to 118 conditions per place. [2022-11-16 12:52:11,304 INFO L137 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-11-16 12:52:11,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-11-16 12:52:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:52:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:52:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-11-16 12:52:11,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-11-16 12:52:11,310 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-11-16 12:52:11,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-11-16 12:52:11,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:11,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-11-16 12:52:11,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,323 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,323 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-11-16 12:52:11,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-11-16 12:52:11,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:11,332 INFO L231 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-11-16 12:52:11,332 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-11-16 12:52:11,333 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-16 12:52:11,334 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-11-16 12:52:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:11,335 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:11,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:52:11,336 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)] === [2022-11-16 12:52:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1233715173, now seen corresponding path program 1 times [2022-11-16 12:52:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503476216] [2022-11-16 12:52:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:11,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:11,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:11,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503476216] [2022-11-16 12:52:11,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503476216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:11,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:11,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:52:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316200451] [2022-11-16 12:52:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:11,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:52:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:52:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:52:11,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-11-16 12:52:11,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:11,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:11,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-11-16 12:52:11,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:11,998 INFO L130 PetriNetUnfolder]: 92/476 cut-off events. [2022-11-16 12:52:11,998 INFO L131 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-11-16 12:52:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 476 events. 92/476 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1566 event pairs, 50 based on Foata normal form. 15/449 useless extension candidates. Maximal degree in co-relation 772. Up to 115 conditions per place. [2022-11-16 12:52:12,003 INFO L137 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-11-16 12:52:12,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-11-16 12:52:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-11-16 12:52:12,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-11-16 12:52:12,008 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-11-16 12:52:12,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-11-16 12:52:12,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:12,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-11-16 12:52:12,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,017 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,017 INFO L175 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-11-16 12:52:12,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-11-16 12:52:12,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:52:12,026 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-11-16 12:52:12,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-11-16 12:52:12,029 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-11-16 12:52:12,030 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-11-16 12:52:12,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:12,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:52:12,031 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)] === [2022-11-16 12:52:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1170939260, now seen corresponding path program 1 times [2022-11-16 12:52:12,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:12,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275162593] [2022-11-16 12:52:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:12,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:52:12,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:12,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275162593] [2022-11-16 12:52:12,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275162593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:12,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776459535] [2022-11-16 12:52:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:12,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:12,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:12,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:12,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-16 12:52:12,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:12,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-16 12:52:12,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:12,585 INFO L130 PetriNetUnfolder]: 82/405 cut-off events. [2022-11-16 12:52:12,585 INFO L131 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2022-11-16 12:52:12,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1143 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2022-11-16 12:52:12,590 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2022-11-16 12:52:12,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2022-11-16 12:52:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2022-11-16 12:52:12,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2022-11-16 12:52:12,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2022-11-16 12:52:12,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2022-11-16 12:52:12,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:12,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2022-11-16 12:52:12,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,603 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2022-11-16 12:52:12,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2022-11-16 12:52:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:52:12,611 INFO L231 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2022-11-16 12:52:12,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2022-11-16 12:52:12,618 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2022-11-16 12:52:12,618 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2022-11-16 12:52:12,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:12,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:12,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:52:12,620 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)] === [2022-11-16 12:52:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1731428024, now seen corresponding path program 2 times [2022-11-16 12:52:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597626438] [2022-11-16 12:52:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:12,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:52:13,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597626438] [2022-11-16 12:52:13,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597626438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:13,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:13,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:52:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080408303] [2022-11-16 12:52:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:13,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-16 12:52:13,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:13,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-16 12:52:13,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:13,120 INFO L130 PetriNetUnfolder]: 58/347 cut-off events. [2022-11-16 12:52:13,120 INFO L131 PetriNetUnfolder]: For 88/96 co-relation queries the response was YES. [2022-11-16 12:52:13,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 347 events. 58/347 cut-off events. For 88/96 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 810 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 564. Up to 91 conditions per place. [2022-11-16 12:52:13,122 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 17 selfloop transitions, 3 changer transitions 0/185 dead transitions. [2022-11-16 12:52:13,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 185 transitions, 462 flow [2022-11-16 12:52:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-11-16 12:52:13,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8941548183254344 [2022-11-16 12:52:13,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-11-16 12:52:13,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-11-16 12:52:13,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:13,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-11-16 12:52:13,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,129 INFO L175 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 3 states and 566 transitions. [2022-11-16 12:52:13,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 185 transitions, 462 flow [2022-11-16 12:52:13,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 454 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-16 12:52:13,134 INFO L231 Difference]: Finished difference. Result has 188 places, 183 transitions, 423 flow [2022-11-16 12:52:13,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2022-11-16 12:52:13,137 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-16 12:52:13,137 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 423 flow [2022-11-16 12:52:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:13,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:52:13,138 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)] === [2022-11-16 12:52:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash -89286756, now seen corresponding path program 3 times [2022-11-16 12:52:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945874474] [2022-11-16 12:52:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:52:13,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:13,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945874474] [2022-11-16 12:52:13,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945874474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:13,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:13,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 12:52:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33284417] [2022-11-16 12:52:13,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:52:13,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:52:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:52:13,990 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2022-11-16 12:52:13,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:13,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:13,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2022-11-16 12:52:13,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:14,504 INFO L130 PetriNetUnfolder]: 426/1115 cut-off events. [2022-11-16 12:52:14,505 INFO L131 PetriNetUnfolder]: For 591/603 co-relation queries the response was YES. [2022-11-16 12:52:14,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2378 conditions, 1115 events. 426/1115 cut-off events. For 591/603 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6142 event pairs, 103 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2369. Up to 291 conditions per place. [2022-11-16 12:52:14,515 INFO L137 encePairwiseOnDemand]: 196/211 looper letters, 77 selfloop transitions, 13 changer transitions 9/232 dead transitions. [2022-11-16 12:52:14,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 782 flow [2022-11-16 12:52:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:52:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 12:52:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1969 transitions. [2022-11-16 12:52:14,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7178271965001822 [2022-11-16 12:52:14,521 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1969 transitions. [2022-11-16 12:52:14,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1969 transitions. [2022-11-16 12:52:14,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:14,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1969 transitions. [2022-11-16 12:52:14,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 151.46153846153845) internal successors, (1969), 13 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,534 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,534 INFO L175 Difference]: Start difference. First operand has 188 places, 183 transitions, 423 flow. Second operand 13 states and 1969 transitions. [2022-11-16 12:52:14,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 782 flow [2022-11-16 12:52:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 232 transitions, 775 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:14,540 INFO L231 Difference]: Finished difference. Result has 204 places, 189 transitions, 478 flow [2022-11-16 12:52:14,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=478, PETRI_PLACES=204, PETRI_TRANSITIONS=189} [2022-11-16 12:52:14,541 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 15 predicate places. [2022-11-16 12:52:14,542 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 189 transitions, 478 flow [2022-11-16 12:52:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:14,543 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:52:14,543 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)] === [2022-11-16 12:52:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1742407762, now seen corresponding path program 1 times [2022-11-16 12:52:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:14,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103794036] [2022-11-16 12:52:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:52:14,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103794036] [2022-11-16 12:52:14,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103794036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:14,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:14,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:52:14,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537198534] [2022-11-16 12:52:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:14,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:52:14,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-16 12:52:14,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 189 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:14,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:14,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-16 12:52:14,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:15,087 INFO L130 PetriNetUnfolder]: 191/844 cut-off events. [2022-11-16 12:52:15,087 INFO L131 PetriNetUnfolder]: For 519/559 co-relation queries the response was YES. [2022-11-16 12:52:15,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 844 events. 191/844 cut-off events. For 519/559 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4631 event pairs, 41 based on Foata normal form. 20/822 useless extension candidates. Maximal degree in co-relation 1696. Up to 132 conditions per place. [2022-11-16 12:52:15,096 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 31 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2022-11-16 12:52:15,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 207 transitions, 633 flow [2022-11-16 12:52:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2022-11-16 12:52:15,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9016587677725119 [2022-11-16 12:52:15,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2022-11-16 12:52:15,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2022-11-16 12:52:15,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:15,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2022-11-16 12:52:15,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,105 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,105 INFO L175 Difference]: Start difference. First operand has 204 places, 189 transitions, 478 flow. Second operand 4 states and 761 transitions. [2022-11-16 12:52:15,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 207 transitions, 633 flow [2022-11-16 12:52:15,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 207 transitions, 617 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-16 12:52:15,113 INFO L231 Difference]: Finished difference. Result has 199 places, 193 transitions, 515 flow [2022-11-16 12:52:15,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=515, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2022-11-16 12:52:15,115 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 10 predicate places. [2022-11-16 12:52:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 515 flow [2022-11-16 12:52:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:15,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:15,116 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:52:15,117 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)] === [2022-11-16 12:52:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1460393981, now seen corresponding path program 1 times [2022-11-16 12:52:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002125104] [2022-11-16 12:52:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:15,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002125104] [2022-11-16 12:52:15,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002125104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:15,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924373796] [2022-11-16 12:52:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:15,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:15,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:52:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:52:15,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:16,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:16,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924373796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:16,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:16,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 12:52:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50433102] [2022-11-16 12:52:16,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:52:16,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:52:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:52:16,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-11-16 12:52:16,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 515 flow. Second operand has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:16,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:16,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-11-16 12:52:16,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:17,300 INFO L130 PetriNetUnfolder]: 288/1435 cut-off events. [2022-11-16 12:52:17,302 INFO L131 PetriNetUnfolder]: For 1656/1756 co-relation queries the response was YES. [2022-11-16 12:52:17,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 1435 events. 288/1435 cut-off events. For 1656/1756 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9702 event pairs, 149 based on Foata normal form. 64/1434 useless extension candidates. Maximal degree in co-relation 3176. Up to 323 conditions per place. [2022-11-16 12:52:17,316 INFO L137 encePairwiseOnDemand]: 195/211 looper letters, 69 selfloop transitions, 23 changer transitions 1/235 dead transitions. [2022-11-16 12:52:17,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 235 transitions, 868 flow [2022-11-16 12:52:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:52:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 12:52:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2731 transitions. [2022-11-16 12:52:17,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7613604683579593 [2022-11-16 12:52:17,323 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2731 transitions. [2022-11-16 12:52:17,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2731 transitions. [2022-11-16 12:52:17,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:17,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2731 transitions. [2022-11-16 12:52:17,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.64705882352942) internal successors, (2731), 17 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:17,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:17,342 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:17,342 INFO L175 Difference]: Start difference. First operand has 199 places, 193 transitions, 515 flow. Second operand 17 states and 2731 transitions. [2022-11-16 12:52:17,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 235 transitions, 868 flow [2022-11-16 12:52:17,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 235 transitions, 856 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:17,357 INFO L231 Difference]: Finished difference. Result has 221 places, 204 transitions, 622 flow [2022-11-16 12:52:17,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=622, PETRI_PLACES=221, PETRI_TRANSITIONS=204} [2022-11-16 12:52:17,359 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 32 predicate places. [2022-11-16 12:52:17,360 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 204 transitions, 622 flow [2022-11-16 12:52:17,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:17,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:17,361 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:17,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:52:17,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:52:17,567 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)] === [2022-11-16 12:52:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:17,568 INFO L85 PathProgramCache]: Analyzing trace with hash 938924545, now seen corresponding path program 1 times [2022-11-16 12:52:17,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648078124] [2022-11-16 12:52:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:17,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:52:18,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:18,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648078124] [2022-11-16 12:52:18,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648078124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:18,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171866225] [2022-11-16 12:52:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:18,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:18,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:18,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:18,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:52:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:52:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:52:18,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:52:18,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171866225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:18,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:18,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 12:52:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498700832] [2022-11-16 12:52:18,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:52:18,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:52:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:52:18,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2022-11-16 12:52:18,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 204 transitions, 622 flow. Second operand has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:18,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:18,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2022-11-16 12:52:18,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:19,605 INFO L130 PetriNetUnfolder]: 329/1728 cut-off events. [2022-11-16 12:52:19,605 INFO L131 PetriNetUnfolder]: For 1761/1846 co-relation queries the response was YES. [2022-11-16 12:52:19,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3810 conditions, 1728 events. 329/1728 cut-off events. For 1761/1846 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12432 event pairs, 183 based on Foata normal form. 37/1680 useless extension candidates. Maximal degree in co-relation 3789. Up to 439 conditions per place. [2022-11-16 12:52:19,620 INFO L137 encePairwiseOnDemand]: 197/211 looper letters, 67 selfloop transitions, 24 changer transitions 2/235 dead transitions. [2022-11-16 12:52:19,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 235 transitions, 957 flow [2022-11-16 12:52:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:52:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:52:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2252 transitions. [2022-11-16 12:52:19,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7623561272850372 [2022-11-16 12:52:19,625 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2252 transitions. [2022-11-16 12:52:19,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2252 transitions. [2022-11-16 12:52:19,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:19,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2252 transitions. [2022-11-16 12:52:19,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.85714285714286) internal successors, (2252), 14 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:19,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:19,652 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:19,652 INFO L175 Difference]: Start difference. First operand has 221 places, 204 transitions, 622 flow. Second operand 14 states and 2252 transitions. [2022-11-16 12:52:19,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 235 transitions, 957 flow [2022-11-16 12:52:19,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 235 transitions, 931 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-16 12:52:19,661 INFO L231 Difference]: Finished difference. Result has 236 places, 212 transitions, 727 flow [2022-11-16 12:52:19,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=727, PETRI_PLACES=236, PETRI_TRANSITIONS=212} [2022-11-16 12:52:19,662 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 47 predicate places. [2022-11-16 12:52:19,662 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 212 transitions, 727 flow [2022-11-16 12:52:19,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:19,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:19,663 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:19,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:19,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:19,873 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)] === [2022-11-16 12:52:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash -772543185, now seen corresponding path program 2 times [2022-11-16 12:52:19,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28004932] [2022-11-16 12:52:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:21,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:21,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28004932] [2022-11-16 12:52:21,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28004932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:21,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475600391] [2022-11-16 12:52:21,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:52:21,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:21,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:21,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:21,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:52:21,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:52:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:52:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:23,110 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:52:23,111 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:52:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:23,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:23,407 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:52:23,408 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-16 12:52:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:25,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475600391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:25,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:25,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 42 [2022-11-16 12:52:25,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504432657] [2022-11-16 12:52:25,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 12:52:25,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 12:52:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:52:25,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 211 [2022-11-16 12:52:25,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 212 transitions, 727 flow. Second operand has 42 states, 42 states have (on average 132.5) internal successors, (5565), 42 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:25,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:25,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 211 [2022-11-16 12:52:25,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:31,912 INFO L130 PetriNetUnfolder]: 5512/15058 cut-off events. [2022-11-16 12:52:31,912 INFO L131 PetriNetUnfolder]: For 19409/20205 co-relation queries the response was YES. [2022-11-16 12:52:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37155 conditions, 15058 events. 5512/15058 cut-off events. For 19409/20205 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 156710 event pairs, 1288 based on Foata normal form. 94/14540 useless extension candidates. Maximal degree in co-relation 37128. Up to 2605 conditions per place. [2022-11-16 12:52:32,047 INFO L137 encePairwiseOnDemand]: 178/211 looper letters, 270 selfloop transitions, 99 changer transitions 3/486 dead transitions. [2022-11-16 12:52:32,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 486 transitions, 2698 flow [2022-11-16 12:52:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:52:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-16 12:52:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6462 transitions. [2022-11-16 12:52:32,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6380331753554502 [2022-11-16 12:52:32,061 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6462 transitions. [2022-11-16 12:52:32,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6462 transitions. [2022-11-16 12:52:32,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:32,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6462 transitions. [2022-11-16 12:52:32,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 134.625) internal successors, (6462), 48 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 211.0) internal successors, (10339), 49 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,096 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 211.0) internal successors, (10339), 49 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,096 INFO L175 Difference]: Start difference. First operand has 236 places, 212 transitions, 727 flow. Second operand 48 states and 6462 transitions. [2022-11-16 12:52:32,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 486 transitions, 2698 flow [2022-11-16 12:52:32,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 486 transitions, 2647 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-11-16 12:52:32,120 INFO L231 Difference]: Finished difference. Result has 295 places, 291 transitions, 1504 flow [2022-11-16 12:52:32,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1504, PETRI_PLACES=295, PETRI_TRANSITIONS=291} [2022-11-16 12:52:32,121 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 106 predicate places. [2022-11-16 12:52:32,121 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 291 transitions, 1504 flow [2022-11-16 12:52:32,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 132.5) internal successors, (5565), 42 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:32,124 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:32,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:52:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:52:32,331 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)] === [2022-11-16 12:52:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2012600319, now seen corresponding path program 3 times [2022-11-16 12:52:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973625463] [2022-11-16 12:52:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:34,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973625463] [2022-11-16 12:52:34,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973625463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261621837] [2022-11-16 12:52:34,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:52:34,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:34,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:34,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:34,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:52:34,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:52:34,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:52:34,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:34,873 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 12:52:34,873 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 12:52:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:52:34,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:34,947 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:52:34,947 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-16 12:52:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:52:35,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261621837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:35,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:35,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 22 [2022-11-16 12:52:35,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508327528] [2022-11-16 12:52:35,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:35,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:52:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:52:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:52:35,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 211 [2022-11-16 12:52:35,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 291 transitions, 1504 flow. Second operand has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:35,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:35,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 211 [2022-11-16 12:52:35,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:40,836 INFO L130 PetriNetUnfolder]: 6633/17350 cut-off events. [2022-11-16 12:52:40,836 INFO L131 PetriNetUnfolder]: For 99587/101298 co-relation queries the response was YES. [2022-11-16 12:52:40,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67829 conditions, 17350 events. 6633/17350 cut-off events. For 99587/101298 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 183470 event pairs, 2387 based on Foata normal form. 210/17189 useless extension candidates. Maximal degree in co-relation 67785. Up to 7218 conditions per place. [2022-11-16 12:52:40,989 INFO L137 encePairwiseOnDemand]: 183/211 looper letters, 208 selfloop transitions, 80 changer transitions 0/402 dead transitions. [2022-11-16 12:52:40,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 402 transitions, 2873 flow [2022-11-16 12:52:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:52:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-16 12:52:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4791 transitions. [2022-11-16 12:52:40,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6307266982622433 [2022-11-16 12:52:40,997 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4791 transitions. [2022-11-16 12:52:40,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4791 transitions. [2022-11-16 12:52:40,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:40,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4791 transitions. [2022-11-16 12:52:41,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 133.08333333333334) internal successors, (4791), 36 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:41,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 211.0) internal successors, (7807), 37 states have internal predecessors, (7807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:41,021 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 211.0) internal successors, (7807), 37 states have internal predecessors, (7807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:41,021 INFO L175 Difference]: Start difference. First operand has 295 places, 291 transitions, 1504 flow. Second operand 36 states and 4791 transitions. [2022-11-16 12:52:41,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 402 transitions, 2873 flow [2022-11-16 12:52:41,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 402 transitions, 2726 flow, removed 57 selfloop flow, removed 13 redundant places. [2022-11-16 12:52:41,159 INFO L231 Difference]: Finished difference. Result has 322 places, 319 transitions, 1860 flow [2022-11-16 12:52:41,160 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1860, PETRI_PLACES=322, PETRI_TRANSITIONS=319} [2022-11-16 12:52:41,161 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 133 predicate places. [2022-11-16 12:52:41,161 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 319 transitions, 1860 flow [2022-11-16 12:52:41,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 134.0) internal successors, (2948), 22 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:41,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:41,162 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:41,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:41,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:52:41,371 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)] === [2022-11-16 12:52:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1366218993, now seen corresponding path program 4 times [2022-11-16 12:52:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:41,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768417198] [2022-11-16 12:52:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:41,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:43,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:43,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768417198] [2022-11-16 12:52:43,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768417198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:43,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300240600] [2022-11-16 12:52:43,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:52:43,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:43,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:43,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:43,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:52:43,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:52:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:52:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:52:45,359 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 21 [2022-11-16 12:52:45,612 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-16 12:52:45,612 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-11-16 12:52:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:45,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:52:45,987 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-16 12:52:45,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-16 12:52:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:52:48,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300240600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:48,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:48,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 54 [2022-11-16 12:52:48,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786315559] [2022-11-16 12:52:48,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 12:52:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 12:52:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2605, Unknown=1, NotChecked=0, Total=2862 [2022-11-16 12:52:48,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 211 [2022-11-16 12:52:48,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 319 transitions, 1860 flow. Second operand has 54 states, 54 states have (on average 125.37037037037037) internal successors, (6770), 54 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:48,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:48,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 211 [2022-11-16 12:52:48,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:13,764 INFO L130 PetriNetUnfolder]: 20524/54383 cut-off events. [2022-11-16 12:53:13,764 INFO L131 PetriNetUnfolder]: For 386418/394147 co-relation queries the response was YES. [2022-11-16 12:53:14,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224643 conditions, 54383 events. 20524/54383 cut-off events. For 386418/394147 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 683976 event pairs, 3220 based on Foata normal form. 1951/55466 useless extension candidates. Maximal degree in co-relation 224594. Up to 10127 conditions per place. [2022-11-16 12:53:14,395 INFO L137 encePairwiseOnDemand]: 167/211 looper letters, 542 selfloop transitions, 339 changer transitions 11/1002 dead transitions. [2022-11-16 12:53:14,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1002 transitions, 10475 flow [2022-11-16 12:53:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-16 12:53:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-11-16 12:53:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 11724 transitions. [2022-11-16 12:53:14,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.603956315681022 [2022-11-16 12:53:14,421 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 11724 transitions. [2022-11-16 12:53:14,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 11724 transitions. [2022-11-16 12:53:14,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:14,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 11724 transitions. [2022-11-16 12:53:14,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 127.43478260869566) internal successors, (11724), 92 states have internal predecessors, (11724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 211.0) internal successors, (19623), 93 states have internal predecessors, (19623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,486 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 211.0) internal successors, (19623), 93 states have internal predecessors, (19623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,487 INFO L175 Difference]: Start difference. First operand has 322 places, 319 transitions, 1860 flow. Second operand 92 states and 11724 transitions. [2022-11-16 12:53:14,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1002 transitions, 10475 flow [2022-11-16 12:53:15,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1002 transitions, 10386 flow, removed 8 selfloop flow, removed 29 redundant places. [2022-11-16 12:53:15,338 INFO L231 Difference]: Finished difference. Result has 421 places, 600 transitions, 6318 flow [2022-11-16 12:53:15,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=6318, PETRI_PLACES=421, PETRI_TRANSITIONS=600} [2022-11-16 12:53:15,340 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 232 predicate places. [2022-11-16 12:53:15,340 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 600 transitions, 6318 flow [2022-11-16 12:53:15,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 125.37037037037037) internal successors, (6770), 54 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:15,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:15,342 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:15,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:15,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:15,549 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)] === [2022-11-16 12:53:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash 733619099, now seen corresponding path program 5 times [2022-11-16 12:53:15,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:15,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901660691] [2022-11-16 12:53:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:17,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:17,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901660691] [2022-11-16 12:53:17,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901660691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596926571] [2022-11-16 12:53:17,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:53:17,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:17,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:17,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:17,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca87f18-e074-4d5e-8476-c19d5a9d3f3e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:53:17,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:53:17,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:53:17,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:17,637 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 12:53:18,093 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:53:18,094 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 12:53:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:19,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 12:53:19,552 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 12:53:19,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:53:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:19,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:20,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:53:20,307 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 155 [2022-11-16 12:53:20,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 126 [2022-11-16 12:53:20,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 102 [2022-11-16 12:53:23,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:53:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:23,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596926571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:23,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:53:23,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 62 [2022-11-16 12:53:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014860886] [2022-11-16 12:53:23,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-16 12:53:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-16 12:53:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3400, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 12:53:23,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 211 [2022-11-16 12:53:23,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 600 transitions, 6318 flow. Second operand has 62 states, 62 states have (on average 119.30645161290323) internal successors, (7397), 62 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:23,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:23,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 211 [2022-11-16 12:53:23,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:55,486 INFO L130 PetriNetUnfolder]: 26155/71700 cut-off events. [2022-11-16 12:53:55,486 INFO L131 PetriNetUnfolder]: For 1119256/1145058 co-relation queries the response was YES. [2022-11-16 12:53:56,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372949 conditions, 71700 events. 26155/71700 cut-off events. For 1119256/1145058 co-relation queries the response was YES. Maximal size of possible extension queue 2290. Compared 943390 event pairs, 4313 based on Foata normal form. 5653/76024 useless extension candidates. Maximal degree in co-relation 372862. Up to 13579 conditions per place. [2022-11-16 12:53:57,084 INFO L137 encePairwiseOnDemand]: 176/211 looper letters, 813 selfloop transitions, 444 changer transitions 37/1401 dead transitions. [2022-11-16 12:53:57,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1401 transitions, 20861 flow [2022-11-16 12:53:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 12:53:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 12:53:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 7580 transitions. [2022-11-16 12:53:57,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.579422106711512 [2022-11-16 12:53:57,096 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 7580 transitions. [2022-11-16 12:53:57,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 7580 transitions. [2022-11-16 12:53:57,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:57,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 7580 transitions. [2022-11-16 12:53:57,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 122.25806451612904) internal successors, (7580), 62 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:57,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 211.0) internal successors, (13293), 63 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:57,129 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 211.0) internal successors, (13293), 63 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:57,129 INFO L175 Difference]: Start difference. First operand has 421 places, 600 transitions, 6318 flow. Second operand 62 states and 7580 transitions. [2022-11-16 12:53:57,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1401 transitions, 20861 flow