./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:40:26,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:40:26,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:40:26,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:40:26,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:40:26,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:40:26,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:40:26,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:40:26,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:40:26,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:40:26,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:40:26,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:40:26,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:40:26,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:40:26,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:40:26,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:40:26,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:40:26,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:40:26,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:40:26,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:40:26,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:40:26,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:40:26,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:40:26,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:40:26,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:40:26,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:40:26,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:40:26,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:40:26,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:40:26,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:40:26,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:40:26,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:40:26,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:40:26,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:40:26,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:40:26,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:40:26,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:40:26,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:40:26,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:40:26,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:40:26,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:40:26,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:40:26,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:40:26,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:40:26,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:40:26,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:40:26,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:40:26,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:40:26,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:40:26,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:40:26,443 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:40:26,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:40:26,444 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:40:26,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:40:26,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:40:26,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:40:26,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:40:26,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:40:26,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:40:26,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:40:26,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:40:26,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:40:26,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:40:26,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:40:26,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:40:26,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:40:26,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:40:26,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:40:26,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:40:26,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:40:26,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:40:26,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:40:26,449 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:40:26,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:40:26,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:40:26,450 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_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-18 18:40:26,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:40:26,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:40:26,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:40:26,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:40:26,733 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:40:26,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-18 18:40:26,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/data/940ec1a51/f6f487fe24cc4a5394d9e34be57db6c8/FLAG15403afda [2022-11-18 18:40:27,339 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:40:27,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-18 18:40:27,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/data/940ec1a51/f6f487fe24cc4a5394d9e34be57db6c8/FLAG15403afda [2022-11-18 18:40:27,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/data/940ec1a51/f6f487fe24cc4a5394d9e34be57db6c8 [2022-11-18 18:40:27,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:40:27,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:40:27,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:40:27,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:40:27,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:40:27,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:27,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4941948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27, skipping insertion in model container [2022-11-18 18:40:27,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:27,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:40:27,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:40:27,941 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-18 18:40:27,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:40:27,959 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:40:27,977 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-18 18:40:27,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:40:27,996 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:40:27,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27 WrapperNode [2022-11-18 18:40:27,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:40:27,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:40:27,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:40:27,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:40:28,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,052 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2022-11-18 18:40:28,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:40:28,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:40:28,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:40:28,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:40:28,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:40:28,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:40:28,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:40:28,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:40:28,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (1/1) ... [2022-11-18 18:40:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:40:28,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:28,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:40:28,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:40:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:40:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:40:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:40:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:40:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:40:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:40:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:40:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:40:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:40:28,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:40:28,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:40:28,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:40:28,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:40:28,196 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:40:28,350 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:40:28,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:40:28,715 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:40:28,726 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:40:28,727 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 18:40:28,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:40:28 BoogieIcfgContainer [2022-11-18 18:40:28,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:40:28,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:40:28,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:40:28,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:40:28,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:40:27" (1/3) ... [2022-11-18 18:40:28,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df4adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:40:28, skipping insertion in model container [2022-11-18 18:40:28,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:40:27" (2/3) ... [2022-11-18 18:40:28,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df4adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:40:28, skipping insertion in model container [2022-11-18 18:40:28,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:40:28" (3/3) ... [2022-11-18 18:40:28,747 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-11-18 18:40:28,759 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:40:28,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:40:28,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:40:28,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:40:28,916 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:40:28,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 364 flow [2022-11-18 18:40:29,102 INFO L130 PetriNetUnfolder]: 15/172 cut-off events. [2022-11-18 18:40:29,105 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:40:29,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 15/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2022-11-18 18:40:29,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 174 transitions, 364 flow [2022-11-18 18:40:29,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2022-11-18 18:40:29,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:40:29,149 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;@5b369912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:40:29,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 18:40:29,211 INFO L130 PetriNetUnfolder]: 15/162 cut-off events. [2022-11-18 18:40:29,211 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:40:29,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:29,212 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] [2022-11-18 18:40:29,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1557600384, now seen corresponding path program 1 times [2022-11-18 18:40:29,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115897097] [2022-11-18 18:40:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:29,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115897097] [2022-11-18 18:40:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115897097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:40:29,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136321520] [2022-11-18 18:40:29,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:40:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:40:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:40:29,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 174 [2022-11-18 18:40:29,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:29,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:29,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 174 [2022-11-18 18:40:29,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:29,767 INFO L130 PetriNetUnfolder]: 6/154 cut-off events. [2022-11-18 18:40:29,767 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 18:40:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 154 events. 6/154 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 103 event pairs, 0 based on Foata normal form. 11/154 useless extension candidates. Maximal degree in co-relation 125. Up to 5 conditions per place. [2022-11-18 18:40:29,772 INFO L137 encePairwiseOnDemand]: 165/174 looper letters, 4 selfloop transitions, 0 changer transitions 5/154 dead transitions. [2022-11-18 18:40:29,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 328 flow [2022-11-18 18:40:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:40:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:40:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2022-11-18 18:40:29,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9568965517241379 [2022-11-18 18:40:29,797 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2022-11-18 18:40:29,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2022-11-18 18:40:29,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:29,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2022-11-18 18:40:29,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:29,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:29,821 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:29,824 INFO L175 Difference]: Start difference. First operand has 155 places, 163 transitions, 338 flow. Second operand 2 states and 333 transitions. [2022-11-18 18:40:29,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 328 flow [2022-11-18 18:40:29,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 154 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:40:29,835 INFO L231 Difference]: Finished difference. Result has 152 places, 149 transitions, 302 flow [2022-11-18 18:40:29,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=302, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-11-18 18:40:29,842 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -3 predicate places. [2022-11-18 18:40:29,842 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 302 flow [2022-11-18 18:40:29,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:29,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:29,844 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] [2022-11-18 18:40:29,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:40:29,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2116646914, now seen corresponding path program 1 times [2022-11-18 18:40:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161441175] [2022-11-18 18:40:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:30,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:30,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161441175] [2022-11-18 18:40:30,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161441175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:30,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:30,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:40:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562231394] [2022-11-18 18:40:30,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:30,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:40:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:40:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:40:30,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2022-11-18 18:40:30,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:30,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:30,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2022-11-18 18:40:30,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:30,968 INFO L130 PetriNetUnfolder]: 177/645 cut-off events. [2022-11-18 18:40:30,968 INFO L131 PetriNetUnfolder]: For 21/33 co-relation queries the response was YES. [2022-11-18 18:40:30,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 645 events. 177/645 cut-off events. For 21/33 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3133 event pairs, 35 based on Foata normal form. 1/560 useless extension candidates. Maximal degree in co-relation 985. Up to 122 conditions per place. [2022-11-18 18:40:30,974 INFO L137 encePairwiseOnDemand]: 167/174 looper letters, 65 selfloop transitions, 5 changer transitions 4/185 dead transitions. [2022-11-18 18:40:30,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 185 transitions, 527 flow [2022-11-18 18:40:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:40:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:40:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2022-11-18 18:40:30,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2022-11-18 18:40:30,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2022-11-18 18:40:30,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2022-11-18 18:40:30,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:30,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2022-11-18 18:40:30,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:30,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:30,985 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:30,985 INFO L175 Difference]: Start difference. First operand has 152 places, 149 transitions, 302 flow. Second operand 6 states and 801 transitions. [2022-11-18 18:40:30,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 185 transitions, 527 flow [2022-11-18 18:40:30,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:40:30,990 INFO L231 Difference]: Finished difference. Result has 155 places, 152 transitions, 331 flow [2022-11-18 18:40:30,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2022-11-18 18:40:30,992 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-18 18:40:30,992 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 331 flow [2022-11-18 18:40:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:30,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:30,993 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] [2022-11-18 18:40:30,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:40:30,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash 329307901, now seen corresponding path program 1 times [2022-11-18 18:40:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443252978] [2022-11-18 18:40:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:30,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443252978] [2022-11-18 18:40:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443252978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:31,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:31,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:40:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981772346] [2022-11-18 18:40:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:31,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:40:31,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:40:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:40:31,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-11-18 18:40:31,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:31,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:31,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-11-18 18:40:31,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:31,549 INFO L130 PetriNetUnfolder]: 110/597 cut-off events. [2022-11-18 18:40:31,550 INFO L131 PetriNetUnfolder]: For 31/42 co-relation queries the response was YES. [2022-11-18 18:40:31,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 597 events. 110/597 cut-off events. For 31/42 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2642 event pairs, 44 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 880. Up to 97 conditions per place. [2022-11-18 18:40:31,554 INFO L137 encePairwiseOnDemand]: 162/174 looper letters, 63 selfloop transitions, 14 changer transitions 0/187 dead transitions. [2022-11-18 18:40:31,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 187 transitions, 565 flow [2022-11-18 18:40:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:40:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:40:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1317 transitions. [2022-11-18 18:40:31,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.756896551724138 [2022-11-18 18:40:31,558 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1317 transitions. [2022-11-18 18:40:31,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1317 transitions. [2022-11-18 18:40:31,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:31,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1317 transitions. [2022-11-18 18:40:31,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:31,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:31,567 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:31,568 INFO L175 Difference]: Start difference. First operand has 155 places, 152 transitions, 331 flow. Second operand 10 states and 1317 transitions. [2022-11-18 18:40:31,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 187 transitions, 565 flow [2022-11-18 18:40:31,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 187 transitions, 561 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 18:40:31,573 INFO L231 Difference]: Finished difference. Result has 162 places, 156 transitions, 375 flow [2022-11-18 18:40:31,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=375, PETRI_PLACES=162, PETRI_TRANSITIONS=156} [2022-11-18 18:40:31,574 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 7 predicate places. [2022-11-18 18:40:31,575 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 156 transitions, 375 flow [2022-11-18 18:40:31,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:31,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:31,576 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] [2022-11-18 18:40:31,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:40:31,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:31,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1780407069, now seen corresponding path program 1 times [2022-11-18 18:40:31,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:31,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954295925] [2022-11-18 18:40:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:31,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:31,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:31,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954295925] [2022-11-18 18:40:31,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954295925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:31,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:31,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:40:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766762474] [2022-11-18 18:40:31,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:31,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:40:31,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:31,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:40:31,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:40:31,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-11-18 18:40:31,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 156 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:31,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:31,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-11-18 18:40:31,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:32,075 INFO L130 PetriNetUnfolder]: 105/629 cut-off events. [2022-11-18 18:40:32,075 INFO L131 PetriNetUnfolder]: For 77/86 co-relation queries the response was YES. [2022-11-18 18:40:32,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 629 events. 105/629 cut-off events. For 77/86 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2944 event pairs, 32 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 957. Up to 87 conditions per place. [2022-11-18 18:40:32,079 INFO L137 encePairwiseOnDemand]: 162/174 looper letters, 46 selfloop transitions, 11 changer transitions 19/187 dead transitions. [2022-11-18 18:40:32,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 187 transitions, 602 flow [2022-11-18 18:40:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:40:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 18:40:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1316 transitions. [2022-11-18 18:40:32,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7563218390804598 [2022-11-18 18:40:32,083 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1316 transitions. [2022-11-18 18:40:32,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1316 transitions. [2022-11-18 18:40:32,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:32,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1316 transitions. [2022-11-18 18:40:32,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.6) internal successors, (1316), 10 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,111 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,112 INFO L175 Difference]: Start difference. First operand has 162 places, 156 transitions, 375 flow. Second operand 10 states and 1316 transitions. [2022-11-18 18:40:32,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 187 transitions, 602 flow [2022-11-18 18:40:32,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 187 transitions, 594 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:40:32,117 INFO L231 Difference]: Finished difference. Result has 170 places, 154 transitions, 393 flow [2022-11-18 18:40:32,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=170, PETRI_TRANSITIONS=154} [2022-11-18 18:40:32,118 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 15 predicate places. [2022-11-18 18:40:32,118 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 154 transitions, 393 flow [2022-11-18 18:40:32,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:32,119 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] [2022-11-18 18:40:32,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:40:32,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:32,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1055001396, now seen corresponding path program 1 times [2022-11-18 18:40:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611946815] [2022-11-18 18:40:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:32,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:40:32,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611946815] [2022-11-18 18:40:32,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611946815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:32,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:40:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116525539] [2022-11-18 18:40:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:32,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:40:32,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:40:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:40:32,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-11-18 18:40:32,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 154 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:32,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-11-18 18:40:32,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:32,666 INFO L130 PetriNetUnfolder]: 118/629 cut-off events. [2022-11-18 18:40:32,667 INFO L131 PetriNetUnfolder]: For 136/147 co-relation queries the response was YES. [2022-11-18 18:40:32,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 629 events. 118/629 cut-off events. For 136/147 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2979 event pairs, 44 based on Foata normal form. 7/589 useless extension candidates. Maximal degree in co-relation 1012. Up to 97 conditions per place. [2022-11-18 18:40:32,671 INFO L137 encePairwiseOnDemand]: 164/174 looper letters, 56 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2022-11-18 18:40:32,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 177 transitions, 587 flow [2022-11-18 18:40:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:40:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:40:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2022-11-18 18:40:32,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7593390804597702 [2022-11-18 18:40:32,675 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2022-11-18 18:40:32,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2022-11-18 18:40:32,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:32,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2022-11-18 18:40:32,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,682 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,682 INFO L175 Difference]: Start difference. First operand has 170 places, 154 transitions, 393 flow. Second operand 8 states and 1057 transitions. [2022-11-18 18:40:32,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 177 transitions, 587 flow [2022-11-18 18:40:32,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 177 transitions, 552 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-11-18 18:40:32,689 INFO L231 Difference]: Finished difference. Result has 165 places, 156 transitions, 398 flow [2022-11-18 18:40:32,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2022-11-18 18:40:32,692 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 10 predicate places. [2022-11-18 18:40:32,693 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 398 flow [2022-11-18 18:40:32,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:32,694 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] [2022-11-18 18:40:32,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:40:32,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -679366620, now seen corresponding path program 1 times [2022-11-18 18:40:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:32,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932228838] [2022-11-18 18:40:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:32,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:40:32,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932228838] [2022-11-18 18:40:32,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932228838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:32,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:32,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:40:32,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204470531] [2022-11-18 18:40:32,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:32,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:40:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:32,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:40:32,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:40:32,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-11-18 18:40:32,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:32,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:32,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-11-18 18:40:32,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:33,263 INFO L130 PetriNetUnfolder]: 104/601 cut-off events. [2022-11-18 18:40:33,263 INFO L131 PetriNetUnfolder]: For 111/120 co-relation queries the response was YES. [2022-11-18 18:40:33,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 601 events. 104/601 cut-off events. For 111/120 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2848 event pairs, 32 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 941. Up to 87 conditions per place. [2022-11-18 18:40:33,268 INFO L137 encePairwiseOnDemand]: 164/174 looper letters, 49 selfloop transitions, 9 changer transitions 7/176 dead transitions. [2022-11-18 18:40:33,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 176 transitions, 579 flow [2022-11-18 18:40:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:40:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:40:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1056 transitions. [2022-11-18 18:40:33,272 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7586206896551724 [2022-11-18 18:40:33,272 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1056 transitions. [2022-11-18 18:40:33,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1056 transitions. [2022-11-18 18:40:33,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:33,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1056 transitions. [2022-11-18 18:40:33,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:33,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:33,279 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:33,279 INFO L175 Difference]: Start difference. First operand has 165 places, 156 transitions, 398 flow. Second operand 8 states and 1056 transitions. [2022-11-18 18:40:33,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 176 transitions, 579 flow [2022-11-18 18:40:33,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 176 transitions, 561 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 18:40:33,288 INFO L231 Difference]: Finished difference. Result has 168 places, 155 transitions, 394 flow [2022-11-18 18:40:33,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2022-11-18 18:40:33,291 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 13 predicate places. [2022-11-18 18:40:33,291 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 394 flow [2022-11-18 18:40:33,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:33,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:33,292 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] [2022-11-18 18:40:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:40:33,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2100548871, now seen corresponding path program 1 times [2022-11-18 18:40:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:33,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353807618] [2022-11-18 18:40:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:33,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:40:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353807618] [2022-11-18 18:40:33,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353807618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20764837] [2022-11-18 18:40:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:33,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:33,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:40:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:40:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:40:34,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:40:35,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20764837] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:35,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:35,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2022-11-18 18:40:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051183438] [2022-11-18 18:40:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:35,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:40:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:40:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:40:35,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2022-11-18 18:40:35,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:35,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:35,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2022-11-18 18:40:35,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:36,008 INFO L130 PetriNetUnfolder]: 89/571 cut-off events. [2022-11-18 18:40:36,009 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2022-11-18 18:40:36,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 571 events. 89/571 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2664 event pairs, 24 based on Foata normal form. 6/540 useless extension candidates. Maximal degree in co-relation 906. Up to 71 conditions per place. [2022-11-18 18:40:36,014 INFO L137 encePairwiseOnDemand]: 160/174 looper letters, 49 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2022-11-18 18:40:36,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 173 transitions, 574 flow [2022-11-18 18:40:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:40:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 18:40:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1770 transitions. [2022-11-18 18:40:36,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7266009852216748 [2022-11-18 18:40:36,019 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1770 transitions. [2022-11-18 18:40:36,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1770 transitions. [2022-11-18 18:40:36,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:36,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1770 transitions. [2022-11-18 18:40:36,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.42857142857143) internal successors, (1770), 14 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) [2022-11-18 18:40:36,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:36,031 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:36,031 INFO L175 Difference]: Start difference. First operand has 168 places, 155 transitions, 394 flow. Second operand 14 states and 1770 transitions. [2022-11-18 18:40:36,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 173 transitions, 574 flow [2022-11-18 18:40:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 544 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-11-18 18:40:36,036 INFO L231 Difference]: Finished difference. Result has 175 places, 158 transitions, 426 flow [2022-11-18 18:40:36,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=158} [2022-11-18 18:40:36,037 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 20 predicate places. [2022-11-18 18:40:36,037 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 158 transitions, 426 flow [2022-11-18 18:40:36,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:36,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:36,038 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] [2022-11-18 18:40:36,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:36,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:36,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash 826634285, now seen corresponding path program 1 times [2022-11-18 18:40:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:36,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510100056] [2022-11-18 18:40:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:36,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:36,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:36,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510100056] [2022-11-18 18:40:36,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510100056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:36,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856326369] [2022-11-18 18:40:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:36,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:36,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:36,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:40:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:40:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:37,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:38,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856326369] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:38,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:40:38,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2022-11-18 18:40:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632648931] [2022-11-18 18:40:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:40:38,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:40:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-11-18 18:40:38,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2022-11-18 18:40:38,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 158 transitions, 426 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:38,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:38,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2022-11-18 18:40:38,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:38,762 INFO L130 PetriNetUnfolder]: 76/555 cut-off events. [2022-11-18 18:40:38,762 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-11-18 18:40:38,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 555 events. 76/555 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2683 event pairs, 27 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 899. Up to 80 conditions per place. [2022-11-18 18:40:38,766 INFO L137 encePairwiseOnDemand]: 160/174 looper letters, 50 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2022-11-18 18:40:38,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 174 transitions, 610 flow [2022-11-18 18:40:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:40:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 18:40:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1768 transitions. [2022-11-18 18:40:38,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7257799671592775 [2022-11-18 18:40:38,771 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1768 transitions. [2022-11-18 18:40:38,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1768 transitions. [2022-11-18 18:40:38,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:38,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1768 transitions. [2022-11-18 18:40:38,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.28571428571429) internal successors, (1768), 14 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:38,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:38,783 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:38,783 INFO L175 Difference]: Start difference. First operand has 175 places, 158 transitions, 426 flow. Second operand 14 states and 1768 transitions. [2022-11-18 18:40:38,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 174 transitions, 610 flow [2022-11-18 18:40:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 174 transitions, 587 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-18 18:40:38,788 INFO L231 Difference]: Finished difference. Result has 182 places, 159 transitions, 447 flow [2022-11-18 18:40:38,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=447, PETRI_PLACES=182, PETRI_TRANSITIONS=159} [2022-11-18 18:40:38,790 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 27 predicate places. [2022-11-18 18:40:38,791 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 159 transitions, 447 flow [2022-11-18 18:40:38,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:38,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:38,792 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] [2022-11-18 18:40:38,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:39,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:39,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:39,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1035696176, now seen corresponding path program 1 times [2022-11-18 18:40:39,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:39,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794950701] [2022-11-18 18:40:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:39,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:40:40,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794950701] [2022-11-18 18:40:40,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794950701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:40,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:40,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:40:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69942603] [2022-11-18 18:40:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:40,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:40:40,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:40:40,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:40:40,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:40:40,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 159 transitions, 447 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:40,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:40,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:40:40,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:42,042 INFO L130 PetriNetUnfolder]: 2027/4160 cut-off events. [2022-11-18 18:40:42,042 INFO L131 PetriNetUnfolder]: For 1816/1816 co-relation queries the response was YES. [2022-11-18 18:40:42,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 4160 events. 2027/4160 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 29579 event pairs, 227 based on Foata normal form. 0/3904 useless extension candidates. Maximal degree in co-relation 8750. Up to 1607 conditions per place. [2022-11-18 18:40:42,072 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 139 selfloop transitions, 44 changer transitions 44/320 dead transitions. [2022-11-18 18:40:42,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 1304 flow [2022-11-18 18:40:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 18:40:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-18 18:40:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3451 transitions. [2022-11-18 18:40:42,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6397849462365591 [2022-11-18 18:40:42,081 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3451 transitions. [2022-11-18 18:40:42,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3451 transitions. [2022-11-18 18:40:42,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:42,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3451 transitions. [2022-11-18 18:40:42,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 111.3225806451613) internal successors, (3451), 31 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,103 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,103 INFO L175 Difference]: Start difference. First operand has 182 places, 159 transitions, 447 flow. Second operand 31 states and 3451 transitions. [2022-11-18 18:40:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 1304 flow [2022-11-18 18:40:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 320 transitions, 1275 flow, removed 1 selfloop flow, removed 11 redundant places. [2022-11-18 18:40:42,112 INFO L231 Difference]: Finished difference. Result has 214 places, 185 transitions, 690 flow [2022-11-18 18:40:42,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=690, PETRI_PLACES=214, PETRI_TRANSITIONS=185} [2022-11-18 18:40:42,113 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 59 predicate places. [2022-11-18 18:40:42,113 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 185 transitions, 690 flow [2022-11-18 18:40:42,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:42,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:42,115 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] [2022-11-18 18:40:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:40:42,115 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158248, now seen corresponding path program 2 times [2022-11-18 18:40:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:42,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395383363] [2022-11-18 18:40:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:40:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395383363] [2022-11-18 18:40:43,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395383363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:43,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:43,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 18:40:43,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983220257] [2022-11-18 18:40:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:43,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:40:43,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:40:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:40:43,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:40:43,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 185 transitions, 690 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:43,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:43,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:40:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:45,480 INFO L130 PetriNetUnfolder]: 2117/4258 cut-off events. [2022-11-18 18:40:45,480 INFO L131 PetriNetUnfolder]: For 4779/4797 co-relation queries the response was YES. [2022-11-18 18:40:45,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11627 conditions, 4258 events. 2117/4258 cut-off events. For 4779/4797 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 29970 event pairs, 312 based on Foata normal form. 35/4268 useless extension candidates. Maximal degree in co-relation 11601. Up to 881 conditions per place. [2022-11-18 18:40:45,520 INFO L137 encePairwiseOnDemand]: 144/174 looper letters, 239 selfloop transitions, 77 changer transitions 1/410 dead transitions. [2022-11-18 18:40:45,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 410 transitions, 2302 flow [2022-11-18 18:40:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 18:40:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-18 18:40:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3921 transitions. [2022-11-18 18:40:45,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6438423645320197 [2022-11-18 18:40:45,535 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3921 transitions. [2022-11-18 18:40:45,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3921 transitions. [2022-11-18 18:40:45,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:45,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3921 transitions. [2022-11-18 18:40:45,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 112.02857142857142) internal successors, (3921), 35 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,569 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,569 INFO L175 Difference]: Start difference. First operand has 214 places, 185 transitions, 690 flow. Second operand 35 states and 3921 transitions. [2022-11-18 18:40:45,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 410 transitions, 2302 flow [2022-11-18 18:40:45,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 410 transitions, 2197 flow, removed 24 selfloop flow, removed 19 redundant places. [2022-11-18 18:40:45,610 INFO L231 Difference]: Finished difference. Result has 239 places, 235 transitions, 1221 flow [2022-11-18 18:40:45,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1221, PETRI_PLACES=239, PETRI_TRANSITIONS=235} [2022-11-18 18:40:45,613 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 84 predicate places. [2022-11-18 18:40:45,613 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 235 transitions, 1221 flow [2022-11-18 18:40:45,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:45,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:45,614 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] [2022-11-18 18:40:45,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:40:45,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1668141130, now seen corresponding path program 3 times [2022-11-18 18:40:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896127518] [2022-11-18 18:40:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:45,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:40:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896127518] [2022-11-18 18:40:47,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896127518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:47,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:47,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-18 18:40:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806068002] [2022-11-18 18:40:47,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 18:40:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 18:40:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:40:47,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-11-18 18:40:47,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 235 transitions, 1221 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:47,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:47,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-11-18 18:40:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:50,185 INFO L130 PetriNetUnfolder]: 2144/4352 cut-off events. [2022-11-18 18:40:50,186 INFO L131 PetriNetUnfolder]: For 8420/8438 co-relation queries the response was YES. [2022-11-18 18:40:50,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13862 conditions, 4352 events. 2144/4352 cut-off events. For 8420/8438 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 31243 event pairs, 357 based on Foata normal form. 20/4352 useless extension candidates. Maximal degree in co-relation 13822. Up to 1794 conditions per place. [2022-11-18 18:40:50,225 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 150 selfloop transitions, 79 changer transitions 40/359 dead transitions. [2022-11-18 18:40:50,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 359 transitions, 2389 flow [2022-11-18 18:40:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:40:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 18:40:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3381 transitions. [2022-11-18 18:40:50,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6072198275862069 [2022-11-18 18:40:50,232 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3381 transitions. [2022-11-18 18:40:50,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3381 transitions. [2022-11-18 18:40:50,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:50,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3381 transitions. [2022-11-18 18:40:50,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 105.65625) internal successors, (3381), 32 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:50,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:50,250 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:50,250 INFO L175 Difference]: Start difference. First operand has 239 places, 235 transitions, 1221 flow. Second operand 32 states and 3381 transitions. [2022-11-18 18:40:50,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 359 transitions, 2389 flow [2022-11-18 18:40:50,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 359 transitions, 2307 flow, removed 16 selfloop flow, removed 16 redundant places. [2022-11-18 18:40:50,324 INFO L231 Difference]: Finished difference. Result has 265 places, 246 transitions, 1517 flow [2022-11-18 18:40:50,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1517, PETRI_PLACES=265, PETRI_TRANSITIONS=246} [2022-11-18 18:40:50,325 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 110 predicate places. [2022-11-18 18:40:50,325 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 246 transitions, 1517 flow [2022-11-18 18:40:50,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:50,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:50,326 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] [2022-11-18 18:40:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:40:50,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1706094028, now seen corresponding path program 1 times [2022-11-18 18:40:50,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:50,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807517493] [2022-11-18 18:40:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:40:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:51,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807517493] [2022-11-18 18:40:51,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807517493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:51,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:51,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 18:40:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993037129] [2022-11-18 18:40:51,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:40:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:51,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:40:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:40:51,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:40:51,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 246 transitions, 1517 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:51,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:51,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:40:51,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:54,222 INFO L130 PetriNetUnfolder]: 2797/5629 cut-off events. [2022-11-18 18:40:54,223 INFO L131 PetriNetUnfolder]: For 16237/16250 co-relation queries the response was YES. [2022-11-18 18:40:54,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19533 conditions, 5629 events. 2797/5629 cut-off events. For 16237/16250 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 42773 event pairs, 311 based on Foata normal form. 44/5654 useless extension candidates. Maximal degree in co-relation 19481. Up to 1827 conditions per place. [2022-11-18 18:40:54,289 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 267 selfloop transitions, 112 changer transitions 1/473 dead transitions. [2022-11-18 18:40:54,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 473 transitions, 3644 flow [2022-11-18 18:40:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 18:40:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 18:40:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4063 transitions. [2022-11-18 18:40:54,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6486270753512133 [2022-11-18 18:40:54,299 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4063 transitions. [2022-11-18 18:40:54,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4063 transitions. [2022-11-18 18:40:54,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:54,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4063 transitions. [2022-11-18 18:40:54,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 112.86111111111111) internal successors, (4063), 36 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:54,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:54,320 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:54,320 INFO L175 Difference]: Start difference. First operand has 265 places, 246 transitions, 1517 flow. Second operand 36 states and 4063 transitions. [2022-11-18 18:40:54,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 473 transitions, 3644 flow [2022-11-18 18:40:54,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 473 transitions, 3467 flow, removed 53 selfloop flow, removed 22 redundant places. [2022-11-18 18:40:54,475 INFO L231 Difference]: Finished difference. Result has 284 places, 294 transitions, 2244 flow [2022-11-18 18:40:54,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2244, PETRI_PLACES=284, PETRI_TRANSITIONS=294} [2022-11-18 18:40:54,476 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 129 predicate places. [2022-11-18 18:40:54,477 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 294 transitions, 2244 flow [2022-11-18 18:40:54,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:54,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:54,478 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] [2022-11-18 18:40:54,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:40:54,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:54,479 INFO L85 PathProgramCache]: Analyzing trace with hash -424897602, now seen corresponding path program 2 times [2022-11-18 18:40:54,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:54,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881095062] [2022-11-18 18:40:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:54,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:40:55,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:55,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881095062] [2022-11-18 18:40:55,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881095062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:55,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:55,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:40:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460831310] [2022-11-18 18:40:55,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:55,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:40:55,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:40:55,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:40:55,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:40:55,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 294 transitions, 2244 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:55,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:55,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:40:55,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:40:58,208 INFO L130 PetriNetUnfolder]: 2813/5690 cut-off events. [2022-11-18 18:40:58,208 INFO L131 PetriNetUnfolder]: For 19213/19232 co-relation queries the response was YES. [2022-11-18 18:40:58,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20635 conditions, 5690 events. 2813/5690 cut-off events. For 19213/19232 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 43551 event pairs, 378 based on Foata normal form. 10/5672 useless extension candidates. Maximal degree in co-relation 20576. Up to 1827 conditions per place. [2022-11-18 18:40:58,279 INFO L137 encePairwiseOnDemand]: 144/174 looper letters, 188 selfloop transitions, 99 changer transitions 28/408 dead transitions. [2022-11-18 18:40:58,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 408 transitions, 3612 flow [2022-11-18 18:40:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:40:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 18:40:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3314 transitions. [2022-11-18 18:40:58,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6348659003831417 [2022-11-18 18:40:58,286 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3314 transitions. [2022-11-18 18:40:58,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3314 transitions. [2022-11-18 18:40:58,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:40:58,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3314 transitions. [2022-11-18 18:40:58,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 110.46666666666667) internal successors, (3314), 30 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:58,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:58,306 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:58,306 INFO L175 Difference]: Start difference. First operand has 284 places, 294 transitions, 2244 flow. Second operand 30 states and 3314 transitions. [2022-11-18 18:40:58,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 408 transitions, 3612 flow [2022-11-18 18:40:58,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 408 transitions, 3471 flow, removed 49 selfloop flow, removed 15 redundant places. [2022-11-18 18:40:58,507 INFO L231 Difference]: Finished difference. Result has 303 places, 306 transitions, 2484 flow [2022-11-18 18:40:58,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2484, PETRI_PLACES=303, PETRI_TRANSITIONS=306} [2022-11-18 18:40:58,508 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 148 predicate places. [2022-11-18 18:40:58,508 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 306 transitions, 2484 flow [2022-11-18 18:40:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:58,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:40:58,509 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] [2022-11-18 18:40:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:40:58,510 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:40:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash -495527362, now seen corresponding path program 4 times [2022-11-18 18:40:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:58,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821487030] [2022-11-18 18:40:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:58,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:40:59,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:59,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821487030] [2022-11-18 18:40:59,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821487030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:59,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:59,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:40:59,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682236755] [2022-11-18 18:40:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:59,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:40:59,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:40:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:40:59,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:40:59,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 306 transitions, 2484 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:40:59,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:40:59,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:40:59,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:01,864 INFO L130 PetriNetUnfolder]: 2874/5729 cut-off events. [2022-11-18 18:41:01,865 INFO L131 PetriNetUnfolder]: For 17911/17930 co-relation queries the response was YES. [2022-11-18 18:41:01,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20645 conditions, 5729 events. 2874/5729 cut-off events. For 17911/17930 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 43281 event pairs, 509 based on Foata normal form. 16/5714 useless extension candidates. Maximal degree in co-relation 20581. Up to 1837 conditions per place. [2022-11-18 18:41:01,916 INFO L137 encePairwiseOnDemand]: 142/174 looper letters, 198 selfloop transitions, 130 changer transitions 0/421 dead transitions. [2022-11-18 18:41:01,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 421 transitions, 4086 flow [2022-11-18 18:41:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 18:41:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 18:41:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3225 transitions. [2022-11-18 18:41:01,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6391200951248514 [2022-11-18 18:41:01,924 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3225 transitions. [2022-11-18 18:41:01,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3225 transitions. [2022-11-18 18:41:01,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:01,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3225 transitions. [2022-11-18 18:41:01,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.20689655172414) internal successors, (3225), 29 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:01,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:01,941 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:01,941 INFO L175 Difference]: Start difference. First operand has 303 places, 306 transitions, 2484 flow. Second operand 29 states and 3225 transitions. [2022-11-18 18:41:01,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 421 transitions, 4086 flow [2022-11-18 18:41:02,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 421 transitions, 3857 flow, removed 38 selfloop flow, removed 23 redundant places. [2022-11-18 18:41:02,137 INFO L231 Difference]: Finished difference. Result has 312 places, 343 transitions, 3194 flow [2022-11-18 18:41:02,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3194, PETRI_PLACES=312, PETRI_TRANSITIONS=343} [2022-11-18 18:41:02,139 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 157 predicate places. [2022-11-18 18:41:02,139 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 343 transitions, 3194 flow [2022-11-18 18:41:02,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:02,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:02,140 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] [2022-11-18 18:41:02,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:41:02,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1654319362, now seen corresponding path program 3 times [2022-11-18 18:41:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:02,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745802735] [2022-11-18 18:41:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:03,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745802735] [2022-11-18 18:41:03,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745802735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:03,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:03,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907761860] [2022-11-18 18:41:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:03,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:03,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:03,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:03,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 343 transitions, 3194 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:03,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:03,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:03,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:05,323 INFO L130 PetriNetUnfolder]: 2930/5851 cut-off events. [2022-11-18 18:41:05,324 INFO L131 PetriNetUnfolder]: For 20319/20338 co-relation queries the response was YES. [2022-11-18 18:41:05,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21494 conditions, 5851 events. 2930/5851 cut-off events. For 20319/20338 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 44360 event pairs, 440 based on Foata normal form. 10/5833 useless extension candidates. Maximal degree in co-relation 21426. Up to 1837 conditions per place. [2022-11-18 18:41:05,372 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 208 selfloop transitions, 132 changer transitions 10/443 dead transitions. [2022-11-18 18:41:05,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 443 transitions, 4641 flow [2022-11-18 18:41:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 18:41:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 18:41:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3198 transitions. [2022-11-18 18:41:05,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.633769322235434 [2022-11-18 18:41:05,379 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3198 transitions. [2022-11-18 18:41:05,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3198 transitions. [2022-11-18 18:41:05,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:05,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3198 transitions. [2022-11-18 18:41:05,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.27586206896552) internal successors, (3198), 29 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:05,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:05,397 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:05,397 INFO L175 Difference]: Start difference. First operand has 312 places, 343 transitions, 3194 flow. Second operand 29 states and 3198 transitions. [2022-11-18 18:41:05,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 443 transitions, 4641 flow [2022-11-18 18:41:05,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 443 transitions, 4410 flow, removed 21 selfloop flow, removed 19 redundant places. [2022-11-18 18:41:05,598 INFO L231 Difference]: Finished difference. Result has 327 places, 358 transitions, 3576 flow [2022-11-18 18:41:05,599 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3576, PETRI_PLACES=327, PETRI_TRANSITIONS=358} [2022-11-18 18:41:05,600 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 172 predicate places. [2022-11-18 18:41:05,600 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 358 transitions, 3576 flow [2022-11-18 18:41:05,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:05,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:05,601 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] [2022-11-18 18:41:05,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 18:41:05,602 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash 355259556, now seen corresponding path program 5 times [2022-11-18 18:41:05,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:05,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731522721] [2022-11-18 18:41:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:05,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:06,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731522721] [2022-11-18 18:41:06,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731522721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:06,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:06,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:06,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108001936] [2022-11-18 18:41:06,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:06,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:06,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:06,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:06,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:06,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:06,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 358 transitions, 3576 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:06,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:06,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:06,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:08,695 INFO L130 PetriNetUnfolder]: 2977/5894 cut-off events. [2022-11-18 18:41:08,695 INFO L131 PetriNetUnfolder]: For 22437/22456 co-relation queries the response was YES. [2022-11-18 18:41:08,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22159 conditions, 5894 events. 2977/5894 cut-off events. For 22437/22456 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 44502 event pairs, 507 based on Foata normal form. 22/5886 useless extension candidates. Maximal degree in co-relation 22088. Up to 1841 conditions per place. [2022-11-18 18:41:08,747 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 212 selfloop transitions, 150 changer transitions 0/455 dead transitions. [2022-11-18 18:41:08,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 455 transitions, 5085 flow [2022-11-18 18:41:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:41:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 18:41:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2906 transitions. [2022-11-18 18:41:08,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6423519009725907 [2022-11-18 18:41:08,755 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2906 transitions. [2022-11-18 18:41:08,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2906 transitions. [2022-11-18 18:41:08,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:08,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2906 transitions. [2022-11-18 18:41:08,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.76923076923077) internal successors, (2906), 26 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:08,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:08,775 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:08,775 INFO L175 Difference]: Start difference. First operand has 327 places, 358 transitions, 3576 flow. Second operand 26 states and 2906 transitions. [2022-11-18 18:41:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 455 transitions, 5085 flow [2022-11-18 18:41:08,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 455 transitions, 4901 flow, removed 15 selfloop flow, removed 22 redundant places. [2022-11-18 18:41:08,986 INFO L231 Difference]: Finished difference. Result has 334 places, 382 transitions, 4255 flow [2022-11-18 18:41:08,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4255, PETRI_PLACES=334, PETRI_TRANSITIONS=382} [2022-11-18 18:41:08,987 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 179 predicate places. [2022-11-18 18:41:08,988 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 382 transitions, 4255 flow [2022-11-18 18:41:08,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:08,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:08,989 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] [2022-11-18 18:41:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:41:08,989 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1773100190, now seen corresponding path program 4 times [2022-11-18 18:41:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:08,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61980962] [2022-11-18 18:41:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:08,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:10,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61980962] [2022-11-18 18:41:10,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61980962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:10,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:10,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:10,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974381339] [2022-11-18 18:41:10,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:10,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:10,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:10,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:10,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:10,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:10,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 382 transitions, 4255 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:10,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:10,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:10,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:12,339 INFO L130 PetriNetUnfolder]: 2990/5979 cut-off events. [2022-11-18 18:41:12,339 INFO L131 PetriNetUnfolder]: For 26397/26416 co-relation queries the response was YES. [2022-11-18 18:41:12,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22856 conditions, 5979 events. 2990/5979 cut-off events. For 26397/26416 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 45518 event pairs, 471 based on Foata normal form. 10/5961 useless extension candidates. Maximal degree in co-relation 22781. Up to 1841 conditions per place. [2022-11-18 18:41:12,384 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 219 selfloop transitions, 145 changer transitions 10/467 dead transitions. [2022-11-18 18:41:12,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 467 transitions, 5618 flow [2022-11-18 18:41:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 18:41:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 18:41:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3198 transitions. [2022-11-18 18:41:12,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.633769322235434 [2022-11-18 18:41:12,390 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3198 transitions. [2022-11-18 18:41:12,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3198 transitions. [2022-11-18 18:41:12,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:12,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3198 transitions. [2022-11-18 18:41:12,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.27586206896552) internal successors, (3198), 29 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:12,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:12,407 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:12,407 INFO L175 Difference]: Start difference. First operand has 334 places, 382 transitions, 4255 flow. Second operand 29 states and 3198 transitions. [2022-11-18 18:41:12,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 467 transitions, 5618 flow [2022-11-18 18:41:12,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 467 transitions, 5495 flow, removed 3 selfloop flow, removed 19 redundant places. [2022-11-18 18:41:12,622 INFO L231 Difference]: Finished difference. Result has 351 places, 389 transitions, 4664 flow [2022-11-18 18:41:12,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4664, PETRI_PLACES=351, PETRI_TRANSITIONS=389} [2022-11-18 18:41:12,623 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 196 predicate places. [2022-11-18 18:41:12,623 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 389 transitions, 4664 flow [2022-11-18 18:41:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:12,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:12,624 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] [2022-11-18 18:41:12,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:41:12,625 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash -403227108, now seen corresponding path program 5 times [2022-11-18 18:41:12,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:12,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204222632] [2022-11-18 18:41:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:12,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:13,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204222632] [2022-11-18 18:41:13,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204222632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:13,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:13,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471889128] [2022-11-18 18:41:13,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:13,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:13,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:13,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 389 transitions, 4664 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:13,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:13,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:13,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:16,312 INFO L130 PetriNetUnfolder]: 2981/5929 cut-off events. [2022-11-18 18:41:16,312 INFO L131 PetriNetUnfolder]: For 28204/28223 co-relation queries the response was YES. [2022-11-18 18:41:16,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23299 conditions, 5929 events. 2981/5929 cut-off events. For 28204/28223 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 45074 event pairs, 510 based on Foata normal form. 14/5915 useless extension candidates. Maximal degree in co-relation 23217. Up to 1841 conditions per place. [2022-11-18 18:41:16,369 INFO L137 encePairwiseOnDemand]: 142/174 looper letters, 212 selfloop transitions, 143 changer transitions 12/460 dead transitions. [2022-11-18 18:41:16,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 460 transitions, 5811 flow [2022-11-18 18:41:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 18:41:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 18:41:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3205 transitions. [2022-11-18 18:41:16,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6351565596512089 [2022-11-18 18:41:16,375 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3205 transitions. [2022-11-18 18:41:16,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3205 transitions. [2022-11-18 18:41:16,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:16,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3205 transitions. [2022-11-18 18:41:16,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.51724137931035) internal successors, (3205), 29 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:16,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:16,388 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:16,389 INFO L175 Difference]: Start difference. First operand has 351 places, 389 transitions, 4664 flow. Second operand 29 states and 3205 transitions. [2022-11-18 18:41:16,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 460 transitions, 5811 flow [2022-11-18 18:41:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 460 transitions, 5658 flow, removed 26 selfloop flow, removed 21 redundant places. [2022-11-18 18:41:16,611 INFO L231 Difference]: Finished difference. Result has 359 places, 387 transitions, 4787 flow [2022-11-18 18:41:16,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4787, PETRI_PLACES=359, PETRI_TRANSITIONS=387} [2022-11-18 18:41:16,612 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 204 predicate places. [2022-11-18 18:41:16,612 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 387 transitions, 4787 flow [2022-11-18 18:41:16,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:16,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:16,613 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] [2022-11-18 18:41:16,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:41:16,613 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1264021138, now seen corresponding path program 6 times [2022-11-18 18:41:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:16,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029515829] [2022-11-18 18:41:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:18,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:18,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029515829] [2022-11-18 18:41:18,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029515829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:18,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:18,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-18 18:41:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247717275] [2022-11-18 18:41:18,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:18,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 18:41:18,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 18:41:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:41:18,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-18 18:41:18,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 387 transitions, 4787 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:18,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:18,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-18 18:41:18,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:21,839 INFO L130 PetriNetUnfolder]: 3579/6946 cut-off events. [2022-11-18 18:41:21,840 INFO L131 PetriNetUnfolder]: For 33781/33800 co-relation queries the response was YES. [2022-11-18 18:41:21,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27195 conditions, 6946 events. 3579/6946 cut-off events. For 33781/33800 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 54158 event pairs, 487 based on Foata normal form. 48/6961 useless extension candidates. Maximal degree in co-relation 27114. Up to 1873 conditions per place. [2022-11-18 18:41:21,898 INFO L137 encePairwiseOnDemand]: 142/174 looper letters, 286 selfloop transitions, 218 changer transitions 3/594 dead transitions. [2022-11-18 18:41:21,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 594 transitions, 7132 flow [2022-11-18 18:41:21,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 18:41:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 18:41:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3823 transitions. [2022-11-18 18:41:21,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5938179558869214 [2022-11-18 18:41:21,907 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3823 transitions. [2022-11-18 18:41:21,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3823 transitions. [2022-11-18 18:41:21,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:21,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3823 transitions. [2022-11-18 18:41:21,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 103.32432432432432) internal successors, (3823), 37 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:21,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 174.0) internal successors, (6612), 38 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:21,923 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 174.0) internal successors, (6612), 38 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:21,923 INFO L175 Difference]: Start difference. First operand has 359 places, 387 transitions, 4787 flow. Second operand 37 states and 3823 transitions. [2022-11-18 18:41:21,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 594 transitions, 7132 flow [2022-11-18 18:41:22,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 594 transitions, 6921 flow, removed 18 selfloop flow, removed 25 redundant places. [2022-11-18 18:41:22,156 INFO L231 Difference]: Finished difference. Result has 376 places, 416 transitions, 5604 flow [2022-11-18 18:41:22,157 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5604, PETRI_PLACES=376, PETRI_TRANSITIONS=416} [2022-11-18 18:41:22,157 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 221 predicate places. [2022-11-18 18:41:22,157 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 416 transitions, 5604 flow [2022-11-18 18:41:22,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:22,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:22,157 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] [2022-11-18 18:41:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 18:41:22,158 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1846348922, now seen corresponding path program 7 times [2022-11-18 18:41:22,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:22,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131773056] [2022-11-18 18:41:22,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:22,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:24,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131773056] [2022-11-18 18:41:24,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131773056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:41:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462742938] [2022-11-18 18:41:24,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:41:24,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:24,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:24,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:41:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:41:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:41:26,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:41:26,116 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 18:41:26,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-11-18 18:41:26,310 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 18:41:26,311 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 26 treesize of output 10 [2022-11-18 18:41:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:26,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:26,791 INFO L321 Elim1Store]: treesize reduction 15, result has 82.4 percent of original size [2022-11-18 18:41:26,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 139 [2022-11-18 18:41:26,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:41:26,810 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 66 treesize of output 50 [2022-11-18 18:41:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:28,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462742938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:28,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:41:28,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 56 [2022-11-18 18:41:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519117234] [2022-11-18 18:41:28,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:28,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 18:41:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 18:41:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2776, Unknown=2, NotChecked=0, Total=3080 [2022-11-18 18:41:28,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-18 18:41:28,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 416 transitions, 5604 flow. Second operand has 56 states, 56 states have (on average 97.44642857142857) internal successors, (5457), 56 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:28,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:28,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-18 18:41:28,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:34,113 INFO L130 PetriNetUnfolder]: 3459/6660 cut-off events. [2022-11-18 18:41:34,114 INFO L131 PetriNetUnfolder]: For 39221/39240 co-relation queries the response was YES. [2022-11-18 18:41:34,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28066 conditions, 6660 events. 3459/6660 cut-off events. For 39221/39240 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 51211 event pairs, 528 based on Foata normal form. 40/6670 useless extension candidates. Maximal degree in co-relation 27982. Up to 1763 conditions per place. [2022-11-18 18:41:34,207 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 268 selfloop transitions, 220 changer transitions 3/578 dead transitions. [2022-11-18 18:41:34,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 578 transitions, 7478 flow [2022-11-18 18:41:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 18:41:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 18:41:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3792 transitions. [2022-11-18 18:41:34,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5890027958993477 [2022-11-18 18:41:34,216 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3792 transitions. [2022-11-18 18:41:34,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3792 transitions. [2022-11-18 18:41:34,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:34,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3792 transitions. [2022-11-18 18:41:34,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 102.48648648648648) internal successors, (3792), 37 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:34,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 174.0) internal successors, (6612), 38 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:34,239 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 174.0) internal successors, (6612), 38 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:34,239 INFO L175 Difference]: Start difference. First operand has 376 places, 416 transitions, 5604 flow. Second operand 37 states and 3792 transitions. [2022-11-18 18:41:34,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 578 transitions, 7478 flow [2022-11-18 18:41:34,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 578 transitions, 7351 flow, removed 28 selfloop flow, removed 18 redundant places. [2022-11-18 18:41:34,602 INFO L231 Difference]: Finished difference. Result has 398 places, 419 transitions, 6045 flow [2022-11-18 18:41:34,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=6045, PETRI_PLACES=398, PETRI_TRANSITIONS=419} [2022-11-18 18:41:34,603 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 243 predicate places. [2022-11-18 18:41:34,603 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 419 transitions, 6045 flow [2022-11-18 18:41:34,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 97.44642857142857) internal successors, (5457), 56 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:34,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:34,605 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] [2022-11-18 18:41:34,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:41:34,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fde419-cfcc-4f18-b7cb-b835da560f1b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-18 18:41:34,811 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1689800454, now seen corresponding path program 8 times [2022-11-18 18:41:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:34,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662509957] [2022-11-18 18:41:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:34,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662509957] [2022-11-18 18:41:35,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662509957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:35,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:35,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121383029] [2022-11-18 18:41:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:35,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:35,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:35,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:35,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 419 transitions, 6045 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:35,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:35,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:35,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:39,039 INFO L130 PetriNetUnfolder]: 3491/6816 cut-off events. [2022-11-18 18:41:39,039 INFO L131 PetriNetUnfolder]: For 49251/49270 co-relation queries the response was YES. [2022-11-18 18:41:39,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30033 conditions, 6816 events. 3491/6816 cut-off events. For 49251/49270 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 53157 event pairs, 935 based on Foata normal form. 16/6789 useless extension candidates. Maximal degree in co-relation 29948. Up to 2528 conditions per place. [2022-11-18 18:41:39,094 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 236 selfloop transitions, 162 changer transitions 5/496 dead transitions. [2022-11-18 18:41:39,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 496 transitions, 7543 flow [2022-11-18 18:41:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:41:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 18:41:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2999 transitions. [2022-11-18 18:41:39,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6383567475521499 [2022-11-18 18:41:39,101 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2999 transitions. [2022-11-18 18:41:39,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2999 transitions. [2022-11-18 18:41:39,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:39,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2999 transitions. [2022-11-18 18:41:39,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.07407407407408) internal successors, (2999), 27 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:39,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:39,114 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:39,115 INFO L175 Difference]: Start difference. First operand has 398 places, 419 transitions, 6045 flow. Second operand 27 states and 2999 transitions. [2022-11-18 18:41:39,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 496 transitions, 7543 flow [2022-11-18 18:41:39,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 496 transitions, 7044 flow, removed 13 selfloop flow, removed 34 redundant places. [2022-11-18 18:41:39,441 INFO L231 Difference]: Finished difference. Result has 394 places, 432 transitions, 6296 flow [2022-11-18 18:41:39,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6296, PETRI_PLACES=394, PETRI_TRANSITIONS=432} [2022-11-18 18:41:39,441 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 239 predicate places. [2022-11-18 18:41:39,441 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 432 transitions, 6296 flow [2022-11-18 18:41:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:39,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:39,442 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] [2022-11-18 18:41:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 18:41:39,442 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1387030202, now seen corresponding path program 9 times [2022-11-18 18:41:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:39,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222106394] [2022-11-18 18:41:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:40,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222106394] [2022-11-18 18:41:40,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222106394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:40,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:40,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028549766] [2022-11-18 18:41:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:40,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:40,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:40,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 432 transitions, 6296 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:40,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:40,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:40,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:42,426 INFO L130 PetriNetUnfolder]: 3470/6790 cut-off events. [2022-11-18 18:41:42,427 INFO L131 PetriNetUnfolder]: For 43401/43420 co-relation queries the response was YES. [2022-11-18 18:41:42,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28875 conditions, 6790 events. 3470/6790 cut-off events. For 43401/43420 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 52929 event pairs, 917 based on Foata normal form. 20/6766 useless extension candidates. Maximal degree in co-relation 28787. Up to 2528 conditions per place. [2022-11-18 18:41:42,513 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 246 selfloop transitions, 146 changer transitions 7/492 dead transitions. [2022-11-18 18:41:42,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 492 transitions, 7246 flow [2022-11-18 18:41:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:41:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 18:41:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2889 transitions. [2022-11-18 18:41:42,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6385941644562334 [2022-11-18 18:41:42,517 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2889 transitions. [2022-11-18 18:41:42,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2889 transitions. [2022-11-18 18:41:42,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:42,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2889 transitions. [2022-11-18 18:41:42,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.11538461538461) internal successors, (2889), 26 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:42,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:42,529 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:42,529 INFO L175 Difference]: Start difference. First operand has 394 places, 432 transitions, 6296 flow. Second operand 26 states and 2889 transitions. [2022-11-18 18:41:42,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 492 transitions, 7246 flow [2022-11-18 18:41:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 492 transitions, 7009 flow, removed 11 selfloop flow, removed 21 redundant places. [2022-11-18 18:41:42,806 INFO L231 Difference]: Finished difference. Result has 401 places, 427 transitions, 6231 flow [2022-11-18 18:41:42,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5891, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6231, PETRI_PLACES=401, PETRI_TRANSITIONS=427} [2022-11-18 18:41:42,807 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 246 predicate places. [2022-11-18 18:41:42,807 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 427 transitions, 6231 flow [2022-11-18 18:41:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:42,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:42,808 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] [2022-11-18 18:41:42,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 18:41:42,809 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1944326404, now seen corresponding path program 6 times [2022-11-18 18:41:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:42,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350126621] [2022-11-18 18:41:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:42,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350126621] [2022-11-18 18:41:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350126621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547471595] [2022-11-18 18:41:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:43,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:43,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 427 transitions, 6231 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:43,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:43,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:43,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:46,007 INFO L130 PetriNetUnfolder]: 3484/6781 cut-off events. [2022-11-18 18:41:46,007 INFO L131 PetriNetUnfolder]: For 46129/46148 co-relation queries the response was YES. [2022-11-18 18:41:46,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29166 conditions, 6781 events. 3484/6781 cut-off events. For 46129/46148 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 52549 event pairs, 960 based on Foata normal form. 18/6755 useless extension candidates. Maximal degree in co-relation 29076. Up to 2528 conditions per place. [2022-11-18 18:41:46,095 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 229 selfloop transitions, 176 changer transitions 1/499 dead transitions. [2022-11-18 18:41:46,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 499 transitions, 7554 flow [2022-11-18 18:41:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:41:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 18:41:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3016 transitions. [2022-11-18 18:41:46,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2022-11-18 18:41:46,100 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3016 transitions. [2022-11-18 18:41:46,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3016 transitions. [2022-11-18 18:41:46,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:46,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3016 transitions. [2022-11-18 18:41:46,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.70370370370371) internal successors, (3016), 27 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:46,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:46,112 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:46,112 INFO L175 Difference]: Start difference. First operand has 401 places, 427 transitions, 6231 flow. Second operand 27 states and 3016 transitions. [2022-11-18 18:41:46,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 499 transitions, 7554 flow [2022-11-18 18:41:46,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 499 transitions, 7328 flow, removed 2 selfloop flow, removed 20 redundant places. [2022-11-18 18:41:46,451 INFO L231 Difference]: Finished difference. Result has 414 places, 439 transitions, 6789 flow [2022-11-18 18:41:46,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6789, PETRI_PLACES=414, PETRI_TRANSITIONS=439} [2022-11-18 18:41:46,452 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 259 predicate places. [2022-11-18 18:41:46,452 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 439 transitions, 6789 flow [2022-11-18 18:41:46,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:46,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:46,453 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] [2022-11-18 18:41:46,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 18:41:46,454 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1675604162, now seen corresponding path program 10 times [2022-11-18 18:41:46,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:46,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766217112] [2022-11-18 18:41:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:46,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:47,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766217112] [2022-11-18 18:41:47,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766217112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:47,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:47,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-18 18:41:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309666565] [2022-11-18 18:41:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:47,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:41:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:41:47,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:41:47,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:47,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 439 transitions, 6789 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:47,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:47,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:47,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:50,483 INFO L130 PetriNetUnfolder]: 3766/7290 cut-off events. [2022-11-18 18:41:50,483 INFO L131 PetriNetUnfolder]: For 50401/50420 co-relation queries the response was YES. [2022-11-18 18:41:50,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31836 conditions, 7290 events. 3766/7290 cut-off events. For 50401/50420 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 57195 event pairs, 829 based on Foata normal form. 42/7289 useless extension candidates. Maximal degree in co-relation 31740. Up to 2236 conditions per place. [2022-11-18 18:41:50,600 INFO L137 encePairwiseOnDemand]: 142/174 looper letters, 268 selfloop transitions, 209 changer transitions 0/570 dead transitions. [2022-11-18 18:41:50,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 570 transitions, 8615 flow [2022-11-18 18:41:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 18:41:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 18:41:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3580 transitions. [2022-11-18 18:41:50,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6429597701149425 [2022-11-18 18:41:50,607 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3580 transitions. [2022-11-18 18:41:50,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3580 transitions. [2022-11-18 18:41:50,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:50,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3580 transitions. [2022-11-18 18:41:50,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 111.875) internal successors, (3580), 32 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:50,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:50,625 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:50,625 INFO L175 Difference]: Start difference. First operand has 414 places, 439 transitions, 6789 flow. Second operand 32 states and 3580 transitions. [2022-11-18 18:41:50,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 570 transitions, 8615 flow [2022-11-18 18:41:50,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 570 transitions, 8380 flow, removed 11 selfloop flow, removed 19 redundant places. [2022-11-18 18:41:50,992 INFO L231 Difference]: Finished difference. Result has 430 places, 457 transitions, 7360 flow [2022-11-18 18:41:50,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7360, PETRI_PLACES=430, PETRI_TRANSITIONS=457} [2022-11-18 18:41:50,993 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 275 predicate places. [2022-11-18 18:41:50,993 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 457 transitions, 7360 flow [2022-11-18 18:41:50,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:50,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:50,994 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] [2022-11-18 18:41:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 18:41:50,994 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:50,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1880465734, now seen corresponding path program 11 times [2022-11-18 18:41:50,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:50,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087542141] [2022-11-18 18:41:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:50,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:52,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:52,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087542141] [2022-11-18 18:41:52,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087542141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:52,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:52,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-18 18:41:52,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672238279] [2022-11-18 18:41:52,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:52,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:41:52,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:41:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:41:52,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-11-18 18:41:52,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 457 transitions, 7360 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:52,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:52,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-11-18 18:41:52,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:41:54,949 INFO L130 PetriNetUnfolder]: 3751/7316 cut-off events. [2022-11-18 18:41:54,949 INFO L131 PetriNetUnfolder]: For 55016/55035 co-relation queries the response was YES. [2022-11-18 18:41:55,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32798 conditions, 7316 events. 3751/7316 cut-off events. For 55016/55035 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 58011 event pairs, 977 based on Foata normal form. 14/7283 useless extension candidates. Maximal degree in co-relation 32699. Up to 2904 conditions per place. [2022-11-18 18:41:55,071 INFO L137 encePairwiseOnDemand]: 143/174 looper letters, 228 selfloop transitions, 193 changer transitions 0/514 dead transitions. [2022-11-18 18:41:55,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 514 transitions, 8414 flow [2022-11-18 18:41:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:41:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 18:41:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2889 transitions. [2022-11-18 18:41:55,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6385941644562334 [2022-11-18 18:41:55,077 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2889 transitions. [2022-11-18 18:41:55,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2889 transitions. [2022-11-18 18:41:55,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:41:55,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2889 transitions. [2022-11-18 18:41:55,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.11538461538461) internal successors, (2889), 26 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:55,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:55,092 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:55,092 INFO L175 Difference]: Start difference. First operand has 430 places, 457 transitions, 7360 flow. Second operand 26 states and 2889 transitions. [2022-11-18 18:41:55,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 514 transitions, 8414 flow [2022-11-18 18:41:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 514 transitions, 8075 flow, removed 14 selfloop flow, removed 24 redundant places. [2022-11-18 18:41:55,531 INFO L231 Difference]: Finished difference. Result has 432 places, 455 transitions, 7395 flow [2022-11-18 18:41:55,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7395, PETRI_PLACES=432, PETRI_TRANSITIONS=455} [2022-11-18 18:41:55,532 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 277 predicate places. [2022-11-18 18:41:55,532 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 455 transitions, 7395 flow [2022-11-18 18:41:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:55,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:41:55,533 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] [2022-11-18 18:41:55,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-18 18:41:55,533 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:41:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1874832502, now seen corresponding path program 12 times [2022-11-18 18:41:55,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:55,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848768495] [2022-11-18 18:41:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 18:41:57,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:57,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848768495] [2022-11-18 18:41:57,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848768495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:41:57,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:41:57,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-18 18:41:57,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400089627] [2022-11-18 18:41:57,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:41:57,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 18:41:57,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 18:41:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:41:57,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-11-18 18:41:57,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 455 transitions, 7395 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:57,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:41:57,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-11-18 18:41:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:42:00,587 INFO L130 PetriNetUnfolder]: 3794/7375 cut-off events. [2022-11-18 18:42:00,588 INFO L131 PetriNetUnfolder]: For 56026/56045 co-relation queries the response was YES. [2022-11-18 18:42:00,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32979 conditions, 7375 events. 3794/7375 cut-off events. For 56026/56045 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 58271 event pairs, 1013 based on Foata normal form. 20/7349 useless extension candidates. Maximal degree in co-relation 32883. Up to 2904 conditions per place. [2022-11-18 18:42:00,703 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 259 selfloop transitions, 188 changer transitions 3/540 dead transitions. [2022-11-18 18:42:00,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 540 transitions, 8957 flow [2022-11-18 18:42:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 18:42:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-18 18:42:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2754 transitions. [2022-11-18 18:42:00,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6087533156498673 [2022-11-18 18:42:00,708 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2754 transitions. [2022-11-18 18:42:00,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2754 transitions. [2022-11-18 18:42:00,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:42:00,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2754 transitions. [2022-11-18 18:42:00,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.92307692307692) internal successors, (2754), 26 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:00,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:00,719 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:00,719 INFO L175 Difference]: Start difference. First operand has 432 places, 455 transitions, 7395 flow. Second operand 26 states and 2754 transitions. [2022-11-18 18:42:00,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 540 transitions, 8957 flow [2022-11-18 18:42:01,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 540 transitions, 8716 flow, removed 0 selfloop flow, removed 21 redundant places. [2022-11-18 18:42:01,148 INFO L231 Difference]: Finished difference. Result has 442 places, 474 transitions, 8025 flow [2022-11-18 18:42:01,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7158, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8025, PETRI_PLACES=442, PETRI_TRANSITIONS=474} [2022-11-18 18:42:01,150 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 287 predicate places. [2022-11-18 18:42:01,150 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 474 transitions, 8025 flow [2022-11-18 18:42:01,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:01,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:42:01,151 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] [2022-11-18 18:42:01,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 18:42:01,151 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:42:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1613010200, now seen corresponding path program 13 times [2022-11-18 18:42:01,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:01,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707326576] [2022-11-18 18:42:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:01,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat