./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:44:42,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:44:42,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:44:42,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:44:42,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:44:42,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:44:42,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:44:42,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:44:42,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:44:42,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:44:42,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:44:42,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:44:42,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:44:42,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:44:42,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:44:42,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:44:42,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:44:42,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:44:42,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:44:42,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:44:42,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:44:42,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:44:42,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:44:42,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:44:42,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:44:42,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:44:42,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:44:42,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:44:42,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:44:42,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:44:42,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:44:42,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:44:42,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:44:42,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:44:42,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:44:42,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:44:42,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:44:42,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:44:42,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:44:42,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:44:42,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:44:42,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:44:42,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:44:42,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:44:42,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:44:42,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:44:42,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:44:42,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:44:42,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:44:42,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:44:42,514 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:44:42,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:44:42,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:44:42,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:44:42,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:44:42,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:44:42,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:44:42,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:44:42,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:44:42,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:44:42,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:44:42,519 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:44:42,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:44:42,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:44:42,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:44:42,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:44:42,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:44:42,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:44:42,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:44:42,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:44:42,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:44:42,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:44:42,523 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:44:42,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:44:42,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:44:42,524 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_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-11-16 12:44:42,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:44:42,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:44:42,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:44:42,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:44:42,973 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:44:42,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-16 12:44:43,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/data/2d225ee76/b5958be98b1a48b8b077272e198099d1/FLAG895d31fa2 [2022-11-16 12:44:43,725 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:44:43,728 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-16 12:44:43,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/data/2d225ee76/b5958be98b1a48b8b077272e198099d1/FLAG895d31fa2 [2022-11-16 12:44:44,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/data/2d225ee76/b5958be98b1a48b8b077272e198099d1 [2022-11-16 12:44:44,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:44:44,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:44:44,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:44:44,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:44:44,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:44:44,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a34f457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44, skipping insertion in model container [2022-11-16 12:44:44,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:44:44,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:44:44,297 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-16 12:44:44,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:44:44,309 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:44:44,329 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-16 12:44:44,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:44:44,344 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:44:44,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44 WrapperNode [2022-11-16 12:44:44,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:44:44,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:44:44,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:44:44,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:44:44,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,383 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-11-16 12:44:44,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:44:44,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:44:44,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:44:44,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:44:44,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:44:44,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:44:44,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:44:44,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:44:44,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (1/1) ... [2022-11-16 12:44:44,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:44:44,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:44,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:44:44,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:44:44,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:44:44,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:44:44,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:44:44,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:44:44,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:44:44,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:44:44,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:44:44,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:44:44,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:44:44,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:44:44,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:44:44,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:44:44,512 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:44:44,622 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:44:44,626 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:44:44,889 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:44:44,897 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:44:44,897 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:44:44,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:44:44 BoogieIcfgContainer [2022-11-16 12:44:44,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:44:44,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:44:44,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:44:44,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:44:44,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:44:44" (1/3) ... [2022-11-16 12:44:44,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b609f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:44:44, skipping insertion in model container [2022-11-16 12:44:44,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:44" (2/3) ... [2022-11-16 12:44:44,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b609f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:44:44, skipping insertion in model container [2022-11-16 12:44:44,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:44:44" (3/3) ... [2022-11-16 12:44:44,911 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-11-16 12:44:44,921 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:44:44,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:44:44,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:44:44,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:44:45,080 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:44:45,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-16 12:44:45,250 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-16 12:44:45,253 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:44:45,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-16 12:44:45,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-16 12:44:45,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-16 12:44:45,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:44:45,310 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;@1d93cbc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:44:45,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:44:45,400 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-16 12:44:45,400 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:44:45,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:45,424 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] [2022-11-16 12:44:45,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1149725056, now seen corresponding path program 1 times [2022-11-16 12:44:45,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983173002] [2022-11-16 12:44:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:45,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:45,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983173002] [2022-11-16 12:44:45,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983173002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:45,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:44:45,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:44:45,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023740532] [2022-11-16 12:44:45,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:45,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:44:45,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:44:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:44:45,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-11-16 12:44:45,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:45,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:45,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-11-16 12:44:45,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:45,970 INFO L130 PetriNetUnfolder]: 2/69 cut-off events. [2022-11-16 12:44:45,970 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:44:45,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-16 12:44:45,972 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-16 12:44:45,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-11-16 12:44:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:44:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:44:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-11-16 12:44:45,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-11-16 12:44:45,990 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-11-16 12:44:45,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-11-16 12:44:45,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:45,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-11-16 12:44:45,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,004 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,011 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-11-16 12:44:46,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-11-16 12:44:46,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:44:46,021 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-16 12:44:46,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-16 12:44:46,031 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-16 12:44:46,032 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-16 12:44:46,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:46,034 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] [2022-11-16 12:44:46,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:44:46,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash 807026320, now seen corresponding path program 1 times [2022-11-16 12:44:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:46,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266358964] [2022-11-16 12:44:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:46,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266358964] [2022-11-16 12:44:46,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266358964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:46,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:44:46,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:44:46,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506044324] [2022-11-16 12:44:46,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:44:46,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:46,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:44:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:44:46,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-16 12:44:46,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:46,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-16 12:44:46,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:46,923 INFO L130 PetriNetUnfolder]: 61/207 cut-off events. [2022-11-16 12:44:46,923 INFO L131 PetriNetUnfolder]: For 10/22 co-relation queries the response was YES. [2022-11-16 12:44:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 207 events. 61/207 cut-off events. For 10/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 706 event pairs, 24 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 346. Up to 84 conditions per place. [2022-11-16 12:44:46,926 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-11-16 12:44:46,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-11-16 12:44:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:44:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:44:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-11-16 12:44:46,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-11-16 12:44:46,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-11-16 12:44:46,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-11-16 12:44:46,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:46,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-11-16 12:44:46,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,938 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-11-16 12:44:46,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-11-16 12:44:46,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:44:46,941 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-11-16 12:44:46,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-11-16 12:44:46,942 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-11-16 12:44:46,943 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-11-16 12:44:46,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:46,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:46,944 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] [2022-11-16 12:44:46,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:44:46,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:46,945 INFO L85 PathProgramCache]: Analyzing trace with hash -542410267, now seen corresponding path program 1 times [2022-11-16 12:44:46,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:46,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102099826] [2022-11-16 12:44:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:47,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102099826] [2022-11-16 12:44:47,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102099826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:47,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:44:47,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:44:47,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656255978] [2022-11-16 12:44:47,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:47,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:44:47,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:44:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:44:47,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-16 12:44:47,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:47,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-16 12:44:47,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:47,425 INFO L130 PetriNetUnfolder]: 53/200 cut-off events. [2022-11-16 12:44:47,425 INFO L131 PetriNetUnfolder]: For 20/35 co-relation queries the response was YES. [2022-11-16 12:44:47,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 200 events. 53/200 cut-off events. For 20/35 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 711 event pairs, 7 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 364. Up to 58 conditions per place. [2022-11-16 12:44:47,429 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 12 changer transitions 4/92 dead transitions. [2022-11-16 12:44:47,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 92 transitions, 324 flow [2022-11-16 12:44:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:44:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:44:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 420 transitions. [2022-11-16 12:44:47,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-16 12:44:47,433 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 420 transitions. [2022-11-16 12:44:47,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 420 transitions. [2022-11-16 12:44:47,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:47,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 420 transitions. [2022-11-16 12:44:47,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,439 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,439 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 7 states and 420 transitions. [2022-11-16 12:44:47,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 92 transitions, 324 flow [2022-11-16 12:44:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 311 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-16 12:44:47,443 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 219 flow [2022-11-16 12:44:47,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-11-16 12:44:47,445 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-11-16 12:44:47,445 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 219 flow [2022-11-16 12:44:47,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:47,446 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] [2022-11-16 12:44:47,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:44:47,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash 920803105, now seen corresponding path program 2 times [2022-11-16 12:44:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:47,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991170398] [2022-11-16 12:44:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:47,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:47,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991170398] [2022-11-16 12:44:47,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991170398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:47,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:44:47,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:44:47,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287340375] [2022-11-16 12:44:47,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:47,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:44:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:44:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:44:47,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-16 12:44:47,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:47,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-16 12:44:47,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:47,785 INFO L130 PetriNetUnfolder]: 50/198 cut-off events. [2022-11-16 12:44:47,785 INFO L131 PetriNetUnfolder]: For 96/102 co-relation queries the response was YES. [2022-11-16 12:44:47,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 198 events. 50/198 cut-off events. For 96/102 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 699 event pairs, 14 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 425. Up to 46 conditions per place. [2022-11-16 12:44:47,788 INFO L137 encePairwiseOnDemand]: 73/84 looper letters, 31 selfloop transitions, 17 changer transitions 4/95 dead transitions. [2022-11-16 12:44:47,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 400 flow [2022-11-16 12:44:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:44:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:44:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 418 transitions. [2022-11-16 12:44:47,791 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7108843537414966 [2022-11-16 12:44:47,791 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 418 transitions. [2022-11-16 12:44:47,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 418 transitions. [2022-11-16 12:44:47,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:47,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 418 transitions. [2022-11-16 12:44:47,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.714285714285715) internal successors, (418), 7 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,797 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,797 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 219 flow. Second operand 7 states and 418 transitions. [2022-11-16 12:44:47,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 400 flow [2022-11-16 12:44:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:44:47,803 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 317 flow [2022-11-16 12:44:47,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2022-11-16 12:44:47,804 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-16 12:44:47,805 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 317 flow [2022-11-16 12:44:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:47,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:47,806 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] [2022-11-16 12:44:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:44:47,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 201255641, now seen corresponding path program 1 times [2022-11-16 12:44:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:47,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174307424] [2022-11-16 12:44:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:48,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:48,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174307424] [2022-11-16 12:44:48,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174307424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873283222] [2022-11-16 12:44:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:48,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:48,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:48,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:44:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:44:48,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:48,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:48,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873283222] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:48,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:48,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-16 12:44:48,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020167257] [2022-11-16 12:44:48,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:48,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:44:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:48,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:44:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:44:48,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-16 12:44:48,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:48,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:48,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-16 12:44:48,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:48,857 INFO L130 PetriNetUnfolder]: 49/229 cut-off events. [2022-11-16 12:44:48,857 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2022-11-16 12:44:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 229 events. 49/229 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 787 event pairs, 17 based on Foata normal form. 7/233 useless extension candidates. Maximal degree in co-relation 599. Up to 79 conditions per place. [2022-11-16 12:44:48,861 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 48 selfloop transitions, 12 changer transitions 1/104 dead transitions. [2022-11-16 12:44:48,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 559 flow [2022-11-16 12:44:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:44:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:44:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-11-16 12:44:48,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-11-16 12:44:48,863 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-11-16 12:44:48,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-11-16 12:44:48,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:48,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-11-16 12:44:48,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:48,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:48,867 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:48,867 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 317 flow. Second operand 6 states and 365 transitions. [2022-11-16 12:44:48,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 559 flow [2022-11-16 12:44:48,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-16 12:44:48,875 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 380 flow [2022-11-16 12:44:48,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2022-11-16 12:44:48,876 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-11-16 12:44:48,877 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 380 flow [2022-11-16 12:44:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:48,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:48,878 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] [2022-11-16 12:44:48,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:49,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-11-16 12:44:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:49,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924831865] [2022-11-16 12:44:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:49,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:49,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924831865] [2022-11-16 12:44:49,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924831865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:49,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:44:49,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:44:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876384533] [2022-11-16 12:44:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:44:49,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:44:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:44:49,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-16 12:44:49,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:49,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:49,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-16 12:44:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:49,452 INFO L130 PetriNetUnfolder]: 50/222 cut-off events. [2022-11-16 12:44:49,452 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2022-11-16 12:44:49,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 222 events. 50/222 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 765 event pairs, 13 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 634. Up to 60 conditions per place. [2022-11-16 12:44:49,456 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 11 changer transitions 3/98 dead transitions. [2022-11-16 12:44:49,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 567 flow [2022-11-16 12:44:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:44:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:44:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 414 transitions. [2022-11-16 12:44:49,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2022-11-16 12:44:49,458 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 414 transitions. [2022-11-16 12:44:49,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 414 transitions. [2022-11-16 12:44:49,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:49,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 414 transitions. [2022-11-16 12:44:49,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:49,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:49,462 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:49,462 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 380 flow. Second operand 7 states and 414 transitions. [2022-11-16 12:44:49,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 567 flow [2022-11-16 12:44:49,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 558 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-16 12:44:49,469 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 417 flow [2022-11-16 12:44:49,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=417, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2022-11-16 12:44:49,470 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2022-11-16 12:44:49,470 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 417 flow [2022-11-16 12:44:49,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:49,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:49,471 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:49,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:44:49,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash -946876456, now seen corresponding path program 1 times [2022-11-16 12:44:49,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:49,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617207080] [2022-11-16 12:44:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:49,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:49,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:49,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617207080] [2022-11-16 12:44:49,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617207080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:49,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879092654] [2022-11-16 12:44:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:49,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:49,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:49,810 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:49,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:44:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:44:49,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:50,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:50,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879092654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:50,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:50,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-11-16 12:44:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059003575] [2022-11-16 12:44:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:44:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:44:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:44:50,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:44:50,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 417 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:50,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:50,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:44:50,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:53,631 INFO L130 PetriNetUnfolder]: 174/589 cut-off events. [2022-11-16 12:44:53,631 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-11-16 12:44:53,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 589 events. 174/589 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3251 event pairs, 4 based on Foata normal form. 24/610 useless extension candidates. Maximal degree in co-relation 1924. Up to 82 conditions per place. [2022-11-16 12:44:53,638 INFO L137 encePairwiseOnDemand]: 65/84 looper letters, 110 selfloop transitions, 150 changer transitions 5/306 dead transitions. [2022-11-16 12:44:53,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 306 transitions, 2396 flow [2022-11-16 12:44:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 12:44:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-16 12:44:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3404 transitions. [2022-11-16 12:44:53,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6536098310291859 [2022-11-16 12:44:53,648 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3404 transitions. [2022-11-16 12:44:53,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3404 transitions. [2022-11-16 12:44:53,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:53,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3404 transitions. [2022-11-16 12:44:53,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.903225806451616) internal successors, (3404), 62 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:53,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:53,673 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:53,673 INFO L175 Difference]: Start difference. First operand has 98 places, 84 transitions, 417 flow. Second operand 62 states and 3404 transitions. [2022-11-16 12:44:53,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 306 transitions, 2396 flow [2022-11-16 12:44:53,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 306 transitions, 2298 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-11-16 12:44:53,689 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 1781 flow [2022-11-16 12:44:53,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1781, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2022-11-16 12:44:53,690 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 105 predicate places. [2022-11-16 12:44:53,690 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 1781 flow [2022-11-16 12:44:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:53,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:53,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:53,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:53,898 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1773717672, now seen corresponding path program 2 times [2022-11-16 12:44:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:53,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506803595] [2022-11-16 12:44:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506803595] [2022-11-16 12:44:54,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506803595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593915305] [2022-11-16 12:44:54,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:44:54,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:54,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:54,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:54,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:44:54,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:44:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:44:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:54,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:44:54,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593915305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:54,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:44:54,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-16 12:44:54,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70708181] [2022-11-16 12:44:54,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:54,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:44:54,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:44:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:44:54,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:44:54,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 1781 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:54,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:54,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:44:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:55,717 INFO L130 PetriNetUnfolder]: 232/733 cut-off events. [2022-11-16 12:44:55,718 INFO L131 PetriNetUnfolder]: For 4824/4824 co-relation queries the response was YES. [2022-11-16 12:44:55,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 733 events. 232/733 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4374 event pairs, 36 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 3256. Up to 426 conditions per place. [2022-11-16 12:44:55,730 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 213 selfloop transitions, 72 changer transitions 4/330 dead transitions. [2022-11-16 12:44:55,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 330 transitions, 3461 flow [2022-11-16 12:44:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:44:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:44:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-16 12:44:55,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-16 12:44:55,734 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-16 12:44:55,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-16 12:44:55,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:55,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-16 12:44:55,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,743 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,743 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 1781 flow. Second operand 18 states and 1004 transitions. [2022-11-16 12:44:55,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 330 transitions, 3461 flow [2022-11-16 12:44:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 330 transitions, 3111 flow, removed 163 selfloop flow, removed 8 redundant places. [2022-11-16 12:44:55,801 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 2343 flow [2022-11-16 12:44:55,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2343, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2022-11-16 12:44:55,802 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 121 predicate places. [2022-11-16 12:44:55,802 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 2343 flow [2022-11-16 12:44:55,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:55,803 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:55,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:56,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1203830056, now seen corresponding path program 3 times [2022-11-16 12:44:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:56,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371270831] [2022-11-16 12:44:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:56,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371270831] [2022-11-16 12:44:56,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371270831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:56,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379038283] [2022-11-16 12:44:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:56,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:56,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:56,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:56,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:44:56,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:44:56,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:44:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:56,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:44:56,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379038283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:56,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:44:56,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-16 12:44:56,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136122579] [2022-11-16 12:44:56,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:56,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:44:56,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:56,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:44:56,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:44:56,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:44:56,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 2343 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:56,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:56,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:44:56,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:57,913 INFO L130 PetriNetUnfolder]: 312/949 cut-off events. [2022-11-16 12:44:57,913 INFO L131 PetriNetUnfolder]: For 5638/5638 co-relation queries the response was YES. [2022-11-16 12:44:57,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4318 conditions, 949 events. 312/949 cut-off events. For 5638/5638 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6113 event pairs, 41 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 4271. Up to 557 conditions per place. [2022-11-16 12:44:57,928 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 271 selfloop transitions, 96 changer transitions 4/412 dead transitions. [2022-11-16 12:44:57,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 412 transitions, 4325 flow [2022-11-16 12:44:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:44:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:44:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2022-11-16 12:44:57,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6604308390022676 [2022-11-16 12:44:57,932 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2022-11-16 12:44:57,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2022-11-16 12:44:57,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:57,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2022-11-16 12:44:57,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:57,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:57,941 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:57,942 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 2343 flow. Second operand 21 states and 1165 transitions. [2022-11-16 12:44:57,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 412 transitions, 4325 flow [2022-11-16 12:44:57,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 412 transitions, 4311 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-16 12:44:58,007 INFO L231 Difference]: Finished difference. Result has 218 places, 357 transitions, 3446 flow [2022-11-16 12:44:58,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3446, PETRI_PLACES=218, PETRI_TRANSITIONS=357} [2022-11-16 12:44:58,009 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 144 predicate places. [2022-11-16 12:44:58,009 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 357 transitions, 3446 flow [2022-11-16 12:44:58,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:58,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:58,010 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:58,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:58,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 186380408, now seen corresponding path program 4 times [2022-11-16 12:44:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:58,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378636768] [2022-11-16 12:44:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:58,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:58,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378636768] [2022-11-16 12:44:58,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378636768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:44:58,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:44:58,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 12:44:58,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143606625] [2022-11-16 12:44:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:44:58,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:44:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:44:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:44:58,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:44:58,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 357 transitions, 3446 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:58,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:58,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:44:58,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:59,018 INFO L130 PetriNetUnfolder]: 356/1063 cut-off events. [2022-11-16 12:44:59,019 INFO L131 PetriNetUnfolder]: For 7309/7309 co-relation queries the response was YES. [2022-11-16 12:44:59,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 1063 events. 356/1063 cut-off events. For 7309/7309 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7029 event pairs, 52 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 5254. Up to 550 conditions per place. [2022-11-16 12:44:59,037 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 263 selfloop transitions, 158 changer transitions 6/468 dead transitions. [2022-11-16 12:44:59,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 468 transitions, 5513 flow [2022-11-16 12:44:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:44:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 12:44:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-11-16 12:44:59,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-11-16 12:44:59,040 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-11-16 12:44:59,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-11-16 12:44:59,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:59,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-11-16 12:44:59,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,045 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,046 INFO L175 Difference]: Start difference. First operand has 218 places, 357 transitions, 3446 flow. Second operand 15 states and 824 transitions. [2022-11-16 12:44:59,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 468 transitions, 5513 flow [2022-11-16 12:44:59,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 468 transitions, 5399 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-11-16 12:44:59,135 INFO L231 Difference]: Finished difference. Result has 234 places, 433 transitions, 4871 flow [2022-11-16 12:44:59,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4871, PETRI_PLACES=234, PETRI_TRANSITIONS=433} [2022-11-16 12:44:59,138 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 160 predicate places. [2022-11-16 12:44:59,138 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 433 transitions, 4871 flow [2022-11-16 12:44:59,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:59,139 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:44:59,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:44:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1350271786, now seen corresponding path program 5 times [2022-11-16 12:44:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:59,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846390242] [2022-11-16 12:44:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846390242] [2022-11-16 12:44:59,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846390242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289322328] [2022-11-16 12:44:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:44:59,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:59,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:59,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:44:59,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:44:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:44:59,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:00,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289322328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:00,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:00,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-11-16 12:45:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844896386] [2022-11-16 12:45:00,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:45:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:45:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:45:00,313 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:00,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 433 transitions, 4871 flow. Second operand has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:00,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:00,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:00,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:01,722 INFO L130 PetriNetUnfolder]: 493/1394 cut-off events. [2022-11-16 12:45:01,722 INFO L131 PetriNetUnfolder]: For 10884/10884 co-relation queries the response was YES. [2022-11-16 12:45:01,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 1394 events. 493/1394 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9767 event pairs, 34 based on Foata normal form. 1/1383 useless extension candidates. Maximal degree in co-relation 7626. Up to 444 conditions per place. [2022-11-16 12:45:01,763 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 202 selfloop transitions, 442 changer transitions 22/707 dead transitions. [2022-11-16 12:45:01,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 707 transitions, 9305 flow [2022-11-16 12:45:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:45:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:45:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1522 transitions. [2022-11-16 12:45:01,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471088435374149 [2022-11-16 12:45:01,773 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1522 transitions. [2022-11-16 12:45:01,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1522 transitions. [2022-11-16 12:45:01,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:01,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1522 transitions. [2022-11-16 12:45:01,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.357142857142854) internal successors, (1522), 28 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:01,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:01,833 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:01,833 INFO L175 Difference]: Start difference. First operand has 234 places, 433 transitions, 4871 flow. Second operand 28 states and 1522 transitions. [2022-11-16 12:45:01,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 707 transitions, 9305 flow [2022-11-16 12:45:02,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 707 transitions, 9131 flow, removed 87 selfloop flow, removed 3 redundant places. [2022-11-16 12:45:02,029 INFO L231 Difference]: Finished difference. Result has 270 places, 636 transitions, 8547 flow [2022-11-16 12:45:02,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8547, PETRI_PLACES=270, PETRI_TRANSITIONS=636} [2022-11-16 12:45:02,031 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 196 predicate places. [2022-11-16 12:45:02,031 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 636 transitions, 8547 flow [2022-11-16 12:45:02,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:02,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:02,033 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:02,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:45:02,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1996851174, now seen corresponding path program 6 times [2022-11-16 12:45:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:02,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369955980] [2022-11-16 12:45:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369955980] [2022-11-16 12:45:02,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369955980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644188068] [2022-11-16 12:45:02,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:45:02,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:02,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:02,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:02,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:45:02,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:45:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:45:02,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:03,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:03,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644188068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:03,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:45:03,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-16 12:45:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745805467] [2022-11-16 12:45:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:45:03,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:03,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:45:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:45:03,170 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:03,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 636 transitions, 8547 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:03,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:03,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:04,936 INFO L130 PetriNetUnfolder]: 648/1770 cut-off events. [2022-11-16 12:45:04,936 INFO L131 PetriNetUnfolder]: For 17440/17440 co-relation queries the response was YES. [2022-11-16 12:45:04,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11260 conditions, 1770 events. 648/1770 cut-off events. For 17440/17440 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13008 event pairs, 57 based on Foata normal form. 1/1750 useless extension candidates. Maximal degree in co-relation 11181. Up to 1097 conditions per place. [2022-11-16 12:45:04,990 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 669 selfloop transitions, 170 changer transitions 4/884 dead transitions. [2022-11-16 12:45:04,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 884 transitions, 14042 flow [2022-11-16 12:45:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:45:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-16 12:45:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-11-16 12:45:05,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-11-16 12:45:05,006 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-11-16 12:45:05,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-11-16 12:45:05,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:05,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-11-16 12:45:05,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:05,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:05,021 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:05,022 INFO L175 Difference]: Start difference. First operand has 270 places, 636 transitions, 8547 flow. Second operand 16 states and 910 transitions. [2022-11-16 12:45:05,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 884 transitions, 14042 flow [2022-11-16 12:45:05,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 884 transitions, 12889 flow, removed 171 selfloop flow, removed 17 redundant places. [2022-11-16 12:45:05,267 INFO L231 Difference]: Finished difference. Result has 268 places, 775 transitions, 10616 flow [2022-11-16 12:45:05,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10616, PETRI_PLACES=268, PETRI_TRANSITIONS=775} [2022-11-16 12:45:05,269 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 194 predicate places. [2022-11-16 12:45:05,269 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 775 transitions, 10616 flow [2022-11-16 12:45:05,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:05,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:05,270 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:05,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:45:05,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1099232000, now seen corresponding path program 7 times [2022-11-16 12:45:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:05,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814571628] [2022-11-16 12:45:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814571628] [2022-11-16 12:45:05,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814571628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96211150] [2022-11-16 12:45:05,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:45:05,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:05,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:05,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:05,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:45:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:45:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:06,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:06,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96211150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:06,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:45:06,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-16 12:45:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283846923] [2022-11-16 12:45:06,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:06,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:45:06,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:45:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:45:06,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:06,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 775 transitions, 10616 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:06,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:06,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:08,061 INFO L130 PetriNetUnfolder]: 754/2051 cut-off events. [2022-11-16 12:45:08,061 INFO L131 PetriNetUnfolder]: For 19063/19063 co-relation queries the response was YES. [2022-11-16 12:45:08,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12880 conditions, 2051 events. 754/2051 cut-off events. For 19063/19063 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15800 event pairs, 82 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 12799. Up to 1421 conditions per place. [2022-11-16 12:45:08,108 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 754 selfloop transitions, 147 changer transitions 4/946 dead transitions. [2022-11-16 12:45:08,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 946 transitions, 14840 flow [2022-11-16 12:45:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:45:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:45:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-11-16 12:45:08,112 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-11-16 12:45:08,112 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-11-16 12:45:08,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-11-16 12:45:08,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:08,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-11-16 12:45:08,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:08,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:08,120 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:08,120 INFO L175 Difference]: Start difference. First operand has 268 places, 775 transitions, 10616 flow. Second operand 18 states and 1006 transitions. [2022-11-16 12:45:08,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 946 transitions, 14840 flow [2022-11-16 12:45:08,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 946 transitions, 14537 flow, removed 133 selfloop flow, removed 7 redundant places. [2022-11-16 12:45:08,401 INFO L231 Difference]: Finished difference. Result has 285 places, 885 transitions, 12648 flow [2022-11-16 12:45:08,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12648, PETRI_PLACES=285, PETRI_TRANSITIONS=885} [2022-11-16 12:45:08,403 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 211 predicate places. [2022-11-16 12:45:08,403 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 885 transitions, 12648 flow [2022-11-16 12:45:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:08,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:08,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:08,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:45:08,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:08,610 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1566346522, now seen corresponding path program 8 times [2022-11-16 12:45:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:08,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62871732] [2022-11-16 12:45:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:08,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:08,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62871732] [2022-11-16 12:45:08,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62871732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145654806] [2022-11-16 12:45:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:45:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:08,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:08,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:08,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:45:08,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:45:08,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:45:08,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:09,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:09,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145654806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:09,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:45:09,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-16 12:45:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995125289] [2022-11-16 12:45:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:09,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:45:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:45:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:45:09,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:09,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 885 transitions, 12648 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:09,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:09,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:09,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:11,125 INFO L130 PetriNetUnfolder]: 863/2328 cut-off events. [2022-11-16 12:45:11,125 INFO L131 PetriNetUnfolder]: For 23712/23712 co-relation queries the response was YES. [2022-11-16 12:45:11,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15320 conditions, 2328 events. 863/2328 cut-off events. For 23712/23712 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18529 event pairs, 87 based on Foata normal form. 1/2295 useless extension candidates. Maximal degree in co-relation 15232. Up to 1642 conditions per place. [2022-11-16 12:45:11,176 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 852 selfloop transitions, 169 changer transitions 4/1066 dead transitions. [2022-11-16 12:45:11,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1066 transitions, 17666 flow [2022-11-16 12:45:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:45:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:45:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-11-16 12:45:11,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-11-16 12:45:11,180 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-11-16 12:45:11,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-11-16 12:45:11,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:11,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-11-16 12:45:11,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:11,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:11,189 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:11,189 INFO L175 Difference]: Start difference. First operand has 285 places, 885 transitions, 12648 flow. Second operand 21 states and 1163 transitions. [2022-11-16 12:45:11,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1066 transitions, 17666 flow [2022-11-16 12:45:11,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1066 transitions, 17236 flow, removed 185 selfloop flow, removed 8 redundant places. [2022-11-16 12:45:11,437 INFO L231 Difference]: Finished difference. Result has 305 places, 1005 transitions, 15083 flow [2022-11-16 12:45:11,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12272, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15083, PETRI_PLACES=305, PETRI_TRANSITIONS=1005} [2022-11-16 12:45:11,439 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 231 predicate places. [2022-11-16 12:45:11,439 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1005 transitions, 15083 flow [2022-11-16 12:45:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:11,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:11,440 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:11,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:45:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:11,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash -613700161, now seen corresponding path program 9 times [2022-11-16 12:45:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:11,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338270905] [2022-11-16 12:45:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:11,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338270905] [2022-11-16 12:45:11,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338270905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508754865] [2022-11-16 12:45:11,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:45:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:11,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:11,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:11,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:45:12,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:45:12,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:12,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:45:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:12,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:12,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508754865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:12,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:12,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-16 12:45:12,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489240525] [2022-11-16 12:45:12,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:12,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:45:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:45:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:45:12,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:12,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1005 transitions, 15083 flow. Second operand has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:12,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:12,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:12,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:14,814 INFO L130 PetriNetUnfolder]: 1033/2762 cut-off events. [2022-11-16 12:45:14,814 INFO L131 PetriNetUnfolder]: For 30374/30388 co-relation queries the response was YES. [2022-11-16 12:45:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18380 conditions, 2762 events. 1033/2762 cut-off events. For 30374/30388 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22873 event pairs, 43 based on Foata normal form. 14/2758 useless extension candidates. Maximal degree in co-relation 18283. Up to 903 conditions per place. [2022-11-16 12:45:14,874 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 791 selfloop transitions, 455 changer transitions 0/1287 dead transitions. [2022-11-16 12:45:14,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1287 transitions, 21280 flow [2022-11-16 12:45:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:45:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 12:45:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1127 transitions. [2022-11-16 12:45:14,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2022-11-16 12:45:14,881 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1127 transitions. [2022-11-16 12:45:14,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1127 transitions. [2022-11-16 12:45:14,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:14,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1127 transitions. [2022-11-16 12:45:14,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.35) internal successors, (1127), 20 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:14,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:14,907 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:14,907 INFO L175 Difference]: Start difference. First operand has 305 places, 1005 transitions, 15083 flow. Second operand 20 states and 1127 transitions. [2022-11-16 12:45:14,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1287 transitions, 21280 flow [2022-11-16 12:45:15,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1287 transitions, 20662 flow, removed 291 selfloop flow, removed 7 redundant places. [2022-11-16 12:45:15,284 INFO L231 Difference]: Finished difference. Result has 326 places, 1163 transitions, 18690 flow [2022-11-16 12:45:15,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18690, PETRI_PLACES=326, PETRI_TRANSITIONS=1163} [2022-11-16 12:45:15,286 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 252 predicate places. [2022-11-16 12:45:15,286 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1163 transitions, 18690 flow [2022-11-16 12:45:15,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:15,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:15,287 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:15,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:15,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:15,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1312073183, now seen corresponding path program 10 times [2022-11-16 12:45:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:15,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946173183] [2022-11-16 12:45:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:15,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946173183] [2022-11-16 12:45:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946173183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329476704] [2022-11-16 12:45:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:45:15,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:15,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:15,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:45:15,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:45:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:45:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:16,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:16,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329476704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:16,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:16,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-16 12:45:16,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600508986] [2022-11-16 12:45:16,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:16,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:45:16,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:45:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:45:16,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:16,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1163 transitions, 18690 flow. Second operand has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:16,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:16,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:16,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:18,333 INFO L130 PetriNetUnfolder]: 1107/2942 cut-off events. [2022-11-16 12:45:18,333 INFO L131 PetriNetUnfolder]: For 42498/42498 co-relation queries the response was YES. [2022-11-16 12:45:18,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 2942 events. 1107/2942 cut-off events. For 42498/42498 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24629 event pairs, 71 based on Foata normal form. 2/2911 useless extension candidates. Maximal degree in co-relation 21261. Up to 1612 conditions per place. [2022-11-16 12:45:18,386 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 930 selfloop transitions, 362 changer transitions 12/1345 dead transitions. [2022-11-16 12:45:18,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1345 transitions, 23894 flow [2022-11-16 12:45:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:45:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:45:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-16 12:45:18,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-16 12:45:18,390 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-16 12:45:18,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-16 12:45:18,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:18,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-16 12:45:18,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:18,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:18,397 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:18,397 INFO L175 Difference]: Start difference. First operand has 326 places, 1163 transitions, 18690 flow. Second operand 18 states and 1004 transitions. [2022-11-16 12:45:18,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1345 transitions, 23894 flow [2022-11-16 12:45:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1345 transitions, 23544 flow, removed 157 selfloop flow, removed 6 redundant places. [2022-11-16 12:45:19,026 INFO L231 Difference]: Finished difference. Result has 344 places, 1238 transitions, 21062 flow [2022-11-16 12:45:19,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=18344, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21062, PETRI_PLACES=344, PETRI_TRANSITIONS=1238} [2022-11-16 12:45:19,027 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 270 predicate places. [2022-11-16 12:45:19,027 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1238 transitions, 21062 flow [2022-11-16 12:45:19,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:19,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:19,028 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:19,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:19,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:19,235 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1339676861, now seen corresponding path program 11 times [2022-11-16 12:45:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197972841] [2022-11-16 12:45:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:19,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:19,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197972841] [2022-11-16 12:45:19,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197972841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:19,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11899932] [2022-11-16 12:45:19,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:45:19,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:19,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:19,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:19,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:45:19,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:45:19,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:45:19,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:19,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11899932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:20,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:20,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-16 12:45:20,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893237261] [2022-11-16 12:45:20,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:20,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:45:20,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:45:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:45:20,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:20,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1238 transitions, 21062 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:20,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:20,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:20,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:23,891 INFO L130 PetriNetUnfolder]: 1477/3889 cut-off events. [2022-11-16 12:45:23,892 INFO L131 PetriNetUnfolder]: For 72823/72823 co-relation queries the response was YES. [2022-11-16 12:45:23,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30669 conditions, 3889 events. 1477/3889 cut-off events. For 72823/72823 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33593 event pairs, 64 based on Foata normal form. 14/3876 useless extension candidates. Maximal degree in co-relation 30556. Up to 992 conditions per place. [2022-11-16 12:45:24,031 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 709 selfloop transitions, 1069 changer transitions 26/1845 dead transitions. [2022-11-16 12:45:24,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1845 transitions, 35908 flow [2022-11-16 12:45:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:45:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 12:45:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2165 transitions. [2022-11-16 12:45:24,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6608669108669109 [2022-11-16 12:45:24,038 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2165 transitions. [2022-11-16 12:45:24,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2165 transitions. [2022-11-16 12:45:24,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:24,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2165 transitions. [2022-11-16 12:45:24,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.51282051282051) internal successors, (2165), 39 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:24,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:24,053 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:24,053 INFO L175 Difference]: Start difference. First operand has 344 places, 1238 transitions, 21062 flow. Second operand 39 states and 2165 transitions. [2022-11-16 12:45:24,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1845 transitions, 35908 flow [2022-11-16 12:45:25,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1845 transitions, 35490 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-11-16 12:45:25,184 INFO L231 Difference]: Finished difference. Result has 392 places, 1662 transitions, 33601 flow [2022-11-16 12:45:25,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20683, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=33601, PETRI_PLACES=392, PETRI_TRANSITIONS=1662} [2022-11-16 12:45:25,186 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 318 predicate places. [2022-11-16 12:45:25,187 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1662 transitions, 33601 flow [2022-11-16 12:45:25,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:25,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:25,188 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:25,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 12:45:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:45:25,392 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 923816933, now seen corresponding path program 12 times [2022-11-16 12:45:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062552453] [2022-11-16 12:45:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:25,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062552453] [2022-11-16 12:45:25,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062552453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:25,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277833030] [2022-11-16 12:45:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:45:25,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:25,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:45:25,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:45:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:25,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:45:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:25,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277833030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:26,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-16 12:45:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079986089] [2022-11-16 12:45:26,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:45:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:45:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:45:26,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:26,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1662 transitions, 33601 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:26,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:26,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:26,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:32,379 INFO L130 PetriNetUnfolder]: 1926/5203 cut-off events. [2022-11-16 12:45:32,379 INFO L131 PetriNetUnfolder]: For 120334/120363 co-relation queries the response was YES. [2022-11-16 12:45:32,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45199 conditions, 5203 events. 1926/5203 cut-off events. For 120334/120363 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47303 event pairs, 27 based on Foata normal form. 43/5240 useless extension candidates. Maximal degree in co-relation 45066. Up to 1189 conditions per place. [2022-11-16 12:45:32,533 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1139 selfloop transitions, 1224 changer transitions 2/2406 dead transitions. [2022-11-16 12:45:32,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2406 transitions, 53111 flow [2022-11-16 12:45:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:45:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-16 12:45:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3928 transitions. [2022-11-16 12:45:32,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586183769282361 [2022-11-16 12:45:32,541 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3928 transitions. [2022-11-16 12:45:32,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3928 transitions. [2022-11-16 12:45:32,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:32,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3928 transitions. [2022-11-16 12:45:32,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.32394366197183) internal successors, (3928), 71 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:32,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:32,562 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:32,563 INFO L175 Difference]: Start difference. First operand has 392 places, 1662 transitions, 33601 flow. Second operand 71 states and 3928 transitions. [2022-11-16 12:45:32,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2406 transitions, 53111 flow [2022-11-16 12:45:34,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2406 transitions, 51897 flow, removed 587 selfloop flow, removed 8 redundant places. [2022-11-16 12:45:34,865 INFO L231 Difference]: Finished difference. Result has 488 places, 2225 transitions, 49344 flow [2022-11-16 12:45:34,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=32691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=751, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=49344, PETRI_PLACES=488, PETRI_TRANSITIONS=2225} [2022-11-16 12:45:34,868 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 414 predicate places. [2022-11-16 12:45:34,868 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 2225 transitions, 49344 flow [2022-11-16 12:45:34,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:34,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:34,869 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:34,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:35,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:45:35,077 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:35,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1222382439, now seen corresponding path program 13 times [2022-11-16 12:45:35,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:35,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351318844] [2022-11-16 12:45:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:35,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351318844] [2022-11-16 12:45:35,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351318844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108609097] [2022-11-16 12:45:35,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:45:35,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:35,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:35,280 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:35,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:45:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:35,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:45:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:35,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108609097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:35,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:35,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-16 12:45:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873943590] [2022-11-16 12:45:35,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:45:35,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:45:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:45:35,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:35,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 2225 transitions, 49344 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:35,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:35,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:43,171 INFO L130 PetriNetUnfolder]: 2100/5423 cut-off events. [2022-11-16 12:45:43,171 INFO L131 PetriNetUnfolder]: For 142409/142428 co-relation queries the response was YES. [2022-11-16 12:45:43,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51953 conditions, 5423 events. 2100/5423 cut-off events. For 142409/142428 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48815 event pairs, 87 based on Foata normal form. 10/5384 useless extension candidates. Maximal degree in co-relation 51787. Up to 1624 conditions per place. [2022-11-16 12:45:43,293 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 1302 selfloop transitions, 1264 changer transitions 5/2612 dead transitions. [2022-11-16 12:45:43,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2612 transitions, 63217 flow [2022-11-16 12:45:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:45:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 12:45:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2179 transitions. [2022-11-16 12:45:43,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6651404151404151 [2022-11-16 12:45:43,299 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2179 transitions. [2022-11-16 12:45:43,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2179 transitions. [2022-11-16 12:45:43,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:43,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2179 transitions. [2022-11-16 12:45:43,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.87179487179487) internal successors, (2179), 39 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:43,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:43,313 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:43,314 INFO L175 Difference]: Start difference. First operand has 488 places, 2225 transitions, 49344 flow. Second operand 39 states and 2179 transitions. [2022-11-16 12:45:43,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2612 transitions, 63217 flow [2022-11-16 12:45:46,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 2612 transitions, 60102 flow, removed 1491 selfloop flow, removed 10 redundant places. [2022-11-16 12:45:46,655 INFO L231 Difference]: Finished difference. Result has 522 places, 2405 transitions, 55186 flow [2022-11-16 12:45:46,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=46126, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=55186, PETRI_PLACES=522, PETRI_TRANSITIONS=2405} [2022-11-16 12:45:46,658 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 448 predicate places. [2022-11-16 12:45:46,659 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2405 transitions, 55186 flow [2022-11-16 12:45:46,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:46,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:46,660 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:46,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:46,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:46,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:45:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:46,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1066815339, now seen corresponding path program 14 times [2022-11-16 12:45:46,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:46,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258054532] [2022-11-16 12:45:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:47,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:47,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258054532] [2022-11-16 12:45:47,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258054532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:47,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727995102] [2022-11-16 12:45:47,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:45:47,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:47,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:47,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:45:47,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:45:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:45:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:47,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:47,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727995102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:47,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:47,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-16 12:45:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562062042] [2022-11-16 12:45:47,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:45:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:45:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:45:47,822 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:45:47,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2405 transitions, 55186 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:47,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:47,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:45:47,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:56,269 INFO L130 PetriNetUnfolder]: 2373/6325 cut-off events. [2022-11-16 12:45:56,269 INFO L131 PetriNetUnfolder]: For 178048/178077 co-relation queries the response was YES. [2022-11-16 12:45:56,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60599 conditions, 6325 events. 2373/6325 cut-off events. For 178048/178077 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 59636 event pairs, 37 based on Foata normal form. 42/6361 useless extension candidates. Maximal degree in co-relation 60428. Up to 1851 conditions per place. [2022-11-16 12:45:56,410 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1531 selfloop transitions, 1332 changer transitions 0/2904 dead transitions. [2022-11-16 12:45:56,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 2904 transitions, 72786 flow [2022-11-16 12:45:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:45:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-16 12:45:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3085 transitions. [2022-11-16 12:45:56,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6558248299319728 [2022-11-16 12:45:56,416 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3085 transitions. [2022-11-16 12:45:56,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3085 transitions. [2022-11-16 12:45:56,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:56,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3085 transitions. [2022-11-16 12:45:56,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 55.089285714285715) internal successors, (3085), 56 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,431 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,431 INFO L175 Difference]: Start difference. First operand has 522 places, 2405 transitions, 55186 flow. Second operand 56 states and 3085 transitions. [2022-11-16 12:45:56,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 2904 transitions, 72786 flow [2022-11-16 12:45:59,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2904 transitions, 71657 flow, removed 199 selfloop flow, removed 20 redundant places. [2022-11-16 12:45:59,825 INFO L231 Difference]: Finished difference. Result has 583 places, 2750 transitions, 67980 flow [2022-11-16 12:45:59,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=54114, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=67980, PETRI_PLACES=583, PETRI_TRANSITIONS=2750} [2022-11-16 12:45:59,827 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 509 predicate places. [2022-11-16 12:45:59,827 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2750 transitions, 67980 flow [2022-11-16 12:45:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:59,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:59,828 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:59,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:00,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:00,038 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:46:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1696804425, now seen corresponding path program 15 times [2022-11-16 12:46:00,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:00,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013568234] [2022-11-16 12:46:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:00,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:00,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013568234] [2022-11-16 12:46:00,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013568234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:00,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765069560] [2022-11-16 12:46:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:46:00,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:00,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:00,200 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:00,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:46:00,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:46:00,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:46:00,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:00,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765069560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:00,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:00,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-16 12:46:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97335703] [2022-11-16 12:46:00,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:46:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:46:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:46:00,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:46:00,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2750 transitions, 67980 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:00,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:46:00,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:46:00,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:46:11,127 INFO L130 PetriNetUnfolder]: 2586/7042 cut-off events. [2022-11-16 12:46:11,127 INFO L131 PetriNetUnfolder]: For 238413/238432 co-relation queries the response was YES. [2022-11-16 12:46:11,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71889 conditions, 7042 events. 2586/7042 cut-off events. For 238413/238432 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68479 event pairs, 208 based on Foata normal form. 38/6990 useless extension candidates. Maximal degree in co-relation 71692. Up to 2875 conditions per place. [2022-11-16 12:46:11,306 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2029 selfloop transitions, 1164 changer transitions 2/3236 dead transitions. [2022-11-16 12:46:11,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 3236 transitions, 86224 flow [2022-11-16 12:46:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:46:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-16 12:46:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2331 transitions. [2022-11-16 12:46:11,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-11-16 12:46:11,312 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2331 transitions. [2022-11-16 12:46:11,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2331 transitions. [2022-11-16 12:46:11,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:46:11,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2331 transitions. [2022-11-16 12:46:11,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.5) internal successors, (2331), 42 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:11,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:11,326 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:11,326 INFO L175 Difference]: Start difference. First operand has 583 places, 2750 transitions, 67980 flow. Second operand 42 states and 2331 transitions. [2022-11-16 12:46:11,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 3236 transitions, 86224 flow [2022-11-16 12:46:16,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 3236 transitions, 83117 flow, removed 981 selfloop flow, removed 12 redundant places. [2022-11-16 12:46:16,436 INFO L231 Difference]: Finished difference. Result has 635 places, 3110 transitions, 78635 flow [2022-11-16 12:46:16,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=65021, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=78635, PETRI_PLACES=635, PETRI_TRANSITIONS=3110} [2022-11-16 12:46:16,440 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 561 predicate places. [2022-11-16 12:46:16,440 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 3110 transitions, 78635 flow [2022-11-16 12:46:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:16,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:46:16,441 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:16,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:16,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:16,647 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:46:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:16,647 INFO L85 PathProgramCache]: Analyzing trace with hash 770996869, now seen corresponding path program 16 times [2022-11-16 12:46:16,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:16,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583043574] [2022-11-16 12:46:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:16,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:16,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583043574] [2022-11-16 12:46:16,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583043574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:16,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355969710] [2022-11-16 12:46:16,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:46:16,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:16,872 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:16,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:46:16,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:46:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:46:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:17,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:17,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355969710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:17,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:17,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-16 12:46:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856447261] [2022-11-16 12:46:17,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:46:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:46:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:46:17,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:46:17,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 3110 transitions, 78635 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:17,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:46:17,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:46:17,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:46:31,045 INFO L130 PetriNetUnfolder]: 3078/8114 cut-off events. [2022-11-16 12:46:31,046 INFO L131 PetriNetUnfolder]: For 309718/309747 co-relation queries the response was YES. [2022-11-16 12:46:31,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88078 conditions, 8114 events. 3078/8114 cut-off events. For 309718/309747 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79452 event pairs, 213 based on Foata normal form. 22/8046 useless extension candidates. Maximal degree in co-relation 87860. Up to 4263 conditions per place. [2022-11-16 12:46:31,324 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2646 selfloop transitions, 1234 changer transitions 35/3956 dead transitions. [2022-11-16 12:46:31,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 3956 transitions, 110526 flow [2022-11-16 12:46:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:46:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 12:46:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2213 transitions. [2022-11-16 12:46:31,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586309523809524 [2022-11-16 12:46:31,327 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2213 transitions. [2022-11-16 12:46:31,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2213 transitions. [2022-11-16 12:46:31,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:46:31,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2213 transitions. [2022-11-16 12:46:31,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.325) internal successors, (2213), 40 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:31,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:31,339 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:31,340 INFO L175 Difference]: Start difference. First operand has 635 places, 3110 transitions, 78635 flow. Second operand 40 states and 2213 transitions. [2022-11-16 12:46:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 3956 transitions, 110526 flow [2022-11-16 12:46:38,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 3956 transitions, 107464 flow, removed 1013 selfloop flow, removed 9 redundant places. [2022-11-16 12:46:39,055 INFO L231 Difference]: Finished difference. Result has 687 places, 3611 transitions, 95082 flow [2022-11-16 12:46:39,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=76222, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=95082, PETRI_PLACES=687, PETRI_TRANSITIONS=3611} [2022-11-16 12:46:39,057 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 613 predicate places. [2022-11-16 12:46:39,058 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 3611 transitions, 95082 flow [2022-11-16 12:46:39,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:39,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:46:39,058 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:39,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:39,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:39,259 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:46:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1814685321, now seen corresponding path program 17 times [2022-11-16 12:46:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:46:39,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141302772] [2022-11-16 12:46:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:39,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:46:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:39,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:46:39,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141302772] [2022-11-16 12:46:39,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141302772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:46:39,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781815865] [2022-11-16 12:46:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:46:39,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:46:39,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:46:39,448 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:46:39,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:46:39,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:46:39,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:46:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:46:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:39,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:40,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781815865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:40,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:40,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 27 [2022-11-16 12:46:40,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006598861] [2022-11-16 12:46:40,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:40,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:46:40,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:46:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:46:40,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:46:40,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 3611 transitions, 95082 flow. Second operand has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:40,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:46:40,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:46:40,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:46:58,132 INFO L130 PetriNetUnfolder]: 3266/8672 cut-off events. [2022-11-16 12:46:58,132 INFO L131 PetriNetUnfolder]: For 369914/369949 co-relation queries the response was YES. [2022-11-16 12:46:58,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97488 conditions, 8672 events. 3266/8672 cut-off events. For 369914/369949 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 86199 event pairs, 10 based on Foata normal form. 74/8744 useless extension candidates. Maximal degree in co-relation 97250. Up to 1563 conditions per place. [2022-11-16 12:46:58,479 INFO L137 encePairwiseOnDemand]: 64/84 looper letters, 205 selfloop transitions, 3539 changer transitions 364/4149 dead transitions. [2022-11-16 12:46:58,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 4149 transitions, 119426 flow [2022-11-16 12:46:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:46:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-16 12:46:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3830 transitions. [2022-11-16 12:46:58,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.642186452045607 [2022-11-16 12:46:58,486 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3830 transitions. [2022-11-16 12:46:58,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3830 transitions. [2022-11-16 12:46:58,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:46:58,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3830 transitions. [2022-11-16 12:46:58,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 53.943661971830984) internal successors, (3830), 71 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:58,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:58,503 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:58,503 INFO L175 Difference]: Start difference. First operand has 687 places, 3611 transitions, 95082 flow. Second operand 71 states and 3830 transitions. [2022-11-16 12:46:58,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 4149 transitions, 119426 flow [2022-11-16 12:47:07,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4149 transitions, 116682 flow, removed 1029 selfloop flow, removed 18 redundant places. [2022-11-16 12:47:07,702 INFO L231 Difference]: Finished difference. Result has 753 places, 3754 transitions, 108291 flow [2022-11-16 12:47:07,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92150, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=108291, PETRI_PLACES=753, PETRI_TRANSITIONS=3754} [2022-11-16 12:47:07,704 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 679 predicate places. [2022-11-16 12:47:07,705 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3754 transitions, 108291 flow [2022-11-16 12:47:07,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:07,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:07,705 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:07,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:07,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:47:07,906 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:47:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:07,906 INFO L85 PathProgramCache]: Analyzing trace with hash 814750091, now seen corresponding path program 18 times [2022-11-16 12:47:07,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:07,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776083314] [2022-11-16 12:47:07,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:07,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:08,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:08,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776083314] [2022-11-16 12:47:08,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776083314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:08,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438984799] [2022-11-16 12:47:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:47:08,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:08,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:08,073 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:08,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:47:08,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:47:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:47:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:08,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:08,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438984799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:08,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:08,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 12:47:08,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693800880] [2022-11-16 12:47:08,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:08,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:47:08,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:08,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:47:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:47:08,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:47:08,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3754 transitions, 108291 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:08,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:08,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:47:08,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:23,677 INFO L130 PetriNetUnfolder]: 3140/7583 cut-off events. [2022-11-16 12:47:23,677 INFO L131 PetriNetUnfolder]: For 359610/359645 co-relation queries the response was YES. [2022-11-16 12:47:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98078 conditions, 7583 events. 3140/7583 cut-off events. For 359610/359645 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69586 event pairs, 208 based on Foata normal form. 26/7521 useless extension candidates. Maximal degree in co-relation 97829. Up to 4341 conditions per place. [2022-11-16 12:47:23,906 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 2608 selfloop transitions, 1472 changer transitions 4/4125 dead transitions. [2022-11-16 12:47:23,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 4125 transitions, 127508 flow [2022-11-16 12:47:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:47:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-16 12:47:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1382 transitions. [2022-11-16 12:47:23,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6580952380952381 [2022-11-16 12:47:23,910 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1382 transitions. [2022-11-16 12:47:23,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1382 transitions. [2022-11-16 12:47:23,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:23,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1382 transitions. [2022-11-16 12:47:23,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.28) internal successors, (1382), 25 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:23,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:23,916 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:23,916 INFO L175 Difference]: Start difference. First operand has 753 places, 3754 transitions, 108291 flow. Second operand 25 states and 1382 transitions. [2022-11-16 12:47:23,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 4125 transitions, 127508 flow [2022-11-16 12:47:33,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 4125 transitions, 114144 flow, removed 2750 selfloop flow, removed 51 redundant places. [2022-11-16 12:47:33,479 INFO L231 Difference]: Finished difference. Result has 711 places, 3907 transitions, 106333 flow [2022-11-16 12:47:33,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96103, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=106333, PETRI_PLACES=711, PETRI_TRANSITIONS=3907} [2022-11-16 12:47:33,482 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 637 predicate places. [2022-11-16 12:47:33,482 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 3907 transitions, 106333 flow [2022-11-16 12:47:33,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:33,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:33,483 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:33,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:33,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:47:33,689 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:47:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash -789623059, now seen corresponding path program 19 times [2022-11-16 12:47:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:33,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046222202] [2022-11-16 12:47:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046222202] [2022-11-16 12:47:33,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046222202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140930244] [2022-11-16 12:47:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:47:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:33,876 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:33,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:47:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:47:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:34,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:34,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140930244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:34,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:47:34,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-11-16 12:47:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687526924] [2022-11-16 12:47:34,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:34,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:47:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:47:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:47:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:47:34,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:47:34,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 3907 transitions, 106333 flow. Second operand has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:34,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:47:34,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:47:34,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:47:50,177 INFO L130 PetriNetUnfolder]: 3306/8039 cut-off events. [2022-11-16 12:47:50,178 INFO L131 PetriNetUnfolder]: For 339182/339201 co-relation queries the response was YES. [2022-11-16 12:47:50,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96028 conditions, 8039 events. 3306/8039 cut-off events. For 339182/339201 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 74722 event pairs, 141 based on Foata normal form. 15/7979 useless extension candidates. Maximal degree in co-relation 95802. Up to 2786 conditions per place. [2022-11-16 12:47:50,489 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2397 selfloop transitions, 1771 changer transitions 5/4214 dead transitions. [2022-11-16 12:47:50,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 4214 transitions, 123959 flow [2022-11-16 12:47:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:47:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:47:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1553 transitions. [2022-11-16 12:47:50,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6602891156462585 [2022-11-16 12:47:50,494 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1553 transitions. [2022-11-16 12:47:50,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1553 transitions. [2022-11-16 12:47:50,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:47:50,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1553 transitions. [2022-11-16 12:47:50,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.464285714285715) internal successors, (1553), 28 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,502 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:50,502 INFO L175 Difference]: Start difference. First operand has 711 places, 3907 transitions, 106333 flow. Second operand 28 states and 1553 transitions. [2022-11-16 12:47:50,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 4214 transitions, 123959 flow [2022-11-16 12:47:58,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 4214 transitions, 122240 flow, removed 807 selfloop flow, removed 8 redundant places. [2022-11-16 12:47:59,089 INFO L231 Difference]: Finished difference. Result has 743 places, 4143 transitions, 119554 flow [2022-11-16 12:47:59,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=104810, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=119554, PETRI_PLACES=743, PETRI_TRANSITIONS=4143} [2022-11-16 12:47:59,092 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 669 predicate places. [2022-11-16 12:47:59,092 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 4143 transitions, 119554 flow [2022-11-16 12:47:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:59,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:47:59,092 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:59,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 12:47:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:59,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:47:59,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1480117485, now seen corresponding path program 20 times [2022-11-16 12:47:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:59,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375890962] [2022-11-16 12:47:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:59,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:47:59,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375890962] [2022-11-16 12:47:59,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375890962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:47:59,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367274670] [2022-11-16 12:47:59,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:47:59,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:47:59,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:59,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:47:59,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:47:59,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:47:59,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:59,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:47:59,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:59,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:00,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367274670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:00,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:00,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 12:48:00,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774881267] [2022-11-16 12:48:00,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:00,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:48:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:48:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:48:00,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:48:00,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 4143 transitions, 119554 flow. Second operand has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:00,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:00,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:48:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:16,832 INFO L130 PetriNetUnfolder]: 3314/7942 cut-off events. [2022-11-16 12:48:16,832 INFO L131 PetriNetUnfolder]: For 385610/385629 co-relation queries the response was YES. [2022-11-16 12:48:17,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100437 conditions, 7942 events. 3314/7942 cut-off events. For 385610/385629 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 72883 event pairs, 219 based on Foata normal form. 30/7878 useless extension candidates. Maximal degree in co-relation 100200. Up to 3548 conditions per place. [2022-11-16 12:48:17,080 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2570 selfloop transitions, 1645 changer transitions 2/4258 dead transitions. [2022-11-16 12:48:17,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4258 transitions, 130862 flow [2022-11-16 12:48:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:48:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 12:48:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1809 transitions. [2022-11-16 12:48:17,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525974025974026 [2022-11-16 12:48:17,083 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1809 transitions. [2022-11-16 12:48:17,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1809 transitions. [2022-11-16 12:48:17,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:17,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1809 transitions. [2022-11-16 12:48:17,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 54.81818181818182) internal successors, (1809), 33 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:17,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:17,102 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:17,102 INFO L175 Difference]: Start difference. First operand has 743 places, 4143 transitions, 119554 flow. Second operand 33 states and 1809 transitions. [2022-11-16 12:48:17,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4258 transitions, 130862 flow [2022-11-16 12:48:26,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 4258 transitions, 129612 flow, removed 579 selfloop flow, removed 14 redundant places. [2022-11-16 12:48:26,740 INFO L231 Difference]: Finished difference. Result has 762 places, 4195 transitions, 125049 flow [2022-11-16 12:48:26,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=117657, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=125049, PETRI_PLACES=762, PETRI_TRANSITIONS=4195} [2022-11-16 12:48:26,743 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 688 predicate places. [2022-11-16 12:48:26,743 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 4195 transitions, 125049 flow [2022-11-16 12:48:26,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:26,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:26,744 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:26,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 12:48:26,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:48:26,945 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1898688641, now seen corresponding path program 21 times [2022-11-16 12:48:26,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:26,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077950967] [2022-11-16 12:48:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:26,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077950967] [2022-11-16 12:48:27,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077950967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402487289] [2022-11-16 12:48:27,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:48:27,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:27,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:27,200 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:27,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:48:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:48:27,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:48:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:27,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:27,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402487289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:27,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:27,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-16 12:48:27,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527013958] [2022-11-16 12:48:27,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:27,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:48:27,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:27,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:48:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:48:27,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:48:27,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 4195 transitions, 125049 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:27,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:48:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:48:46,768 INFO L130 PetriNetUnfolder]: 3523/8421 cut-off events. [2022-11-16 12:48:46,768 INFO L131 PetriNetUnfolder]: For 454402/454437 co-relation queries the response was YES. [2022-11-16 12:48:47,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110901 conditions, 8421 events. 3523/8421 cut-off events. For 454402/454437 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 77802 event pairs, 223 based on Foata normal form. 44/8370 useless extension candidates. Maximal degree in co-relation 110665. Up to 3858 conditions per place. [2022-11-16 12:48:47,289 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2934 selfloop transitions, 1657 changer transitions 7/4639 dead transitions. [2022-11-16 12:48:47,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 4639 transitions, 149214 flow [2022-11-16 12:48:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 12:48:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-16 12:48:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2727 transitions. [2022-11-16 12:48:47,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6492857142857142 [2022-11-16 12:48:47,292 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2727 transitions. [2022-11-16 12:48:47,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2727 transitions. [2022-11-16 12:48:47,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:48:47,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2727 transitions. [2022-11-16 12:48:47,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 54.54) internal successors, (2727), 50 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,303 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:47,303 INFO L175 Difference]: Start difference. First operand has 762 places, 4195 transitions, 125049 flow. Second operand 50 states and 2727 transitions. [2022-11-16 12:48:47,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 4639 transitions, 149214 flow [2022-11-16 12:48:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 4639 transitions, 147844 flow, removed 164 selfloop flow, removed 20 redundant places. [2022-11-16 12:48:57,862 INFO L231 Difference]: Finished difference. Result has 810 places, 4482 transitions, 140290 flow [2022-11-16 12:48:57,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=123349, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=140290, PETRI_PLACES=810, PETRI_TRANSITIONS=4482} [2022-11-16 12:48:57,866 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 736 predicate places. [2022-11-16 12:48:57,866 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 4482 transitions, 140290 flow [2022-11-16 12:48:57,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:57,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:48:57,867 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:57,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:48:58,073 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:48:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1315811141, now seen corresponding path program 22 times [2022-11-16 12:48:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:58,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472289219] [2022-11-16 12:48:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:58,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:58,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:58,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472289219] [2022-11-16 12:48:58,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472289219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:58,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329930467] [2022-11-16 12:48:58,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:48:58,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:58,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:58,284 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:58,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:48:58,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:48:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:58,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:48:58,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:58,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:58,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329930467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:58,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:58,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 12:48:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807081308] [2022-11-16 12:48:58,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:58,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:48:58,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:48:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:48:58,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:48:58,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 4482 transitions, 140290 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:58,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:48:58,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:48:58,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:49:22,017 INFO L130 PetriNetUnfolder]: 3641/8778 cut-off events. [2022-11-16 12:49:22,017 INFO L131 PetriNetUnfolder]: For 523832/523851 co-relation queries the response was YES. [2022-11-16 12:49:22,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119290 conditions, 8778 events. 3641/8778 cut-off events. For 523832/523851 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 82154 event pairs, 21 based on Foata normal form. 10/8770 useless extension candidates. Maximal degree in co-relation 119033. Up to 3084 conditions per place. [2022-11-16 12:49:22,424 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2915 selfloop transitions, 1751 changer transitions 1/4708 dead transitions. [2022-11-16 12:49:22,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 4708 transitions, 157184 flow [2022-11-16 12:49:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:49:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 12:49:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2256 transitions. [2022-11-16 12:49:22,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2022-11-16 12:49:22,429 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2256 transitions. [2022-11-16 12:49:22,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2256 transitions. [2022-11-16 12:49:22,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:49:22,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2256 transitions. [2022-11-16 12:49:22,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 55.02439024390244) internal successors, (2256), 41 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:22,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:22,437 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:22,437 INFO L175 Difference]: Start difference. First operand has 810 places, 4482 transitions, 140290 flow. Second operand 41 states and 2256 transitions. [2022-11-16 12:49:22,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 4708 transitions, 157184 flow [2022-11-16 12:49:34,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 4708 transitions, 154509 flow, removed 1261 selfloop flow, removed 12 redundant places. [2022-11-16 12:49:34,573 INFO L231 Difference]: Finished difference. Result has 851 places, 4645 transitions, 150498 flow [2022-11-16 12:49:34,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=137633, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=150498, PETRI_PLACES=851, PETRI_TRANSITIONS=4645} [2022-11-16 12:49:34,582 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 777 predicate places. [2022-11-16 12:49:34,583 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 4645 transitions, 150498 flow [2022-11-16 12:49:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:34,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:49:34,583 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:34,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:34,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:49:34,789 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:49:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash -828364127, now seen corresponding path program 23 times [2022-11-16 12:49:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:34,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773932382] [2022-11-16 12:49:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:34,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773932382] [2022-11-16 12:49:34,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773932382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734154768] [2022-11-16 12:49:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:49:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:34,932 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:34,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:49:35,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:49:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:49:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:49:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:35,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:35,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734154768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:35,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:49:35,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-16 12:49:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143923819] [2022-11-16 12:49:35,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:49:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:49:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:49:35,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:49:35,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 4645 transitions, 150498 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:35,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:49:35,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:49:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:50:00,948 INFO L130 PetriNetUnfolder]: 4112/10022 cut-off events. [2022-11-16 12:50:00,948 INFO L131 PetriNetUnfolder]: For 674972/674991 co-relation queries the response was YES. [2022-11-16 12:50:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140841 conditions, 10022 events. 4112/10022 cut-off events. For 674972/674991 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 97179 event pairs, 35 based on Foata normal form. 15/10015 useless extension candidates. Maximal degree in co-relation 140573. Up to 2588 conditions per place. [2022-11-16 12:50:01,370 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2649 selfloop transitions, 2748 changer transitions 4/5442 dead transitions. [2022-11-16 12:50:01,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 5442 transitions, 188811 flow [2022-11-16 12:50:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:50:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:50:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2067 transitions. [2022-11-16 12:50:01,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.665057915057915 [2022-11-16 12:50:01,374 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2067 transitions. [2022-11-16 12:50:01,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2067 transitions. [2022-11-16 12:50:01,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:50:01,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2067 transitions. [2022-11-16 12:50:01,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.86486486486486) internal successors, (2067), 37 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,530 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,530 INFO L175 Difference]: Start difference. First operand has 851 places, 4645 transitions, 150498 flow. Second operand 37 states and 2067 transitions. [2022-11-16 12:50:01,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 5442 transitions, 188811 flow [2022-11-16 12:50:18,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 5442 transitions, 186273 flow, removed 1203 selfloop flow, removed 9 redundant places. [2022-11-16 12:50:18,440 INFO L231 Difference]: Finished difference. Result has 895 places, 5212 transitions, 180814 flow [2022-11-16 12:50:18,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148902, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=180814, PETRI_PLACES=895, PETRI_TRANSITIONS=5212} [2022-11-16 12:50:18,444 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 821 predicate places. [2022-11-16 12:50:18,444 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 5212 transitions, 180814 flow [2022-11-16 12:50:18,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:18,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:50:18,445 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:18,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:18,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:50:18,650 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:50:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -590052515, now seen corresponding path program 24 times [2022-11-16 12:50:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609777518] [2022-11-16 12:50:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:18,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:18,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609777518] [2022-11-16 12:50:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609777518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188619860] [2022-11-16 12:50:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:50:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:18,779 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:18,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:50:18,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:50:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:50:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:19,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:19,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188619860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:19,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:50:19,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-16 12:50:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511433068] [2022-11-16 12:50:19,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:19,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:50:19,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:50:19,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:50:19,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:50:19,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 5212 transitions, 180814 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:19,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:50:19,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:50:19,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:50:48,564 INFO L130 PetriNetUnfolder]: 4394/10621 cut-off events. [2022-11-16 12:50:48,565 INFO L131 PetriNetUnfolder]: For 805685/805720 co-relation queries the response was YES. [2022-11-16 12:50:48,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158472 conditions, 10621 events. 4394/10621 cut-off events. For 805685/805720 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 103229 event pairs, 296 based on Foata normal form. 27/10530 useless extension candidates. Maximal degree in co-relation 158188. Up to 4865 conditions per place. [2022-11-16 12:50:49,058 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 3584 selfloop transitions, 2100 changer transitions 2/5727 dead transitions. [2022-11-16 12:50:49,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 943 places, 5727 transitions, 210245 flow [2022-11-16 12:50:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:50:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 12:50:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2705 transitions. [2022-11-16 12:50:49,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6571914480077745 [2022-11-16 12:50:49,064 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2705 transitions. [2022-11-16 12:50:49,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2705 transitions. [2022-11-16 12:50:49,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:50:49,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2705 transitions. [2022-11-16 12:50:49,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.204081632653065) internal successors, (2705), 49 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:49,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:49,073 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:49,073 INFO L175 Difference]: Start difference. First operand has 895 places, 5212 transitions, 180814 flow. Second operand 49 states and 2705 transitions. [2022-11-16 12:50:49,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 943 places, 5727 transitions, 210245 flow [2022-11-16 12:51:09,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 934 places, 5727 transitions, 206676 flow, removed 928 selfloop flow, removed 9 redundant places. [2022-11-16 12:51:09,805 INFO L231 Difference]: Finished difference. Result has 958 places, 5583 transitions, 198410 flow [2022-11-16 12:51:09,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=177485, PETRI_DIFFERENCE_MINUEND_PLACES=886, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1775, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=198410, PETRI_PLACES=958, PETRI_TRANSITIONS=5583} [2022-11-16 12:51:09,809 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 884 predicate places. [2022-11-16 12:51:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 958 places, 5583 transitions, 198410 flow [2022-11-16 12:51:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:09,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:51:09,810 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:10,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:10,015 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:51:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 50219123, now seen corresponding path program 25 times [2022-11-16 12:51:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:10,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918618565] [2022-11-16 12:51:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:10,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:10,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918618565] [2022-11-16 12:51:10,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918618565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931276291] [2022-11-16 12:51:10,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:51:10,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:10,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:10,163 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:10,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:51:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:51:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:10,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:10,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931276291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:10,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:51:10,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-11-16 12:51:10,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643137631] [2022-11-16 12:51:10,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:10,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:51:10,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:51:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:51:10,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:51:10,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 5583 transitions, 198410 flow. Second operand has 25 states, 25 states have (on average 53.32) internal successors, (1333), 25 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:10,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:51:10,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:51:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:51:51,147 INFO L130 PetriNetUnfolder]: 4915/12239 cut-off events. [2022-11-16 12:51:51,147 INFO L131 PetriNetUnfolder]: For 938101/938120 co-relation queries the response was YES. [2022-11-16 12:51:51,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179940 conditions, 12239 events. 4915/12239 cut-off events. For 938101/938120 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 124241 event pairs, 50 based on Foata normal form. 15/12230 useless extension candidates. Maximal degree in co-relation 179634. Up to 3421 conditions per place. [2022-11-16 12:51:51,748 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 3189 selfloop transitions, 3141 changer transitions 3/6374 dead transitions. [2022-11-16 12:51:51,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 6374 transitions, 238710 flow [2022-11-16 12:51:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:51:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 12:51:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2153 transitions. [2022-11-16 12:51:51,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6572039072039072 [2022-11-16 12:51:51,751 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2153 transitions. [2022-11-16 12:51:51,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2153 transitions. [2022-11-16 12:51:51,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:51,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2153 transitions. [2022-11-16 12:51:51,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.205128205128204) internal successors, (2153), 39 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:51,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:51,755 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:51,755 INFO L175 Difference]: Start difference. First operand has 958 places, 5583 transitions, 198410 flow. Second operand 39 states and 2153 transitions. [2022-11-16 12:51:51,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 6374 transitions, 238710 flow [2022-11-16 12:52:17,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 987 places, 6374 transitions, 235893 flow, removed 549 selfloop flow, removed 9 redundant places. [2022-11-16 12:52:17,448 INFO L231 Difference]: Finished difference. Result has 1011 places, 6277 transitions, 233633 flow [2022-11-16 12:52:17,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=195758, PETRI_DIFFERENCE_MINUEND_PLACES=949, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=233633, PETRI_PLACES=1011, PETRI_TRANSITIONS=6277} [2022-11-16 12:52:17,453 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 937 predicate places. [2022-11-16 12:52:17,453 INFO L495 AbstractCegarLoop]: Abstraction has has 1011 places, 6277 transitions, 233633 flow [2022-11-16 12:52:17,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.32) internal successors, (1333), 25 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:17,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:17,454 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:17,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:17,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:17,659 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:52:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1383459875, now seen corresponding path program 26 times [2022-11-16 12:52:17,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313683080] [2022-11-16 12:52:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:17,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:17,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313683080] [2022-11-16 12:52:17,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313683080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:17,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800121055] [2022-11-16 12:52:17,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:52:17,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:17,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:17,832 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:17,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:52:17,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:52:17,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:52:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:18,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:18,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800121055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:18,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:18,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 12:52:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986062340] [2022-11-16 12:52:18,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:18,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:52:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:52:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:52:18,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:52:18,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1011 places, 6277 transitions, 233633 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:18,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:18,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:52:18,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:01,710 INFO L130 PetriNetUnfolder]: 4947/11919 cut-off events. [2022-11-16 12:53:01,710 INFO L131 PetriNetUnfolder]: For 1021908/1021927 co-relation queries the response was YES. [2022-11-16 12:53:02,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189854 conditions, 11919 events. 4947/11919 cut-off events. For 1021908/1021927 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 118469 event pairs, 352 based on Foata normal form. 14/11781 useless extension candidates. Maximal degree in co-relation 189525. Up to 6981 conditions per place. [2022-11-16 12:53:02,535 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 4433 selfloop transitions, 2201 changer transitions 6/6681 dead transitions. [2022-11-16 12:53:02,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 6681 transitions, 261285 flow [2022-11-16 12:53:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:53:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:53:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2028 transitions. [2022-11-16 12:53:02,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525096525096525 [2022-11-16 12:53:02,540 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2028 transitions. [2022-11-16 12:53:02,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2028 transitions. [2022-11-16 12:53:02,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:02,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2028 transitions. [2022-11-16 12:53:02,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 54.810810810810814) internal successors, (2028), 37 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:02,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:02,547 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:02,547 INFO L175 Difference]: Start difference. First operand has 1011 places, 6277 transitions, 233633 flow. Second operand 37 states and 2028 transitions. [2022-11-16 12:53:02,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 6681 transitions, 261285 flow [2022-11-16 12:53:37,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1033 places, 6681 transitions, 258282 flow, removed 1452 selfloop flow, removed 12 redundant places. [2022-11-16 12:53:37,298 INFO L231 Difference]: Finished difference. Result has 1039 places, 6374 transitions, 242880 flow [2022-11-16 12:53:37,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=230032, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2088, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=242880, PETRI_PLACES=1039, PETRI_TRANSITIONS=6374} [2022-11-16 12:53:37,302 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 965 predicate places. [2022-11-16 12:53:37,303 INFO L495 AbstractCegarLoop]: Abstraction has has 1039 places, 6374 transitions, 242880 flow [2022-11-16 12:53:37,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:37,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:37,303 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:37,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 12:53:37,504 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:53:37,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash 371172483, now seen corresponding path program 27 times [2022-11-16 12:53:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:37,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129577222] [2022-11-16 12:53:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:37,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:37,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129577222] [2022-11-16 12:53:37,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129577222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:37,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564080396] [2022-11-16 12:53:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:53:37,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:37,654 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:37,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:53:37,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:53:37,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:37,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:53:37,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:37,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:38,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564080396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:38,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:53:38,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 12:53:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730828333] [2022-11-16 12:53:38,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:53:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:53:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:53:38,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:53:38,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1039 places, 6374 transitions, 242880 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:38,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:38,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:53:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:54:24,638 INFO L130 PetriNetUnfolder]: 4922/11808 cut-off events. [2022-11-16 12:54:24,638 INFO L131 PetriNetUnfolder]: For 1069448/1069467 co-relation queries the response was YES. [2022-11-16 12:54:25,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191263 conditions, 11808 events. 4922/11808 cut-off events. For 1069448/1069467 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 116662 event pairs, 319 based on Foata normal form. 10/11676 useless extension candidates. Maximal degree in co-relation 190932. Up to 6939 conditions per place. [2022-11-16 12:54:25,414 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 4422 selfloop transitions, 2185 changer transitions 7/6655 dead transitions. [2022-11-16 12:54:25,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1071 places, 6655 transitions, 263856 flow [2022-11-16 12:54:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:54:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-16 12:54:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1944 transitions. [2022-11-16 12:54:25,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2022-11-16 12:54:25,416 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1944 transitions. [2022-11-16 12:54:25,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1944 transitions. [2022-11-16 12:54:25,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:54:25,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1944 transitions. [2022-11-16 12:54:25,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.542857142857144) internal successors, (1944), 35 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:25,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:25,420 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:25,420 INFO L175 Difference]: Start difference. First operand has 1039 places, 6374 transitions, 242880 flow. Second operand 35 states and 1944 transitions. [2022-11-16 12:54:25,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1071 places, 6655 transitions, 263856 flow [2022-11-16 12:54:51,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 6655 transitions, 262468 flow, removed 326 selfloop flow, removed 20 redundant places. [2022-11-16 12:54:51,847 INFO L231 Difference]: Finished difference. Result has 1052 places, 6355 transitions, 246519 flow [2022-11-16 12:54:51,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=240857, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=246519, PETRI_PLACES=1052, PETRI_TRANSITIONS=6355} [2022-11-16 12:54:51,850 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 978 predicate places. [2022-11-16 12:54:51,850 INFO L495 AbstractCegarLoop]: Abstraction has has 1052 places, 6355 transitions, 246519 flow [2022-11-16 12:54:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:51,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:54:51,850 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:51,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-16 12:54:52,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:54:52,051 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:54:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash 882214053, now seen corresponding path program 28 times [2022-11-16 12:54:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:54:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42914016] [2022-11-16 12:54:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:54:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:52,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:54:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42914016] [2022-11-16 12:54:52,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42914016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:54:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796402504] [2022-11-16 12:54:52,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:54:52,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:54:52,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:54:52,195 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:54:52,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:54:52,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:54:52,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:54:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:54:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:52,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796402504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:52,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:54:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-16 12:54:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555230080] [2022-11-16 12:54:52,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:54:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:54:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:54:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:54:52,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:54:52,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1052 places, 6355 transitions, 246519 flow. Second operand has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:52,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:54:52,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:54:52,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:55:37,626 INFO L130 PetriNetUnfolder]: 5132/12479 cut-off events. [2022-11-16 12:55:37,626 INFO L131 PetriNetUnfolder]: For 1172336/1172355 co-relation queries the response was YES. [2022-11-16 12:55:38,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202871 conditions, 12479 events. 5132/12479 cut-off events. For 1172336/1172355 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 124531 event pairs, 32 based on Foata normal form. 22/12474 useless extension candidates. Maximal degree in co-relation 202540. Up to 4316 conditions per place. [2022-11-16 12:55:38,480 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 4011 selfloop transitions, 2676 changer transitions 0/6728 dead transitions. [2022-11-16 12:55:38,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1092 places, 6728 transitions, 273096 flow [2022-11-16 12:55:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:55:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 12:55:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2273 transitions. [2022-11-16 12:55:38,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6599883855981417 [2022-11-16 12:55:38,483 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2273 transitions. [2022-11-16 12:55:38,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2273 transitions. [2022-11-16 12:55:38,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:55:38,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2273 transitions. [2022-11-16 12:55:38,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 55.4390243902439) internal successors, (2273), 41 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:55:38,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:55:38,489 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:55:38,489 INFO L175 Difference]: Start difference. First operand has 1052 places, 6355 transitions, 246519 flow. Second operand 41 states and 2273 transitions. [2022-11-16 12:55:38,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1092 places, 6728 transitions, 273096 flow [2022-11-16 12:56:05,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1067 places, 6728 transitions, 269667 flow, removed 303 selfloop flow, removed 25 redundant places. [2022-11-16 12:56:05,393 INFO L231 Difference]: Finished difference. Result has 1085 places, 6608 transitions, 263045 flow [2022-11-16 12:56:05,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=243222, PETRI_DIFFERENCE_MINUEND_PLACES=1027, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=263045, PETRI_PLACES=1085, PETRI_TRANSITIONS=6608} [2022-11-16 12:56:05,395 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1011 predicate places. [2022-11-16 12:56:05,395 INFO L495 AbstractCegarLoop]: Abstraction has has 1085 places, 6608 transitions, 263045 flow [2022-11-16 12:56:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.476190476190474) internal successors, (1123), 21 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:56:05,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:56:05,396 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:56:05,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-16 12:56:05,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:56:05,596 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:56:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:56:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash -754504069, now seen corresponding path program 29 times [2022-11-16 12:56:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:56:05,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885925266] [2022-11-16 12:56:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:56:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:56:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:56:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:56:05,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:56:05,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885925266] [2022-11-16 12:56:05,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885925266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:56:05,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799193583] [2022-11-16 12:56:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:56:05,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:56:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:56:05,715 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:56:05,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:56:05,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:56:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:56:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:56:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:56:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:56:05,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:56:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:56:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799193583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:56:06,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:56:06,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-16 12:56:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041940439] [2022-11-16 12:56:06,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:56:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:56:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:56:06,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:56:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:56:06,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:56:06,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1085 places, 6608 transitions, 263045 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:56:06,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:56:06,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:56:06,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:56:53,636 INFO L130 PetriNetUnfolder]: 5244/12652 cut-off events. [2022-11-16 12:56:53,636 INFO L131 PetriNetUnfolder]: For 1298100/1298135 co-relation queries the response was YES. [2022-11-16 12:56:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213702 conditions, 12652 events. 5244/12652 cut-off events. For 1298100/1298135 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 126531 event pairs, 326 based on Foata normal form. 23/12529 useless extension candidates. Maximal degree in co-relation 213354. Up to 6040 conditions per place. [2022-11-16 12:56:54,584 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 4126 selfloop transitions, 2794 changer transitions 8/6969 dead transitions. [2022-11-16 12:56:54,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1117 places, 6969 transitions, 292130 flow [2022-11-16 12:56:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:56:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-16 12:56:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1812 transitions. [2022-11-16 12:56:54,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6536796536796536 [2022-11-16 12:56:54,587 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1812 transitions. [2022-11-16 12:56:54,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1812 transitions. [2022-11-16 12:56:54,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:56:54,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1812 transitions. [2022-11-16 12:56:54,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 54.90909090909091) internal successors, (1812), 33 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:56:54,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:56:54,593 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:56:54,593 INFO L175 Difference]: Start difference. First operand has 1085 places, 6608 transitions, 263045 flow. Second operand 33 states and 1812 transitions. [2022-11-16 12:56:54,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1117 places, 6969 transitions, 292130 flow [2022-11-16 12:57:26,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1106 places, 6969 transitions, 291504 flow, removed 271 selfloop flow, removed 11 redundant places. [2022-11-16 12:57:26,634 INFO L231 Difference]: Finished difference. Result has 1121 places, 6849 transitions, 283439 flow [2022-11-16 12:57:26,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=262156, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=283439, PETRI_PLACES=1121, PETRI_TRANSITIONS=6849} [2022-11-16 12:57:26,637 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 1047 predicate places. [2022-11-16 12:57:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 1121 places, 6849 transitions, 283439 flow [2022-11-16 12:57:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:57:26,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:57:26,638 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:57:26,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:57:26,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 12:57:26,838 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:57:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:57:26,839 INFO L85 PathProgramCache]: Analyzing trace with hash 772909457, now seen corresponding path program 30 times [2022-11-16 12:57:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:57:26,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488696300] [2022-11-16 12:57:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:57:26,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:57:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:57:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:57:26,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:57:26,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488696300] [2022-11-16 12:57:26,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488696300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:57:26,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536944548] [2022-11-16 12:57:26,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:57:26,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:57:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:57:26,992 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:57:27,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8c3f4f-a62b-40d3-b235-1cb28b5ef40c/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:57:27,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:57:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:57:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:57:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:57:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:57:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:57:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:57:27,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536944548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:57:27,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:57:27,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 12:57:27,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033273174] [2022-11-16 12:57:27,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:57:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:57:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:57:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:57:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:57:27,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-16 12:57:27,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1121 places, 6849 transitions, 283439 flow. Second operand has 23 states, 23 states have (on average 53.43478260869565) internal successors, (1229), 23 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:57:27,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:57:27,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-16 12:57:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:58:25,777 INFO L130 PetriNetUnfolder]: 5209/12477 cut-off events. [2022-11-16 12:58:25,777 INFO L131 PetriNetUnfolder]: For 1384488/1384523 co-relation queries the response was YES. [2022-11-16 12:58:26,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217961 conditions, 12477 events. 5209/12477 cut-off events. For 1384488/1384523 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 123490 event pairs, 324 based on Foata normal form. 27/12360 useless extension candidates. Maximal degree in co-relation 217598. Up to 6040 conditions per place. [2022-11-16 12:58:26,868 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 4714 selfloop transitions, 2150 changer transitions 1/6906 dead transitions. [2022-11-16 12:58:26,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1141 places, 6906 transitions, 298610 flow [2022-11-16 12:58:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:58:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 12:58:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1439 transitions. [2022-11-16 12:58:26,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6588827838827839 [2022-11-16 12:58:26,874 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1439 transitions. [2022-11-16 12:58:26,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1439 transitions. [2022-11-16 12:58:26,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:58:26,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1439 transitions. [2022-11-16 12:58:26,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.34615384615385) internal successors, (1439), 26 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:58:26,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:58:26,879 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 84.0) internal successors, (2268), 27 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:58:26,879 INFO L175 Difference]: Start difference. First operand has 1121 places, 6849 transitions, 283439 flow. Second operand 26 states and 1439 transitions. [2022-11-16 12:58:26,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1141 places, 6906 transitions, 298610 flow