./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8 --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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- 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-2329fc7 [2022-12-13 13:03:57,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:03:57,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:03:57,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:03:57,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:03:57,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:03:57,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:03:57,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:03:57,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:03:57,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:03:57,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:03:57,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:03:57,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:03:57,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:03:57,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:03:57,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:03:57,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:03:57,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:03:57,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:03:57,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:03:57,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:03:57,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:03:57,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:03:57,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:03:57,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:03:57,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:03:57,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:03:57,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:03:57,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:03:57,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:03:57,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:03:57,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:03:57,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:03:57,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:03:57,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:03:57,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:03:57,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:03:57,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:03:57,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:03:57,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:03:57,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:03:57,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:03:57,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:03:57,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:03:57,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:03:57,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:03:57,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:03:57,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:03:57,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:03:57,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:03:57,559 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:03:57,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:03:57,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:03:57,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:03:57,561 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:03:57,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:03:57,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:03:57,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:03:57,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:03:57,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:03:57,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:03:57,562 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:03:57,563 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-12-13 13:03:57,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:03:57,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:03:57,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:03:57,740 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:03:57,740 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:03:57,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-12-13 13:04:00,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:04:00,391 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:04:00,392 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-12-13 13:04:00,397 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/data/f14155d2e/c9d5d6d8ca1848658c814ff09dd3e8f7/FLAG4fc426d9f [2022-12-13 13:04:00,408 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/data/f14155d2e/c9d5d6d8ca1848658c814ff09dd3e8f7 [2022-12-13 13:04:00,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:04:00,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:04:00,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:04:00,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:04:00,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:04:00,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1494d91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00, skipping insertion in model container [2022-12-13 13:04:00,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:04:00,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:04:00,571 WARN L237 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_2876902c-29cc-413a-a42e-beb40610fc0f/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-12-13 13:04:00,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:04:00,591 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:04:00,609 WARN L237 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_2876902c-29cc-413a-a42e-beb40610fc0f/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-12-13 13:04:00,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:04:00,624 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:04:00,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00 WrapperNode [2022-12-13 13:04:00,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:04:00,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:04:00,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:04:00,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:04:00,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,661 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-12-13 13:04:00,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:04:00,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:04:00,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:04:00,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:04:00,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:04:00,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:04:00,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:04:00,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:04:00,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (1/1) ... [2022-12-13 13:04:00,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:04:00,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:00,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:04:00,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:04:00,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:04:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:04:00,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:04:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:04:00,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:04:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:04:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:04:00,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:04:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:04:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:04:00,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:04:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:04:00,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:04:00,750 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:04:00,838 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:04:00,840 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:04:01,057 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:04:01,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:04:01,067 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 13:04:01,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:04:01 BoogieIcfgContainer [2022-12-13 13:04:01,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:04:01,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:04:01,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:04:01,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:04:01,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:04:00" (1/3) ... [2022-12-13 13:04:01,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3598f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:04:01, skipping insertion in model container [2022-12-13 13:04:01,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:00" (2/3) ... [2022-12-13 13:04:01,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3598f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:04:01, skipping insertion in model container [2022-12-13 13:04:01,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:04:01" (3/3) ... [2022-12-13 13:04:01,079 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-12-13 13:04:01,089 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 13:04:01,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:04:01,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:04:01,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:04:01,194 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:04:01,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 358 flow [2022-12-13 13:04:01,282 INFO L130 PetriNetUnfolder]: 14/169 cut-off events. [2022-12-13 13:04:01,282 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:04:01,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 153 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-12-13 13:04:01,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 358 flow [2022-12-13 13:04:01,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2022-12-13 13:04:01,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:04:01,301 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 332 flow [2022-12-13 13:04:01,303 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 332 flow [2022-12-13 13:04:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 332 flow [2022-12-13 13:04:01,333 INFO L130 PetriNetUnfolder]: 14/160 cut-off events. [2022-12-13 13:04:01,333 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:04:01,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 14/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-12-13 13:04:01,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 2128 [2022-12-13 13:04:04,927 INFO L134 LiptonReduction]: Checked pairs total: 2071 [2022-12-13 13:04:04,927 INFO L136 LiptonReduction]: Total number of compositions: 186 [2022-12-13 13:04:04,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:04:04,942 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;@544cbae4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:04:04,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 13:04:04,945 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 13:04:04,945 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:04:04,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:04,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:04,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash -441136445, now seen corresponding path program 1 times [2022-12-13 13:04:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:04,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115445204] [2022-12-13 13:04:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:05,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:05,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115445204] [2022-12-13 13:04:05,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115445204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:05,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:05,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:04:05,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609909322] [2022-12-13 13:04:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:05,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 357 [2022-12-13 13:04:05,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:05,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 357 [2022-12-13 13:04:05,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:05,296 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2022-12-13 13:04:05,296 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 13:04:05,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 187 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2022-12-13 13:04:05,298 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-13 13:04:05,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-13 13:04:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2022-12-13 13:04:05,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332399626517274 [2022-12-13 13:04:05,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2022-12-13 13:04:05,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2022-12-13 13:04:05,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:05,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2022-12-13 13:04:05,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 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) [2022-12-13 13:04:05,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 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) [2022-12-13 13:04:05,321 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 464 transitions. [2022-12-13 13:04:05,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-13 13:04:05,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 13:04:05,324 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-13 13:04:05,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-13 13:04:05,328 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-13 13:04:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-13 13:04:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:05,329 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:05,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:04:05,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -551487048, now seen corresponding path program 1 times [2022-12-13 13:04:05,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:05,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837725595] [2022-12-13 13:04:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:05,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:05,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837725595] [2022-12-13 13:04:05,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837725595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:05,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:05,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:04:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30102008] [2022-12-13 13:04:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:05,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:05,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 357 [2022-12-13 13:04:05,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:05,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 357 [2022-12-13 13:04:05,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:05,518 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2022-12-13 13:04:05,518 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:04:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 311 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2022-12-13 13:04:05,519 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2022-12-13 13:04:05,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2022-12-13 13:04:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2022-12-13 13:04:05,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-12-13 13:04:05,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2022-12-13 13:04:05,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2022-12-13 13:04:05,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:05,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2022-12-13 13:04:05,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 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) [2022-12-13 13:04:05,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 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) [2022-12-13 13:04:05,525 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 476 transitions. [2022-12-13 13:04:05,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2022-12-13 13:04:05,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:05,526 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2022-12-13 13:04:05,526 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2022-12-13 13:04:05,527 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-12-13 13:04:05,527 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2022-12-13 13:04:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:05,527 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:05,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:04:05,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1369076681, now seen corresponding path program 1 times [2022-12-13 13:04:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:05,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248109151] [2022-12-13 13:04:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:05,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:05,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248109151] [2022-12-13 13:04:05,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248109151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:05,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:05,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:04:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42004904] [2022-12-13 13:04:05,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:04:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:04:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:04:05,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2022-12-13 13:04:05,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:05,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2022-12-13 13:04:05,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:05,860 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2022-12-13 13:04:05,861 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-12-13 13:04:05,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 569 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2022-12-13 13:04:05,862 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2022-12-13 13:04:05,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2022-12-13 13:04:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:04:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:04:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 766 transitions. [2022-12-13 13:04:05,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4291316526610644 [2022-12-13 13:04:05,865 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 766 transitions. [2022-12-13 13:04:05,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 766 transitions. [2022-12-13 13:04:05,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:05,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 766 transitions. [2022-12-13 13:04:05,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,870 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,870 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 766 transitions. [2022-12-13 13:04:05,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2022-12-13 13:04:05,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:05,871 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2022-12-13 13:04:05,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-12-13 13:04:05,871 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-12-13 13:04:05,871 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2022-12-13 13:04:05,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:05,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:05,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:04:05,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:05,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash -111617161, now seen corresponding path program 2 times [2022-12-13 13:04:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:05,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429883491] [2022-12-13 13:04:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:05,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:05,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429883491] [2022-12-13 13:04:05,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429883491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:05,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:05,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:04:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936205992] [2022-12-13 13:04:05,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:05,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:04:05,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:04:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:04:05,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 357 [2022-12-13 13:04:05,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:05,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:05,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 357 [2022-12-13 13:04:05,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:06,066 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2022-12-13 13:04:06,066 INFO L131 PetriNetUnfolder]: For 119/130 co-relation queries the response was YES. [2022-12-13 13:04:06,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 119/130 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 510 event pairs, 24 based on Foata normal form. 7/164 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2022-12-13 13:04:06,068 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2022-12-13 13:04:06,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2022-12-13 13:04:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:04:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:04:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2022-12-13 13:04:06,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4369747899159664 [2022-12-13 13:04:06,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2022-12-13 13:04:06,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2022-12-13 13:04:06,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:06,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2022-12-13 13:04:06,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,077 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,077 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 624 transitions. [2022-12-13 13:04:06,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2022-12-13 13:04:06,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:06,080 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2022-12-13 13:04:06,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2022-12-13 13:04:06,080 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2022-12-13 13:04:06,081 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2022-12-13 13:04:06,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:06,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:06,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:04:06,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1220963132, now seen corresponding path program 1 times [2022-12-13 13:04:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929110930] [2022-12-13 13:04:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:06,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929110930] [2022-12-13 13:04:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929110930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:06,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:06,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:04:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999954462] [2022-12-13 13:04:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:04:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:04:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:04:06,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:04:06,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:06,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:04:06,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:06,344 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2022-12-13 13:04:06,344 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-12-13 13:04:06,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 628 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2022-12-13 13:04:06,346 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2022-12-13 13:04:06,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2022-12-13 13:04:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:04:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:04:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2022-12-13 13:04:06,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42436974789915966 [2022-12-13 13:04:06,349 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2022-12-13 13:04:06,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2022-12-13 13:04:06,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:06,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2022-12-13 13:04:06,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,358 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,358 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 909 transitions. [2022-12-13 13:04:06,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2022-12-13 13:04:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:06,360 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2022-12-13 13:04:06,360 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2022-12-13 13:04:06,361 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2022-12-13 13:04:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2022-12-13 13:04:06,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:06,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:04:06,362 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2031742845, now seen corresponding path program 3 times [2022-12-13 13:04:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:06,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956576898] [2022-12-13 13:04:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:06,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956576898] [2022-12-13 13:04:06,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956576898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:06,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:06,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:04:06,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817135228] [2022-12-13 13:04:06,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:06,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:04:06,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:04:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:04:06,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 357 [2022-12-13 13:04:06,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:06,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 357 [2022-12-13 13:04:06,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:06,530 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2022-12-13 13:04:06,530 INFO L131 PetriNetUnfolder]: For 343/346 co-relation queries the response was YES. [2022-12-13 13:04:06,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 343/346 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 516 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2022-12-13 13:04:06,532 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2022-12-13 13:04:06,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2022-12-13 13:04:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:04:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:04:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2022-12-13 13:04:06,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2022-12-13 13:04:06,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2022-12-13 13:04:06,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2022-12-13 13:04:06,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:06,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2022-12-13 13:04:06,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,537 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 623 transitions. [2022-12-13 13:04:06,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2022-12-13 13:04:06,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:06,539 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2022-12-13 13:04:06,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2022-12-13 13:04:06,540 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2022-12-13 13:04:06,540 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2022-12-13 13:04:06,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:06,540 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:06,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:04:06,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:06,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2117454944, now seen corresponding path program 2 times [2022-12-13 13:04:06,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:06,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251950328] [2022-12-13 13:04:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:06,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:06,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251950328] [2022-12-13 13:04:06,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251950328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:06,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:06,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:04:06,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521638831] [2022-12-13 13:04:06,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:06,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:04:06,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:04:06,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:04:06,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2022-12-13 13:04:06,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:06,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2022-12-13 13:04:06,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:06,776 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2022-12-13 13:04:06,776 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2022-12-13 13:04:06,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 428 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2022-12-13 13:04:06,778 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2022-12-13 13:04:06,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2022-12-13 13:04:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:04:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:04:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 912 transitions. [2022-12-13 13:04:06,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4257703081232493 [2022-12-13 13:04:06,780 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 912 transitions. [2022-12-13 13:04:06,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 912 transitions. [2022-12-13 13:04:06,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:06,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 912 transitions. [2022-12-13 13:04:06,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.0) internal successors, (912), 6 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,783 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,783 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 912 transitions. [2022-12-13 13:04:06,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2022-12-13 13:04:06,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:06,785 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2022-12-13 13:04:06,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-12-13 13:04:06,786 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2022-12-13 13:04:06,786 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2022-12-13 13:04:06,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:06,786 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:06,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:04:06,786 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2003819548, now seen corresponding path program 3 times [2022-12-13 13:04:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:06,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987900984] [2022-12-13 13:04:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:06,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:06,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987900984] [2022-12-13 13:04:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987900984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:06,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:04:06,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354703864] [2022-12-13 13:04:06,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:06,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:04:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:04:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:04:06,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2022-12-13 13:04:06,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:06,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:06,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2022-12-13 13:04:06,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:07,026 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2022-12-13 13:04:07,027 INFO L131 PetriNetUnfolder]: For 580/580 co-relation queries the response was YES. [2022-12-13 13:04:07,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 523 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2022-12-13 13:04:07,029 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2022-12-13 13:04:07,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2022-12-13 13:04:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:04:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:04:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2022-12-13 13:04:07,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4257703081232493 [2022-12-13 13:04:07,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2022-12-13 13:04:07,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2022-12-13 13:04:07,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:07,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2022-12-13 13:04:07,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,034 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 760 transitions. [2022-12-13 13:04:07,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2022-12-13 13:04:07,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 13:04:07,036 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2022-12-13 13:04:07,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2022-12-13 13:04:07,036 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2022-12-13 13:04:07,036 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2022-12-13 13:04:07,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:07,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:07,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:04:07,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash -133219542, now seen corresponding path program 4 times [2022-12-13 13:04:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:07,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807895983] [2022-12-13 13:04:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:07,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:07,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807895983] [2022-12-13 13:04:07,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807895983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78340348] [2022-12-13 13:04:07,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:04:07,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:07,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:07,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:04:07,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:04:07,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:04:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:07,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:07,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78340348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:07,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:07,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-12-13 13:04:07,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753466585] [2022-12-13 13:04:07,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:04:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:04:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:04:07,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:04:07,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 147.375) internal successors, (1179), 8 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:07,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:04:07,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:07,533 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2022-12-13 13:04:07,533 INFO L131 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-12-13 13:04:07,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 621 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2022-12-13 13:04:07,536 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2022-12-13 13:04:07,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2022-12-13 13:04:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:04:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:04:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1056 transitions. [2022-12-13 13:04:07,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4225690276110444 [2022-12-13 13:04:07,538 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1056 transitions. [2022-12-13 13:04:07,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1056 transitions. [2022-12-13 13:04:07,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:07,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1056 transitions. [2022-12-13 13:04:07,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 150.85714285714286) internal successors, (1056), 7 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 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) [2022-12-13 13:04:07,542 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 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) [2022-12-13 13:04:07,542 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1056 transitions. [2022-12-13 13:04:07,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2022-12-13 13:04:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:07,545 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2022-12-13 13:04:07,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2022-12-13 13:04:07,545 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2022-12-13 13:04:07,545 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2022-12-13 13:04:07,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.375) internal successors, (1179), 8 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:07,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:07,546 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:07,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:04:07,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:07,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1688528618, now seen corresponding path program 5 times [2022-12-13 13:04:07,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:07,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721302479] [2022-12-13 13:04:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:07,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:07,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:07,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721302479] [2022-12-13 13:04:07,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721302479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:07,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647237568] [2022-12-13 13:04:07,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:04:07,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:07,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:07,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:04:07,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:04:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:07,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:04:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:08,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:08,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647237568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:08,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:08,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 13:04:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021722930] [2022-12-13 13:04:08,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:08,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:04:08,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:04:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:04:08,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:04:08,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 146.55555555555554) internal successors, (1319), 9 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:08,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:08,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:04:08,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:08,260 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2022-12-13 13:04:08,260 INFO L131 PetriNetUnfolder]: For 860/860 co-relation queries the response was YES. [2022-12-13 13:04:08,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 860/860 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 553 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2022-12-13 13:04:08,262 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2022-12-13 13:04:08,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2022-12-13 13:04:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:04:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:04:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 756 transitions. [2022-12-13 13:04:08,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2022-12-13 13:04:08,264 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 756 transitions. [2022-12-13 13:04:08,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 756 transitions. [2022-12-13 13:04:08,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:08,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 756 transitions. [2022-12-13 13:04:08,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.2) internal successors, (756), 5 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:08,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:08,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:08,270 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 756 transitions. [2022-12-13 13:04:08,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2022-12-13 13:04:08,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-13 13:04:08,274 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2022-12-13 13:04:08,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2022-12-13 13:04:08,275 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2022-12-13 13:04:08,275 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2022-12-13 13:04:08,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 146.55555555555554) internal successors, (1319), 9 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:08,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:08,276 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:08,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:04:08,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 13:04:08,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash 15997219, now seen corresponding path program 1 times [2022-12-13 13:04:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:08,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698790875] [2022-12-13 13:04:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698790875] [2022-12-13 13:04:08,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698790875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:08,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512747110] [2022-12-13 13:04:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:08,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:08,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:04:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 13:04:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:08,798 INFO L321 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-12-13 13:04:08,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2022-12-13 13:04:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:08,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:08,913 INFO L321 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2022-12-13 13:04:08,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 49 [2022-12-13 13:04:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:09,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512747110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:09,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:09,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2022-12-13 13:04:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609748142] [2022-12-13 13:04:09,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:04:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:04:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:04:09,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 357 [2022-12-13 13:04:09,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 13 states, 13 states have (on average 132.30769230769232) internal successors, (1720), 13 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:09,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:09,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 357 [2022-12-13 13:04:09,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:10,077 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2022-12-13 13:04:10,077 INFO L131 PetriNetUnfolder]: For 1759/1801 co-relation queries the response was YES. [2022-12-13 13:04:10,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1759/1801 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2083 event pairs, 10 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2022-12-13 13:04:10,079 INFO L137 encePairwiseOnDemand]: 348/357 looper letters, 39 selfloop transitions, 22 changer transitions 82/146 dead transitions. [2022-12-13 13:04:10,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1260 flow [2022-12-13 13:04:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 13:04:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 13:04:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2829 transitions. [2022-12-13 13:04:10,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37735094037615047 [2022-12-13 13:04:10,084 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2829 transitions. [2022-12-13 13:04:10,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2829 transitions. [2022-12-13 13:04:10,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:10,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2829 transitions. [2022-12-13 13:04:10,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 134.71428571428572) internal successors, (2829), 21 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 357.0) internal successors, (7854), 22 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,095 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 357.0) internal successors, (7854), 22 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,095 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 21 states and 2829 transitions. [2022-12-13 13:04:10,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1260 flow [2022-12-13 13:04:10,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 146 transitions, 1148 flow, removed 16 selfloop flow, removed 5 redundant places. [2022-12-13 13:04:10,100 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 429 flow [2022-12-13 13:04:10,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=429, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2022-12-13 13:04:10,101 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2022-12-13 13:04:10,101 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 429 flow [2022-12-13 13:04:10,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 132.30769230769232) internal successors, (1720), 13 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:10,102 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:10,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:04:10,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 13:04:10,302 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2075114609, now seen corresponding path program 2 times [2022-12-13 13:04:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:10,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031729491] [2022-12-13 13:04:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031729491] [2022-12-13 13:04:10,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031729491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692735455] [2022-12-13 13:04:10,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:04:10,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:10,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:10,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:04:11,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:04:11,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 13:04:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:11,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 13:04:11,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:04:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:04:11,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 13:04:11,280 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 13:04:11,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2022-12-13 13:04:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:11,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:11,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:11,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 97 [2022-12-13 13:04:11,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:11,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 680 treesize of output 648 [2022-12-13 13:04:11,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:11,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 548 treesize of output 536 [2022-12-13 13:04:11,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:11,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 342 treesize of output 278 [2022-12-13 13:04:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692735455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:13,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:13,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-13 13:04:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917465159] [2022-12-13 13:04:13,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 13:04:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 13:04:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=376, Unknown=1, NotChecked=0, Total=462 [2022-12-13 13:04:16,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:19,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:21,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:21,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 357 [2022-12-13 13:04:21,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 429 flow. Second operand has 22 states, 22 states have (on average 112.9090909090909) internal successors, (2484), 22 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:21,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:21,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 357 [2022-12-13 13:04:21,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:22,429 INFO L130 PetriNetUnfolder]: 236/435 cut-off events. [2022-12-13 13:04:22,430 INFO L131 PetriNetUnfolder]: For 2986/3039 co-relation queries the response was YES. [2022-12-13 13:04:22,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2457 conditions, 435 events. 236/435 cut-off events. For 2986/3039 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1662 event pairs, 18 based on Foata normal form. 32/451 useless extension candidates. Maximal degree in co-relation 2419. Up to 208 conditions per place. [2022-12-13 13:04:22,432 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 53 selfloop transitions, 37 changer transitions 27/123 dead transitions. [2022-12-13 13:04:22,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 123 transitions, 1283 flow [2022-12-13 13:04:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:04:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 13:04:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1864 transitions. [2022-12-13 13:04:22,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32633053221288516 [2022-12-13 13:04:22,436 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1864 transitions. [2022-12-13 13:04:22,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1864 transitions. [2022-12-13 13:04:22,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:22,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1864 transitions. [2022-12-13 13:04:22,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 116.5) internal successors, (1864), 16 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:22,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:22,448 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:22,448 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 429 flow. Second operand 16 states and 1864 transitions. [2022-12-13 13:04:22,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 123 transitions, 1283 flow [2022-12-13 13:04:22,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 123 transitions, 1036 flow, removed 91 selfloop flow, removed 13 redundant places. [2022-12-13 13:04:22,457 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 674 flow [2022-12-13 13:04:22,457 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=674, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-12-13 13:04:22,457 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2022-12-13 13:04:22,458 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 674 flow [2022-12-13 13:04:22,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 112.9090909090909) internal successors, (2484), 22 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:22,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:22,459 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:22,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:04:22,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:22,660 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1793896208, now seen corresponding path program 3 times [2022-12-13 13:04:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17850834] [2022-12-13 13:04:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:23,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17850834] [2022-12-13 13:04:23,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17850834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012357751] [2022-12-13 13:04:23,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:04:23,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:23,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:23,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:23,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:04:23,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 13:04:23,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:04:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:23,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:23,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-13 13:04:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:23,926 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-13 13:04:23,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-12-13 13:04:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:04:23,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012357751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:23,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:23,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 14 [2022-12-13 13:04:23,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045598343] [2022-12-13 13:04:23,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:23,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:04:23,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:23,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:04:23,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:04:24,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 357 [2022-12-13 13:04:24,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 674 flow. Second operand has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:24,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:24,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 357 [2022-12-13 13:04:24,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:24,899 INFO L130 PetriNetUnfolder]: 277/500 cut-off events. [2022-12-13 13:04:24,899 INFO L131 PetriNetUnfolder]: For 2108/2158 co-relation queries the response was YES. [2022-12-13 13:04:24,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 500 events. 277/500 cut-off events. For 2108/2158 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1947 event pairs, 30 based on Foata normal form. 29/518 useless extension candidates. Maximal degree in co-relation 2552. Up to 306 conditions per place. [2022-12-13 13:04:24,902 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 71 selfloop transitions, 40 changer transitions 1/118 dead transitions. [2022-12-13 13:04:24,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 1212 flow [2022-12-13 13:04:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:04:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:04:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1666 transitions. [2022-12-13 13:04:24,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2022-12-13 13:04:24,905 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1666 transitions. [2022-12-13 13:04:24,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1666 transitions. [2022-12-13 13:04:24,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:24,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1666 transitions. [2022-12-13 13:04:24,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 138.83333333333334) internal successors, (1666), 12 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:24,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:24,911 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:24,911 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 674 flow. Second operand 12 states and 1666 transitions. [2022-12-13 13:04:24,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 1212 flow [2022-12-13 13:04:24,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 118 transitions, 1128 flow, removed 40 selfloop flow, removed 4 redundant places. [2022-12-13 13:04:24,917 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 936 flow [2022-12-13 13:04:24,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=936, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2022-12-13 13:04:24,917 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2022-12-13 13:04:24,918 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 936 flow [2022-12-13 13:04:24,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 135.375) internal successors, (2166), 16 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:24,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:24,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:24,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:04:25,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 13:04:25,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1621553762, now seen corresponding path program 4 times [2022-12-13 13:04:25,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:25,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179003909] [2022-12-13 13:04:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:25,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179003909] [2022-12-13 13:04:25,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179003909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892371192] [2022-12-13 13:04:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:04:25,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:25,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:25,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:04:25,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:04:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 13:04:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:26,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:26,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-13 13:04:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:26,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:26,082 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-13 13:04:26,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-12-13 13:04:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:26,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892371192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:26,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:26,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2022-12-13 13:04:26,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646651073] [2022-12-13 13:04:26,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:04:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:04:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:04:26,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 357 [2022-12-13 13:04:26,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 936 flow. Second operand has 17 states, 17 states have (on average 135.35294117647058) internal successors, (2301), 17 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:26,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:26,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 357 [2022-12-13 13:04:26,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:27,295 INFO L130 PetriNetUnfolder]: 391/700 cut-off events. [2022-12-13 13:04:27,295 INFO L131 PetriNetUnfolder]: For 3698/3765 co-relation queries the response was YES. [2022-12-13 13:04:27,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 700 events. 391/700 cut-off events. For 3698/3765 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3058 event pairs, 58 based on Foata normal form. 33/716 useless extension candidates. Maximal degree in co-relation 3302. Up to 479 conditions per place. [2022-12-13 13:04:27,299 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 99 selfloop transitions, 42 changer transitions 1/148 dead transitions. [2022-12-13 13:04:27,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1626 flow [2022-12-13 13:04:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:04:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 13:04:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2209 transitions. [2022-12-13 13:04:27,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3867296918767507 [2022-12-13 13:04:27,302 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2209 transitions. [2022-12-13 13:04:27,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2209 transitions. [2022-12-13 13:04:27,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:27,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2209 transitions. [2022-12-13 13:04:27,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 138.0625) internal successors, (2209), 16 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:27,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:27,308 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:27,308 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 936 flow. Second operand 16 states and 2209 transitions. [2022-12-13 13:04:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1626 flow [2022-12-13 13:04:27,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 148 transitions, 1536 flow, removed 39 selfloop flow, removed 3 redundant places. [2022-12-13 13:04:27,316 INFO L231 Difference]: Finished difference. Result has 94 places, 110 transitions, 1249 flow [2022-12-13 13:04:27,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1249, PETRI_PLACES=94, PETRI_TRANSITIONS=110} [2022-12-13 13:04:27,316 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2022-12-13 13:04:27,316 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 110 transitions, 1249 flow [2022-12-13 13:04:27,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 135.35294117647058) internal successors, (2301), 17 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:27,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:27,317 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:27,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:04:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 13:04:27,518 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1817131782, now seen corresponding path program 5 times [2022-12-13 13:04:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:27,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300388301] [2022-12-13 13:04:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300388301] [2022-12-13 13:04:28,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300388301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947641516] [2022-12-13 13:04:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:04:28,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:28,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:28,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:28,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:04:28,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:04:28,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 13:04:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:04:28,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 13:04:28,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 13:04:28,478 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2022-12-13 13:04:28,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2022-12-13 13:04:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:28,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:28,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:28,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2022-12-13 13:04:28,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:28,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 52 [2022-12-13 13:04:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:28,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947641516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:28,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:28,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2022-12-13 13:04:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768643905] [2022-12-13 13:04:28,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 13:04:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 13:04:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=357, Unknown=1, NotChecked=0, Total=420 [2022-12-13 13:04:30,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:33,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:35,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:37,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:39,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:41,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:43,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:46,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:48,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:48,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 357 [2022-12-13 13:04:48,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 110 transitions, 1249 flow. Second operand has 21 states, 21 states have (on average 115.71428571428571) internal successors, (2430), 21 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:48,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 357 [2022-12-13 13:04:48,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:48,949 INFO L130 PetriNetUnfolder]: 478/859 cut-off events. [2022-12-13 13:04:48,949 INFO L131 PetriNetUnfolder]: For 4537/4613 co-relation queries the response was YES. [2022-12-13 13:04:48,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 859 events. 478/859 cut-off events. For 4537/4613 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3964 event pairs, 54 based on Foata normal form. 37/882 useless extension candidates. Maximal degree in co-relation 4520. Up to 516 conditions per place. [2022-12-13 13:04:48,954 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 96 selfloop transitions, 63 changer transitions 1/166 dead transitions. [2022-12-13 13:04:48,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 166 transitions, 1994 flow [2022-12-13 13:04:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:04:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 13:04:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1557 transitions. [2022-12-13 13:04:48,956 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3354880413703943 [2022-12-13 13:04:48,956 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1557 transitions. [2022-12-13 13:04:48,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1557 transitions. [2022-12-13 13:04:48,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:48,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1557 transitions. [2022-12-13 13:04:48,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 119.76923076923077) internal successors, (1557), 13 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 357.0) internal successors, (4998), 14 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,962 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 357.0) internal successors, (4998), 14 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,963 INFO L175 Difference]: Start difference. First operand has 94 places, 110 transitions, 1249 flow. Second operand 13 states and 1557 transitions. [2022-12-13 13:04:48,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 166 transitions, 1994 flow [2022-12-13 13:04:48,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 166 transitions, 1855 flow, removed 58 selfloop flow, removed 5 redundant places. [2022-12-13 13:04:48,979 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 1595 flow [2022-12-13 13:04:48,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1595, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2022-12-13 13:04:48,980 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2022-12-13 13:04:48,980 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 1595 flow [2022-12-13 13:04:48,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 115.71428571428571) internal successors, (2430), 21 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:48,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:48,980 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:48,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:04:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 13:04:49,182 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1903733796, now seen corresponding path program 6 times [2022-12-13 13:04:49,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931767728] [2022-12-13 13:04:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:49,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931767728] [2022-12-13 13:04:50,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931767728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:50,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898790048] [2022-12-13 13:04:50,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:04:50,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:50,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:50,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:04:50,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 13:04:50,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:50,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 13:04:50,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:04:50,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-12-13 13:04:50,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:50,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-13 13:04:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:50,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:50,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:50,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 112 [2022-12-13 13:04:50,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:04:50,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-12-13 13:04:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:50,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898790048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:50,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:50,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2022-12-13 13:04:50,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870233892] [2022-12-13 13:04:50,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:50,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 13:04:50,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:50,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 13:04:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=322, Unknown=7, NotChecked=0, Total=380 [2022-12-13 13:04:51,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 357 [2022-12-13 13:04:51,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 1595 flow. Second operand has 20 states, 20 states have (on average 112.85) internal successors, (2257), 20 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:51,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:51,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 357 [2022-12-13 13:04:51,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:53,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:55,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:57,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:04:58,108 INFO L130 PetriNetUnfolder]: 798/1440 cut-off events. [2022-12-13 13:04:58,108 INFO L131 PetriNetUnfolder]: For 9556/9701 co-relation queries the response was YES. [2022-12-13 13:04:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8235 conditions, 1440 events. 798/1440 cut-off events. For 9556/9701 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7429 event pairs, 84 based on Foata normal form. 70/1492 useless extension candidates. Maximal degree in co-relation 8063. Up to 755 conditions per place. [2022-12-13 13:04:58,121 INFO L137 encePairwiseOnDemand]: 349/357 looper letters, 128 selfloop transitions, 104 changer transitions 1/239 dead transitions. [2022-12-13 13:04:58,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 239 transitions, 3152 flow [2022-12-13 13:04:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 13:04:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 13:04:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1991 transitions. [2022-12-13 13:04:58,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3280606360191135 [2022-12-13 13:04:58,124 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1991 transitions. [2022-12-13 13:04:58,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1991 transitions. [2022-12-13 13:04:58,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:58,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1991 transitions. [2022-12-13 13:04:58,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.11764705882354) internal successors, (1991), 17 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:58,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 357.0) internal successors, (6426), 18 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:58,130 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 357.0) internal successors, (6426), 18 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:58,130 INFO L175 Difference]: Start difference. First operand has 104 places, 131 transitions, 1595 flow. Second operand 17 states and 1991 transitions. [2022-12-13 13:04:58,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 239 transitions, 3152 flow [2022-12-13 13:04:58,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 239 transitions, 2924 flow, removed 95 selfloop flow, removed 6 redundant places. [2022-12-13 13:04:58,147 INFO L231 Difference]: Finished difference. Result has 117 places, 185 transitions, 2536 flow [2022-12-13 13:04:58,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2536, PETRI_PLACES=117, PETRI_TRANSITIONS=185} [2022-12-13 13:04:58,147 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2022-12-13 13:04:58,148 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 185 transitions, 2536 flow [2022-12-13 13:04:58,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 112.85) internal successors, (2257), 20 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:58,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:58,148 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:58,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:04:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 13:04:58,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:04:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1108202063, now seen corresponding path program 7 times [2022-12-13 13:04:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:58,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359580638] [2022-12-13 13:04:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:58,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359580638] [2022-12-13 13:04:58,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359580638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:58,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029616682] [2022-12-13 13:04:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:04:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:58,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:58,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:04:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:04:58,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:58,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:04:58,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029616682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:58,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:58,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:04:58,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187932547] [2022-12-13 13:04:58,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:58,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:04:58,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:04:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:04:59,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:04:59,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 185 transitions, 2536 flow. Second operand has 18 states, 18 states have (on average 146.05555555555554) internal successors, (2629), 18 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:59,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:59,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:04:59,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:01,072 INFO L130 PetriNetUnfolder]: 1275/2369 cut-off events. [2022-12-13 13:05:01,072 INFO L131 PetriNetUnfolder]: For 15919/15919 co-relation queries the response was YES. [2022-12-13 13:05:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13459 conditions, 2369 events. 1275/2369 cut-off events. For 15919/15919 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14386 event pairs, 134 based on Foata normal form. 20/2389 useless extension candidates. Maximal degree in co-relation 13275. Up to 831 conditions per place. [2022-12-13 13:05:01,086 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 238 selfloop transitions, 167 changer transitions 24/429 dead transitions. [2022-12-13 13:05:01,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 429 transitions, 6004 flow [2022-12-13 13:05:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 13:05:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 13:05:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3751 transitions. [2022-12-13 13:05:01,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4202801120448179 [2022-12-13 13:05:01,089 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3751 transitions. [2022-12-13 13:05:01,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3751 transitions. [2022-12-13 13:05:01,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:01,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3751 transitions. [2022-12-13 13:05:01,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 150.04) internal successors, (3751), 25 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:01,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 357.0) internal successors, (9282), 26 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:01,100 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 357.0) internal successors, (9282), 26 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:01,100 INFO L175 Difference]: Start difference. First operand has 117 places, 185 transitions, 2536 flow. Second operand 25 states and 3751 transitions. [2022-12-13 13:05:01,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 429 transitions, 6004 flow [2022-12-13 13:05:01,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 429 transitions, 5626 flow, removed 163 selfloop flow, removed 7 redundant places. [2022-12-13 13:05:01,135 INFO L231 Difference]: Finished difference. Result has 146 places, 287 transitions, 4253 flow [2022-12-13 13:05:01,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4253, PETRI_PLACES=146, PETRI_TRANSITIONS=287} [2022-12-13 13:05:01,136 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2022-12-13 13:05:01,136 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 287 transitions, 4253 flow [2022-12-13 13:05:01,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 146.05555555555554) internal successors, (2629), 18 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:01,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:01,137 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:01,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 13:05:01,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 13:05:01,339 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash -587047631, now seen corresponding path program 8 times [2022-12-13 13:05:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:01,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116819878] [2022-12-13 13:05:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:01,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:01,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:01,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116819878] [2022-12-13 13:05:01,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116819878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:01,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161456648] [2022-12-13 13:05:01,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:05:01,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:01,572 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:01,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:05:01,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:05:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:01,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:01,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161456648] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:01,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:01,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:05:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177674396] [2022-12-13 13:05:01,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:05:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:05:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:05:02,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:02,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 287 transitions, 4253 flow. Second operand has 17 states, 17 states have (on average 146.0) internal successors, (2482), 17 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:02,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:02,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:03,536 INFO L130 PetriNetUnfolder]: 1204/2305 cut-off events. [2022-12-13 13:05:03,536 INFO L131 PetriNetUnfolder]: For 19021/19021 co-relation queries the response was YES. [2022-12-13 13:05:03,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14698 conditions, 2305 events. 1204/2305 cut-off events. For 19021/19021 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14475 event pairs, 114 based on Foata normal form. 36/2341 useless extension candidates. Maximal degree in co-relation 14536. Up to 779 conditions per place. [2022-12-13 13:05:03,550 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 251 selfloop transitions, 162 changer transitions 21/434 dead transitions. [2022-12-13 13:05:03,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 434 transitions, 6526 flow [2022-12-13 13:05:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:05:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 13:05:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3442 transitions. [2022-12-13 13:05:03,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41919376446230666 [2022-12-13 13:05:03,562 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3442 transitions. [2022-12-13 13:05:03,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3442 transitions. [2022-12-13 13:05:03,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:03,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3442 transitions. [2022-12-13 13:05:03,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 149.65217391304347) internal successors, (3442), 23 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:03,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 357.0) internal successors, (8568), 24 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:03,568 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 357.0) internal successors, (8568), 24 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:03,568 INFO L175 Difference]: Start difference. First operand has 146 places, 287 transitions, 4253 flow. Second operand 23 states and 3442 transitions. [2022-12-13 13:05:03,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 434 transitions, 6526 flow [2022-12-13 13:05:03,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 434 transitions, 6097 flow, removed 180 selfloop flow, removed 3 redundant places. [2022-12-13 13:05:03,623 INFO L231 Difference]: Finished difference. Result has 172 places, 313 transitions, 4684 flow [2022-12-13 13:05:03,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4684, PETRI_PLACES=172, PETRI_TRANSITIONS=313} [2022-12-13 13:05:03,624 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2022-12-13 13:05:03,624 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 313 transitions, 4684 flow [2022-12-13 13:05:03,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 146.0) internal successors, (2482), 17 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:03,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:03,624 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:03,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 13:05:03,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 13:05:03,826 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1905023002, now seen corresponding path program 9 times [2022-12-13 13:05:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:03,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57773403] [2022-12-13 13:05:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57773403] [2022-12-13 13:05:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57773403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105791194] [2022-12-13 13:05:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:05:04,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:04,021 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:04,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:05:04,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:05:04,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:04,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105791194] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:04,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:04,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-13 13:05:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830088693] [2022-12-13 13:05:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:05:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:04,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:05:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:05:04,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:04,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 313 transitions, 4684 flow. Second operand has 15 states, 15 states have (on average 146.4) internal successors, (2196), 15 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:04,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:04,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:04,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:05,980 INFO L130 PetriNetUnfolder]: 1201/2290 cut-off events. [2022-12-13 13:05:05,980 INFO L131 PetriNetUnfolder]: For 20246/20246 co-relation queries the response was YES. [2022-12-13 13:05:05,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15602 conditions, 2290 events. 1201/2290 cut-off events. For 20246/20246 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14006 event pairs, 153 based on Foata normal form. 40/2330 useless extension candidates. Maximal degree in co-relation 15384. Up to 942 conditions per place. [2022-12-13 13:05:05,993 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 258 selfloop transitions, 128 changer transitions 8/394 dead transitions. [2022-12-13 13:05:05,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 394 transitions, 6361 flow [2022-12-13 13:05:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:05:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 13:05:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1671 transitions. [2022-12-13 13:05:05,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4255156608097785 [2022-12-13 13:05:05,995 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1671 transitions. [2022-12-13 13:05:05,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1671 transitions. [2022-12-13 13:05:05,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:05,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1671 transitions. [2022-12-13 13:05:05,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 151.9090909090909) internal successors, (1671), 11 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:05,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 357.0) internal successors, (4284), 12 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) [2022-12-13 13:05:05,999 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 357.0) internal successors, (4284), 12 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) [2022-12-13 13:05:05,999 INFO L175 Difference]: Start difference. First operand has 172 places, 313 transitions, 4684 flow. Second operand 11 states and 1671 transitions. [2022-12-13 13:05:05,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 394 transitions, 6361 flow [2022-12-13 13:05:06,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 394 transitions, 5845 flow, removed 207 selfloop flow, removed 8 redundant places. [2022-12-13 13:05:06,092 INFO L231 Difference]: Finished difference. Result has 175 places, 319 transitions, 4603 flow [2022-12-13 13:05:06,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4603, PETRI_PLACES=175, PETRI_TRANSITIONS=319} [2022-12-13 13:05:06,093 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2022-12-13 13:05:06,093 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 319 transitions, 4603 flow [2022-12-13 13:05:06,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.4) internal successors, (2196), 15 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:06,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:06,093 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:06,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 13:05:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:06,295 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1531502783, now seen corresponding path program 10 times [2022-12-13 13:05:06,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:06,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205107003] [2022-12-13 13:05:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:06,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:06,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205107003] [2022-12-13 13:05:06,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205107003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:06,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99396055] [2022-12-13 13:05:06,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:05:06,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:06,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:06,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:06,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 13:05:06,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:05:06,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:06,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:06,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:06,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99396055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:06,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:06,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 13:05:06,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779155794] [2022-12-13 13:05:06,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:06,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 13:05:06,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:06,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 13:05:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:05:07,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:07,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 319 transitions, 4603 flow. Second operand has 19 states, 19 states have (on average 145.78947368421052) internal successors, (2770), 19 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:07,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:07,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:07,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:09,067 INFO L130 PetriNetUnfolder]: 1123/2138 cut-off events. [2022-12-13 13:05:09,068 INFO L131 PetriNetUnfolder]: For 19762/19762 co-relation queries the response was YES. [2022-12-13 13:05:09,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14237 conditions, 2138 events. 1123/2138 cut-off events. For 19762/19762 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12968 event pairs, 230 based on Foata normal form. 104/2242 useless extension candidates. Maximal degree in co-relation 14174. Up to 1171 conditions per place. [2022-12-13 13:05:09,080 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 189 selfloop transitions, 224 changer transitions 2/415 dead transitions. [2022-12-13 13:05:09,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 415 transitions, 6508 flow [2022-12-13 13:05:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 13:05:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 13:05:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3301 transitions. [2022-12-13 13:05:09,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42029539088362616 [2022-12-13 13:05:09,083 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3301 transitions. [2022-12-13 13:05:09,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3301 transitions. [2022-12-13 13:05:09,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:09,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3301 transitions. [2022-12-13 13:05:09,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 150.04545454545453) internal successors, (3301), 22 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 357.0) internal successors, (8211), 23 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,089 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 357.0) internal successors, (8211), 23 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,090 INFO L175 Difference]: Start difference. First operand has 175 places, 319 transitions, 4603 flow. Second operand 22 states and 3301 transitions. [2022-12-13 13:05:09,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 415 transitions, 6508 flow [2022-12-13 13:05:09,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 415 transitions, 5955 flow, removed 106 selfloop flow, removed 13 redundant places. [2022-12-13 13:05:09,158 INFO L231 Difference]: Finished difference. Result has 184 places, 358 transitions, 5529 flow [2022-12-13 13:05:09,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5529, PETRI_PLACES=184, PETRI_TRANSITIONS=358} [2022-12-13 13:05:09,159 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 163 predicate places. [2022-12-13 13:05:09,159 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 358 transitions, 5529 flow [2022-12-13 13:05:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 145.78947368421052) internal successors, (2770), 19 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:09,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:09,159 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:09,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 13:05:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-13 13:05:09,360 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash -841859917, now seen corresponding path program 11 times [2022-12-13 13:05:09,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079027594] [2022-12-13 13:05:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:09,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:09,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:09,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079027594] [2022-12-13 13:05:09,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079027594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:09,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113152162] [2022-12-13 13:05:09,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:05:09,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:09,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:09,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:09,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 13:05:09,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:05:09,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:09,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:09,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:09,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113152162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:09,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:09,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:05:09,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889718051] [2022-12-13 13:05:09,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:09,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:05:09,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:05:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:05:10,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:10,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 358 transitions, 5529 flow. Second operand has 18 states, 18 states have (on average 145.88888888888889) internal successors, (2626), 18 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:10,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:10,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:10,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:12,200 INFO L130 PetriNetUnfolder]: 1112/2210 cut-off events. [2022-12-13 13:05:12,200 INFO L131 PetriNetUnfolder]: For 19581/19581 co-relation queries the response was YES. [2022-12-13 13:05:12,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14878 conditions, 2210 events. 1112/2210 cut-off events. For 19581/19581 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14081 event pairs, 132 based on Foata normal form. 30/2240 useless extension candidates. Maximal degree in co-relation 14814. Up to 734 conditions per place. [2022-12-13 13:05:12,223 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 212 selfloop transitions, 240 changer transitions 7/459 dead transitions. [2022-12-13 13:05:12,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 459 transitions, 7254 flow [2022-12-13 13:05:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 13:05:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 13:05:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4463 transitions. [2022-12-13 13:05:12,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167133520074697 [2022-12-13 13:05:12,230 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4463 transitions. [2022-12-13 13:05:12,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4463 transitions. [2022-12-13 13:05:12,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:12,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4463 transitions. [2022-12-13 13:05:12,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 148.76666666666668) internal successors, (4463), 30 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:12,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 357.0) internal successors, (11067), 31 states have internal predecessors, (11067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:12,245 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 357.0) internal successors, (11067), 31 states have internal predecessors, (11067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:12,246 INFO L175 Difference]: Start difference. First operand has 184 places, 358 transitions, 5529 flow. Second operand 30 states and 4463 transitions. [2022-12-13 13:05:12,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 459 transitions, 7254 flow [2022-12-13 13:05:12,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 459 transitions, 6815 flow, removed 179 selfloop flow, removed 5 redundant places. [2022-12-13 13:05:12,359 INFO L231 Difference]: Finished difference. Result has 208 places, 369 transitions, 5848 flow [2022-12-13 13:05:12,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5848, PETRI_PLACES=208, PETRI_TRANSITIONS=369} [2022-12-13 13:05:12,359 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2022-12-13 13:05:12,359 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 369 transitions, 5848 flow [2022-12-13 13:05:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.88888888888889) internal successors, (2626), 18 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:12,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:12,360 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:12,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 13:05:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:12,561 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -87218255, now seen corresponding path program 12 times [2022-12-13 13:05:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:12,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726731351] [2022-12-13 13:05:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:12,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726731351] [2022-12-13 13:05:12,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726731351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783041814] [2022-12-13 13:05:12,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:05:12,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:12,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:12,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:12,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 13:05:12,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 13:05:12,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:12,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:12,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:12,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:13,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783041814] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:13,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:13,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-13 13:05:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87824814] [2022-12-13 13:05:13,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:05:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:05:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:05:13,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:13,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 369 transitions, 5848 flow. Second operand has 17 states, 17 states have (on average 145.76470588235293) internal successors, (2478), 17 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:13,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:13,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:13,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:16,008 INFO L130 PetriNetUnfolder]: 1282/2532 cut-off events. [2022-12-13 13:05:16,008 INFO L131 PetriNetUnfolder]: For 22723/22723 co-relation queries the response was YES. [2022-12-13 13:05:16,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17828 conditions, 2532 events. 1282/2532 cut-off events. For 22723/22723 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16613 event pairs, 185 based on Foata normal form. 20/2552 useless extension candidates. Maximal degree in co-relation 17762. Up to 1215 conditions per place. [2022-12-13 13:05:16,023 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 280 selfloop transitions, 289 changer transitions 0/569 dead transitions. [2022-12-13 13:05:16,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 569 transitions, 9168 flow [2022-12-13 13:05:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 13:05:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 13:05:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5809 transitions. [2022-12-13 13:05:16,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41722329957624077 [2022-12-13 13:05:16,027 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5809 transitions. [2022-12-13 13:05:16,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5809 transitions. [2022-12-13 13:05:16,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:16,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5809 transitions. [2022-12-13 13:05:16,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 148.94871794871796) internal successors, (5809), 39 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:16,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 357.0) internal successors, (14280), 40 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:16,040 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 357.0) internal successors, (14280), 40 states have internal predecessors, (14280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:16,040 INFO L175 Difference]: Start difference. First operand has 208 places, 369 transitions, 5848 flow. Second operand 39 states and 5809 transitions. [2022-12-13 13:05:16,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 569 transitions, 9168 flow [2022-12-13 13:05:16,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 569 transitions, 8538 flow, removed 81 selfloop flow, removed 19 redundant places. [2022-12-13 13:05:16,147 INFO L231 Difference]: Finished difference. Result has 237 places, 464 transitions, 7590 flow [2022-12-13 13:05:16,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=5370, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7590, PETRI_PLACES=237, PETRI_TRANSITIONS=464} [2022-12-13 13:05:16,147 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2022-12-13 13:05:16,148 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 464 transitions, 7590 flow [2022-12-13 13:05:16,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.76470588235293) internal successors, (2478), 17 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:16,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:16,148 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:16,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 13:05:16,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:16,349 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1494599317, now seen corresponding path program 13 times [2022-12-13 13:05:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:16,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926153897] [2022-12-13 13:05:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:16,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926153897] [2022-12-13 13:05:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926153897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580581673] [2022-12-13 13:05:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:05:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:16,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:16,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 13:05:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:16,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:16,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580581673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:16,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:16,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:05:16,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95182361] [2022-12-13 13:05:16,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:16,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:05:16,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:16,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:05:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:05:17,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:17,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 464 transitions, 7590 flow. Second operand has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:17,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:17,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:17,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:20,344 INFO L130 PetriNetUnfolder]: 1375/2744 cut-off events. [2022-12-13 13:05:20,344 INFO L131 PetriNetUnfolder]: For 27650/27650 co-relation queries the response was YES. [2022-12-13 13:05:20,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20201 conditions, 2744 events. 1375/2744 cut-off events. For 27650/27650 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18559 event pairs, 163 based on Foata normal form. 36/2780 useless extension candidates. Maximal degree in co-relation 20125. Up to 861 conditions per place. [2022-12-13 13:05:20,360 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 320 selfloop transitions, 319 changer transitions 1/640 dead transitions. [2022-12-13 13:05:20,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 640 transitions, 10648 flow [2022-12-13 13:05:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 13:05:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 13:05:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6550 transitions. [2022-12-13 13:05:20,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41698497580850524 [2022-12-13 13:05:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6550 transitions. [2022-12-13 13:05:20,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6550 transitions. [2022-12-13 13:05:20,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:20,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6550 transitions. [2022-12-13 13:05:20,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 148.86363636363637) internal successors, (6550), 44 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:20,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 357.0) internal successors, (16065), 45 states have internal predecessors, (16065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:20,379 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 357.0) internal successors, (16065), 45 states have internal predecessors, (16065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:20,379 INFO L175 Difference]: Start difference. First operand has 237 places, 464 transitions, 7590 flow. Second operand 44 states and 6550 transitions. [2022-12-13 13:05:20,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 640 transitions, 10648 flow [2022-12-13 13:05:20,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 640 transitions, 10230 flow, removed 180 selfloop flow, removed 4 redundant places. [2022-12-13 13:05:20,532 INFO L231 Difference]: Finished difference. Result has 283 places, 514 transitions, 8888 flow [2022-12-13 13:05:20,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8888, PETRI_PLACES=283, PETRI_TRANSITIONS=514} [2022-12-13 13:05:20,532 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2022-12-13 13:05:20,532 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 514 transitions, 8888 flow [2022-12-13 13:05:20,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:20,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:20,533 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:20,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 13:05:20,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 13:05:20,734 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 910531911, now seen corresponding path program 14 times [2022-12-13 13:05:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631529525] [2022-12-13 13:05:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:20,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:20,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631529525] [2022-12-13 13:05:20,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631529525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620253157] [2022-12-13 13:05:20,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:05:20,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:20,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:20,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:20,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 13:05:21,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:05:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:21,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:21,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620253157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:21,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:21,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:05:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290603463] [2022-12-13 13:05:21,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:21,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:05:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:05:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:05:21,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:21,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 514 transitions, 8888 flow. Second operand has 18 states, 18 states have (on average 145.72222222222223) internal successors, (2623), 18 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:21,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:21,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:21,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:24,111 INFO L130 PetriNetUnfolder]: 1369/2747 cut-off events. [2022-12-13 13:05:24,111 INFO L131 PetriNetUnfolder]: For 30140/30140 co-relation queries the response was YES. [2022-12-13 13:05:24,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21231 conditions, 2747 events. 1369/2747 cut-off events. For 30140/30140 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18572 event pairs, 279 based on Foata normal form. 12/2759 useless extension candidates. Maximal degree in co-relation 21147. Up to 1508 conditions per place. [2022-12-13 13:05:24,142 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 299 selfloop transitions, 281 changer transitions 0/580 dead transitions. [2022-12-13 13:05:24,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 580 transitions, 10543 flow [2022-12-13 13:05:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 13:05:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 13:05:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3890 transitions. [2022-12-13 13:05:24,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4190907132083603 [2022-12-13 13:05:24,147 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3890 transitions. [2022-12-13 13:05:24,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3890 transitions. [2022-12-13 13:05:24,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:24,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3890 transitions. [2022-12-13 13:05:24,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 149.6153846153846) internal successors, (3890), 26 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 357.0) internal successors, (9639), 27 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,159 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 357.0) internal successors, (9639), 27 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,159 INFO L175 Difference]: Start difference. First operand has 283 places, 514 transitions, 8888 flow. Second operand 26 states and 3890 transitions. [2022-12-13 13:05:24,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 580 transitions, 10543 flow [2022-12-13 13:05:24,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 580 transitions, 9906 flow, removed 163 selfloop flow, removed 15 redundant places. [2022-12-13 13:05:24,390 INFO L231 Difference]: Finished difference. Result has 293 places, 517 transitions, 9053 flow [2022-12-13 13:05:24,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9053, PETRI_PLACES=293, PETRI_TRANSITIONS=517} [2022-12-13 13:05:24,391 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2022-12-13 13:05:24,391 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 517 transitions, 9053 flow [2022-12-13 13:05:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.72222222222223) internal successors, (2623), 18 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:24,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:24,392 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:24,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 13:05:24,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 13:05:24,593 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 910391539, now seen corresponding path program 15 times [2022-12-13 13:05:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786688009] [2022-12-13 13:05:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:24,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:24,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786688009] [2022-12-13 13:05:24,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786688009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:24,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036806673] [2022-12-13 13:05:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:05:24,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:24,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:24,793 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 13:05:24,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:05:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:24,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:24,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:24,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:25,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036806673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:25,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:25,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:05:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875545709] [2022-12-13 13:05:25,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:05:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:05:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:05:25,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:25,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 517 transitions, 9053 flow. Second operand has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:25,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:25,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:25,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:30,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:05:34,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:05:35,512 INFO L130 PetriNetUnfolder]: 1872/3856 cut-off events. [2022-12-13 13:05:35,512 INFO L131 PetriNetUnfolder]: For 42611/42611 co-relation queries the response was YES. [2022-12-13 13:05:35,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29680 conditions, 3856 events. 1872/3856 cut-off events. For 42611/42611 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28977 event pairs, 231 based on Foata normal form. 66/3922 useless extension candidates. Maximal degree in co-relation 29597. Up to 1139 conditions per place. [2022-12-13 13:05:35,537 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 450 selfloop transitions, 439 changer transitions 24/913 dead transitions. [2022-12-13 13:05:35,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 913 transitions, 16707 flow [2022-12-13 13:05:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 13:05:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 13:05:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7736 transitions. [2022-12-13 13:05:35,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167205343675932 [2022-12-13 13:05:35,543 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7736 transitions. [2022-12-13 13:05:35,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7736 transitions. [2022-12-13 13:05:35,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:35,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7736 transitions. [2022-12-13 13:05:35,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 148.76923076923077) internal successors, (7736), 52 states have internal predecessors, (7736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:35,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 357.0) internal successors, (18921), 53 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:35,560 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 357.0) internal successors, (18921), 53 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:35,560 INFO L175 Difference]: Start difference. First operand has 293 places, 517 transitions, 9053 flow. Second operand 52 states and 7736 transitions. [2022-12-13 13:05:35,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 913 transitions, 16707 flow [2022-12-13 13:05:35,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 913 transitions, 16084 flow, removed 48 selfloop flow, removed 20 redundant places. [2022-12-13 13:05:35,866 INFO L231 Difference]: Finished difference. Result has 343 places, 722 transitions, 13871 flow [2022-12-13 13:05:35,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=8628, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=13871, PETRI_PLACES=343, PETRI_TRANSITIONS=722} [2022-12-13 13:05:35,867 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 322 predicate places. [2022-12-13 13:05:35,867 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 722 transitions, 13871 flow [2022-12-13 13:05:35,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:35,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:35,867 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:35,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 13:05:36,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 13:05:36,069 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash -565850573, now seen corresponding path program 16 times [2022-12-13 13:05:36,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:36,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495154652] [2022-12-13 13:05:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:36,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:36,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495154652] [2022-12-13 13:05:36,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495154652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530108883] [2022-12-13 13:05:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:05:36,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:36,262 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 13:05:36,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:05:36,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:36,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:36,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530108883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:36,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:36,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 13:05:36,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377996568] [2022-12-13 13:05:36,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:36,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:05:36,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:05:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:05:36,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:36,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 722 transitions, 13871 flow. Second operand has 18 states, 18 states have (on average 145.72222222222223) internal successors, (2623), 18 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:36,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:36,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:36,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:43,458 INFO L130 PetriNetUnfolder]: 2118/4319 cut-off events. [2022-12-13 13:05:43,458 INFO L131 PetriNetUnfolder]: For 54630/54630 co-relation queries the response was YES. [2022-12-13 13:05:43,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 4319 events. 2118/4319 cut-off events. For 54630/54630 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32939 event pairs, 310 based on Foata normal form. 78/4397 useless extension candidates. Maximal degree in co-relation 36275. Up to 2001 conditions per place. [2022-12-13 13:05:43,499 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 426 selfloop transitions, 591 changer transitions 0/1017 dead transitions. [2022-12-13 13:05:43,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1017 transitions, 20763 flow [2022-12-13 13:05:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 13:05:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-13 13:05:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8305 transitions. [2022-12-13 13:05:43,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41541616646658663 [2022-12-13 13:05:43,508 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8305 transitions. [2022-12-13 13:05:43,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8305 transitions. [2022-12-13 13:05:43,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:43,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8305 transitions. [2022-12-13 13:05:43,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 148.30357142857142) internal successors, (8305), 56 states have internal predecessors, (8305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:43,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 357.0) internal successors, (20349), 57 states have internal predecessors, (20349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:43,533 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 357.0) internal successors, (20349), 57 states have internal predecessors, (20349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:43,533 INFO L175 Difference]: Start difference. First operand has 343 places, 722 transitions, 13871 flow. Second operand 56 states and 8305 transitions. [2022-12-13 13:05:43,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1017 transitions, 20763 flow [2022-12-13 13:05:44,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1017 transitions, 19467 flow, removed 541 selfloop flow, removed 11 redundant places. [2022-12-13 13:05:44,126 INFO L231 Difference]: Finished difference. Result has 405 places, 891 transitions, 18265 flow [2022-12-13 13:05:44,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=12972, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=18265, PETRI_PLACES=405, PETRI_TRANSITIONS=891} [2022-12-13 13:05:44,127 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 384 predicate places. [2022-12-13 13:05:44,127 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 891 transitions, 18265 flow [2022-12-13 13:05:44,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.72222222222223) internal successors, (2623), 18 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:44,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:44,127 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:44,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 13:05:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:44,329 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 354029763, now seen corresponding path program 17 times [2022-12-13 13:05:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753778139] [2022-12-13 13:05:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:44,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:44,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:44,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753778139] [2022-12-13 13:05:44,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753778139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:44,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021811037] [2022-12-13 13:05:44,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:05:44,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:44,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:44,571 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:44,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 13:05:44,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 13:05:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:44,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:44,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:44,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021811037] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:44,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:44,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:05:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775527126] [2022-12-13 13:05:44,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:44,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:05:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:05:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:05:45,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:05:45,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 891 transitions, 18265 flow. Second operand has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:45,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:45,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:05:45,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:50,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:05:56,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:05:57,946 INFO L130 PetriNetUnfolder]: 2385/4932 cut-off events. [2022-12-13 13:05:57,947 INFO L131 PetriNetUnfolder]: For 88985/88985 co-relation queries the response was YES. [2022-12-13 13:05:57,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45302 conditions, 4932 events. 2385/4932 cut-off events. For 88985/88985 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38794 event pairs, 402 based on Foata normal form. 52/4984 useless extension candidates. Maximal degree in co-relation 45183. Up to 2185 conditions per place. [2022-12-13 13:05:57,998 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 561 selfloop transitions, 570 changer transitions 1/1132 dead transitions. [2022-12-13 13:05:57,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1132 transitions, 24939 flow [2022-12-13 13:05:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 13:05:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 13:05:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5226 transitions. [2022-12-13 13:05:58,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182472989195678 [2022-12-13 13:05:58,003 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5226 transitions. [2022-12-13 13:05:58,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5226 transitions. [2022-12-13 13:05:58,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:58,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5226 transitions. [2022-12-13 13:05:58,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 149.31428571428572) internal successors, (5226), 35 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:58,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 357.0) internal successors, (12852), 36 states have internal predecessors, (12852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:58,012 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 357.0) internal successors, (12852), 36 states have internal predecessors, (12852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:58,012 INFO L175 Difference]: Start difference. First operand has 405 places, 891 transitions, 18265 flow. Second operand 35 states and 5226 transitions. [2022-12-13 13:05:58,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1132 transitions, 24939 flow [2022-12-13 13:05:59,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1132 transitions, 23635 flow, removed 417 selfloop flow, removed 22 redundant places. [2022-12-13 13:05:59,077 INFO L231 Difference]: Finished difference. Result has 422 places, 1001 transitions, 21669 flow [2022-12-13 13:05:59,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=17116, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=21669, PETRI_PLACES=422, PETRI_TRANSITIONS=1001} [2022-12-13 13:05:59,077 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 401 predicate places. [2022-12-13 13:05:59,077 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1001 transitions, 21669 flow [2022-12-13 13:05:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:59,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:59,078 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:59,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 13:05:59,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 13:05:59,280 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:05:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash -488882859, now seen corresponding path program 18 times [2022-12-13 13:05:59,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:59,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651594298] [2022-12-13 13:05:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:59,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:59,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651594298] [2022-12-13 13:05:59,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651594298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:59,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107795294] [2022-12-13 13:05:59,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:05:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:59,531 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:59,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 13:05:59,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 13:05:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:05:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:59,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:05:59,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107795294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:59,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:59,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:05:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886164763] [2022-12-13 13:05:59,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:05:59,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:05:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:06:00,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:06:00,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1001 transitions, 21669 flow. Second operand has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:00,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:00,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:06:00,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:04,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:06:06,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:06:13,475 INFO L130 PetriNetUnfolder]: 3778/8018 cut-off events. [2022-12-13 13:06:13,475 INFO L131 PetriNetUnfolder]: For 166921/166921 co-relation queries the response was YES. [2022-12-13 13:06:13,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76485 conditions, 8018 events. 3778/8018 cut-off events. For 166921/166921 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 70654 event pairs, 74 based on Foata normal form. 70/8088 useless extension candidates. Maximal degree in co-relation 76364. Up to 1894 conditions per place. [2022-12-13 13:06:13,545 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 810 selfloop transitions, 1020 changer transitions 44/1874 dead transitions. [2022-12-13 13:06:13,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 1874 transitions, 43327 flow [2022-12-13 13:06:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 13:06:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 13:06:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7323 transitions. [2022-12-13 13:06:13,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41862459269422053 [2022-12-13 13:06:13,550 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7323 transitions. [2022-12-13 13:06:13,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7323 transitions. [2022-12-13 13:06:13,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:13,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7323 transitions. [2022-12-13 13:06:13,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 149.44897959183675) internal successors, (7323), 49 states have internal predecessors, (7323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:13,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 357.0) internal successors, (17850), 50 states have internal predecessors, (17850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:13,564 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 357.0) internal successors, (17850), 50 states have internal predecessors, (17850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:13,564 INFO L175 Difference]: Start difference. First operand has 422 places, 1001 transitions, 21669 flow. Second operand 49 states and 7323 transitions. [2022-12-13 13:06:13,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 1874 transitions, 43327 flow [2022-12-13 13:06:16,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1874 transitions, 42119 flow, removed 450 selfloop flow, removed 20 redundant places. [2022-12-13 13:06:16,085 INFO L231 Difference]: Finished difference. Result has 472 places, 1520 transitions, 36484 flow [2022-12-13 13:06:16,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=20884, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=36484, PETRI_PLACES=472, PETRI_TRANSITIONS=1520} [2022-12-13 13:06:16,086 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 451 predicate places. [2022-12-13 13:06:16,086 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1520 transitions, 36484 flow [2022-12-13 13:06:16,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:16,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:16,086 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:06:16,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 13:06:16,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:06:16,288 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:06:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1937419341, now seen corresponding path program 19 times [2022-12-13 13:06:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:06:16,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554723160] [2022-12-13 13:06:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:06:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:06:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:06:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554723160] [2022-12-13 13:06:16,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554723160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:06:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552511657] [2022-12-13 13:06:16,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:06:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:06:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:06:16,485 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:06:16,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 13:06:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:06:16,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:06:16,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:06:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:06:16,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552511657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:06:16,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:06:16,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-13 13:06:16,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189929834] [2022-12-13 13:06:16,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:06:16,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 13:06:16,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:06:16,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 13:06:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:06:16,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:06:16,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1520 transitions, 36484 flow. Second operand has 19 states, 19 states have (on average 145.78947368421052) internal successors, (2770), 19 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:16,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:16,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:06:16,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:27,157 INFO L130 PetriNetUnfolder]: 4136/8678 cut-off events. [2022-12-13 13:06:27,158 INFO L131 PetriNetUnfolder]: For 196456/196456 co-relation queries the response was YES. [2022-12-13 13:06:27,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89849 conditions, 8678 events. 4136/8678 cut-off events. For 196456/196456 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 77094 event pairs, 30 based on Foata normal form. 56/8734 useless extension candidates. Maximal degree in co-relation 89707. Up to 2651 conditions per place. [2022-12-13 13:06:27,248 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 831 selfloop transitions, 1218 changer transitions 4/2053 dead transitions. [2022-12-13 13:06:27,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2053 transitions, 51861 flow [2022-12-13 13:06:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 13:06:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-13 13:06:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8340 transitions. [2022-12-13 13:06:27,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4171668667466987 [2022-12-13 13:06:27,254 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8340 transitions. [2022-12-13 13:06:27,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8340 transitions. [2022-12-13 13:06:27,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:27,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8340 transitions. [2022-12-13 13:06:27,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 148.92857142857142) internal successors, (8340), 56 states have internal predecessors, (8340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:27,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 357.0) internal successors, (20349), 57 states have internal predecessors, (20349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:27,268 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 357.0) internal successors, (20349), 57 states have internal predecessors, (20349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:27,268 INFO L175 Difference]: Start difference. First operand has 472 places, 1520 transitions, 36484 flow. Second operand 56 states and 8340 transitions. [2022-12-13 13:06:27,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2053 transitions, 51861 flow [2022-12-13 13:06:31,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 2053 transitions, 50699 flow, removed 565 selfloop flow, removed 4 redundant places. [2022-12-13 13:06:31,406 INFO L231 Difference]: Finished difference. Result has 536 places, 1807 transitions, 46422 flow [2022-12-13 13:06:31,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=35306, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=946, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=46422, PETRI_PLACES=536, PETRI_TRANSITIONS=1807} [2022-12-13 13:06:31,407 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 515 predicate places. [2022-12-13 13:06:31,408 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1807 transitions, 46422 flow [2022-12-13 13:06:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 145.78947368421052) internal successors, (2770), 19 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:31,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:31,408 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:06:31,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 13:06:31,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 13:06:31,609 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:06:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:31,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1045244635, now seen corresponding path program 20 times [2022-12-13 13:06:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:06:31,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620849788] [2022-12-13 13:06:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:31,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:06:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:06:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:06:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620849788] [2022-12-13 13:06:31,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620849788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:06:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329225629] [2022-12-13 13:06:31,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:06:31,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:06:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:06:31,871 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:06:31,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 13:06:31,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:06:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:06:31,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:06:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:06:32,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:06:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:06:32,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329225629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:06:32,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:06:32,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:06:32,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157171940] [2022-12-13 13:06:32,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:06:32,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:06:32,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:06:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:06:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:06:32,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:06:32,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1807 transitions, 46422 flow. Second operand has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:32,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:32,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:06:32,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:43,107 INFO L130 PetriNetUnfolder]: 4440/9509 cut-off events. [2022-12-13 13:06:43,107 INFO L131 PetriNetUnfolder]: For 282513/282513 co-relation queries the response was YES. [2022-12-13 13:06:43,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104268 conditions, 9509 events. 4440/9509 cut-off events. For 282513/282513 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 87089 event pairs, 150 based on Foata normal form. 40/9549 useless extension candidates. Maximal degree in co-relation 104112. Up to 2762 conditions per place. [2022-12-13 13:06:43,209 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 1202 selfloop transitions, 959 changer transitions 9/2170 dead transitions. [2022-12-13 13:06:43,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 2170 transitions, 58452 flow [2022-12-13 13:06:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 13:06:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 13:06:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5253 transitions. [2022-12-13 13:06:43,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4204081632653061 [2022-12-13 13:06:43,213 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5253 transitions. [2022-12-13 13:06:43,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5253 transitions. [2022-12-13 13:06:43,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:43,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5253 transitions. [2022-12-13 13:06:43,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 150.0857142857143) internal successors, (5253), 35 states have internal predecessors, (5253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:43,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 357.0) internal successors, (12852), 36 states have internal predecessors, (12852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:43,222 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 357.0) internal successors, (12852), 36 states have internal predecessors, (12852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:43,222 INFO L175 Difference]: Start difference. First operand has 536 places, 1807 transitions, 46422 flow. Second operand 35 states and 5253 transitions. [2022-12-13 13:06:43,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 2170 transitions, 58452 flow [2022-12-13 13:06:49,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2170 transitions, 57309 flow, removed 364 selfloop flow, removed 16 redundant places. [2022-12-13 13:06:49,211 INFO L231 Difference]: Finished difference. Result has 565 places, 1938 transitions, 52221 flow [2022-12-13 13:06:49,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=45331, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=52221, PETRI_PLACES=565, PETRI_TRANSITIONS=1938} [2022-12-13 13:06:49,212 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2022-12-13 13:06:49,212 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1938 transitions, 52221 flow [2022-12-13 13:06:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:49,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:49,213 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:06:49,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 13:06:49,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:06:49,414 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:06:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1903634140, now seen corresponding path program 21 times [2022-12-13 13:06:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:06:49,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490143272] [2022-12-13 13:06:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:49,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:06:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:06:49,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:06:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490143272] [2022-12-13 13:06:49,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490143272] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:06:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780375400] [2022-12-13 13:06:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:06:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:06:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:06:49,590 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:06:49,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 13:06:49,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:06:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:06:49,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:06:49,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:06:49,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:06:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:06:49,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780375400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:06:49,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:06:49,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 13:06:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378572658] [2022-12-13 13:06:49,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:06:49,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:06:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:06:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:06:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:06:50,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:06:50,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1938 transitions, 52221 flow. Second operand has 18 states, 18 states have (on average 146.22222222222223) internal successors, (2632), 18 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:50,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:50,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:06:50,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:00,133 INFO L130 PetriNetUnfolder]: 4792/10213 cut-off events. [2022-12-13 13:07:00,133 INFO L131 PetriNetUnfolder]: For 360571/360571 co-relation queries the response was YES. [2022-12-13 13:07:00,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115796 conditions, 10213 events. 4792/10213 cut-off events. For 360571/360571 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 94543 event pairs, 100 based on Foata normal form. 98/10311 useless extension candidates. Maximal degree in co-relation 115634. Up to 3452 conditions per place. [2022-12-13 13:07:00,247 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 1186 selfloop transitions, 1010 changer transitions 5/2201 dead transitions. [2022-12-13 13:07:00,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 2201 transitions, 61023 flow [2022-12-13 13:07:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 13:07:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 13:07:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5372 transitions. [2022-12-13 13:07:00,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2022-12-13 13:07:00,251 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5372 transitions. [2022-12-13 13:07:00,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5372 transitions. [2022-12-13 13:07:00,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:00,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5372 transitions. [2022-12-13 13:07:00,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 149.22222222222223) internal successors, (5372), 36 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:00,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 357.0) internal successors, (13209), 37 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:00,261 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 357.0) internal successors, (13209), 37 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:00,261 INFO L175 Difference]: Start difference. First operand has 565 places, 1938 transitions, 52221 flow. Second operand 36 states and 5372 transitions. [2022-12-13 13:07:00,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 2201 transitions, 61023 flow [2022-12-13 13:07:07,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 2201 transitions, 59831 flow, removed 247 selfloop flow, removed 15 redundant places. [2022-12-13 13:07:07,515 INFO L231 Difference]: Finished difference. Result has 596 places, 2081 transitions, 56512 flow [2022-12-13 13:07:07,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=50920, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=56512, PETRI_PLACES=596, PETRI_TRANSITIONS=2081} [2022-12-13 13:07:07,516 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 575 predicate places. [2022-12-13 13:07:07,516 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 2081 transitions, 56512 flow [2022-12-13 13:07:07,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 146.22222222222223) internal successors, (2632), 18 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:07,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:07,517 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:07,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 13:07:07,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:07:07,718 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:07:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:07,719 INFO L85 PathProgramCache]: Analyzing trace with hash 629044306, now seen corresponding path program 22 times [2022-12-13 13:07:07,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:07,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918402120] [2022-12-13 13:07:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:07,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:07:07,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:07,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918402120] [2022-12-13 13:07:07,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918402120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:07:07,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935367468] [2022-12-13 13:07:07,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:07:07,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:07:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:07,892 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:07:07,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 13:07:07,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:07:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:07:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:07:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:08,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:07:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:08,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935367468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:07:08,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:07:08,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:07:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777313062] [2022-12-13 13:07:08,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:07:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:07:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:07:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:07:08,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:07:08,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 2081 transitions, 56512 flow. Second operand has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:08,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:08,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:07:08,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:18,066 INFO L130 PetriNetUnfolder]: 5049/10693 cut-off events. [2022-12-13 13:07:18,066 INFO L131 PetriNetUnfolder]: For 423251/423251 co-relation queries the response was YES. [2022-12-13 13:07:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124585 conditions, 10693 events. 5049/10693 cut-off events. For 423251/423251 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 99469 event pairs, 196 based on Foata normal form. 78/10771 useless extension candidates. Maximal degree in co-relation 124414. Up to 6473 conditions per place. [2022-12-13 13:07:18,193 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 1346 selfloop transitions, 911 changer transitions 1/2258 dead transitions. [2022-12-13 13:07:18,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2258 transitions, 64753 flow [2022-12-13 13:07:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 13:07:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 13:07:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3752 transitions. [2022-12-13 13:07:18,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4203921568627451 [2022-12-13 13:07:18,196 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3752 transitions. [2022-12-13 13:07:18,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3752 transitions. [2022-12-13 13:07:18,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:18,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3752 transitions. [2022-12-13 13:07:18,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 150.08) internal successors, (3752), 25 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:18,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 357.0) internal successors, (9282), 26 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:18,202 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 357.0) internal successors, (9282), 26 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:18,202 INFO L175 Difference]: Start difference. First operand has 596 places, 2081 transitions, 56512 flow. Second operand 25 states and 3752 transitions. [2022-12-13 13:07:18,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2258 transitions, 64753 flow [2022-12-13 13:07:26,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 2258 transitions, 62360 flow, removed 793 selfloop flow, removed 9 redundant places. [2022-12-13 13:07:26,339 INFO L231 Difference]: Finished difference. Result has 621 places, 2149 transitions, 59005 flow [2022-12-13 13:07:26,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=54944, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=853, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=59005, PETRI_PLACES=621, PETRI_TRANSITIONS=2149} [2022-12-13 13:07:26,340 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 600 predicate places. [2022-12-13 13:07:26,340 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 2149 transitions, 59005 flow [2022-12-13 13:07:26,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:26,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:26,341 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:26,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 13:07:26,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 13:07:26,542 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:07:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash 596227676, now seen corresponding path program 23 times [2022-12-13 13:07:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:26,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791779826] [2022-12-13 13:07:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:26,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:26,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791779826] [2022-12-13 13:07:26,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791779826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:07:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505798822] [2022-12-13 13:07:26,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:07:26,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:07:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:26,741 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:07:26,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 13:07:26,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 13:07:26,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:07:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:07:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:26,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:07:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:27,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505798822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:07:27,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:07:27,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-13 13:07:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703005243] [2022-12-13 13:07:27,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:07:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:07:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:07:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:07:27,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:07:27,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 2149 transitions, 59005 flow. Second operand has 17 states, 17 states have (on average 146.1764705882353) internal successors, (2485), 17 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:27,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:27,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:07:27,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:39,112 INFO L130 PetriNetUnfolder]: 5379/11535 cut-off events. [2022-12-13 13:07:39,112 INFO L131 PetriNetUnfolder]: For 463574/463574 co-relation queries the response was YES. [2022-12-13 13:07:39,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133657 conditions, 11535 events. 5379/11535 cut-off events. For 463574/463574 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 109206 event pairs, 144 based on Foata normal form. 84/11619 useless extension candidates. Maximal degree in co-relation 133476. Up to 4889 conditions per place. [2022-12-13 13:07:39,257 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 1474 selfloop transitions, 919 changer transitions 2/2395 dead transitions. [2022-12-13 13:07:39,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 2395 transitions, 68866 flow [2022-12-13 13:07:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 13:07:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 13:07:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4201 transitions. [2022-12-13 13:07:39,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42026810724289715 [2022-12-13 13:07:39,260 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4201 transitions. [2022-12-13 13:07:39,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4201 transitions. [2022-12-13 13:07:39,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:39,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4201 transitions. [2022-12-13 13:07:39,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 150.03571428571428) internal successors, (4201), 28 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:39,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 357.0) internal successors, (10353), 29 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:39,267 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 357.0) internal successors, (10353), 29 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:39,267 INFO L175 Difference]: Start difference. First operand has 621 places, 2149 transitions, 59005 flow. Second operand 28 states and 4201 transitions. [2022-12-13 13:07:39,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 2395 transitions, 68866 flow [2022-12-13 13:07:48,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 2395 transitions, 67087 flow, removed 208 selfloop flow, removed 12 redundant places. [2022-12-13 13:07:48,916 INFO L231 Difference]: Finished difference. Result has 642 places, 2270 transitions, 63503 flow [2022-12-13 13:07:48,917 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=57064, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=63503, PETRI_PLACES=642, PETRI_TRANSITIONS=2270} [2022-12-13 13:07:48,918 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 621 predicate places. [2022-12-13 13:07:48,918 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 2270 transitions, 63503 flow [2022-12-13 13:07:48,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 146.1764705882353) internal successors, (2485), 17 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:48,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:48,918 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:48,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 13:07:49,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 13:07:49,120 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:07:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash -337140768, now seen corresponding path program 24 times [2022-12-13 13:07:49,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:49,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841180124] [2022-12-13 13:07:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:49,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841180124] [2022-12-13 13:07:49,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841180124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:07:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603205794] [2022-12-13 13:07:49,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:07:49,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:07:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:49,300 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:07:49,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 13:07:49,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 13:07:49,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:07:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:07:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:49,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:07:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:07:49,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603205794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:07:49,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:07:49,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 13:07:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799016678] [2022-12-13 13:07:49,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:07:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:07:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:07:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:07:49,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:07:49,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2270 transitions, 63503 flow. Second operand has 18 states, 18 states have (on average 146.22222222222223) internal successors, (2632), 18 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:49,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:49,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:07:49,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:01,986 INFO L130 PetriNetUnfolder]: 5425/11611 cut-off events. [2022-12-13 13:08:01,986 INFO L131 PetriNetUnfolder]: For 508829/508829 co-relation queries the response was YES. [2022-12-13 13:08:02,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139218 conditions, 11611 events. 5425/11611 cut-off events. For 508829/508829 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 110015 event pairs, 1336 based on Foata normal form. 20/11631 useless extension candidates. Maximal degree in co-relation 139031. Up to 6825 conditions per place. [2022-12-13 13:08:02,182 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 1841 selfloop transitions, 546 changer transitions 0/2387 dead transitions. [2022-12-13 13:08:02,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 2387 transitions, 70439 flow [2022-12-13 13:08:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 13:08:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 13:08:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3589 transitions. [2022-12-13 13:08:02,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4188842203548086 [2022-12-13 13:08:02,187 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3589 transitions. [2022-12-13 13:08:02,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3589 transitions. [2022-12-13 13:08:02,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:02,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3589 transitions. [2022-12-13 13:08:02,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 149.54166666666666) internal successors, (3589), 24 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:02,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 357.0) internal successors, (8925), 25 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:02,197 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 357.0) internal successors, (8925), 25 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:02,197 INFO L175 Difference]: Start difference. First operand has 642 places, 2270 transitions, 63503 flow. Second operand 24 states and 3589 transitions. [2022-12-13 13:08:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 2387 transitions, 70439 flow [2022-12-13 13:08:12,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 2387 transitions, 68981 flow, removed 648 selfloop flow, removed 12 redundant places. [2022-12-13 13:08:12,407 INFO L231 Difference]: Finished difference. Result has 659 places, 2309 transitions, 64827 flow [2022-12-13 13:08:12,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=61956, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=64827, PETRI_PLACES=659, PETRI_TRANSITIONS=2309} [2022-12-13 13:08:12,409 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 638 predicate places. [2022-12-13 13:08:12,409 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 2309 transitions, 64827 flow [2022-12-13 13:08:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 146.22222222222223) internal successors, (2632), 18 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:12,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:12,409 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:12,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 13:08:12,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:08:12,611 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:08:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1768586092, now seen corresponding path program 25 times [2022-12-13 13:08:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:12,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425238287] [2022-12-13 13:08:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:08:12,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:12,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425238287] [2022-12-13 13:08:12,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425238287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:08:12,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610051223] [2022-12-13 13:08:12,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:08:12,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:08:12,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:08:12,796 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:08:12,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 13:08:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:12,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:08:12,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:12,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:08:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:13,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610051223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:08:13,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:08:13,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:08:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385439876] [2022-12-13 13:08:13,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:08:13,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:08:13,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:08:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:08:13,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:08:13,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 2309 transitions, 64827 flow. Second operand has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:13,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:13,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:08:13,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:24,454 INFO L130 PetriNetUnfolder]: 5597/11907 cut-off events. [2022-12-13 13:08:24,455 INFO L131 PetriNetUnfolder]: For 514804/514804 co-relation queries the response was YES. [2022-12-13 13:08:24,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141544 conditions, 11907 events. 5597/11907 cut-off events. For 514804/514804 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 112723 event pairs, 2008 based on Foata normal form. 58/11965 useless extension candidates. Maximal degree in co-relation 141353. Up to 10626 conditions per place. [2022-12-13 13:08:24,607 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2144 selfloop transitions, 339 changer transitions 0/2483 dead transitions. [2022-12-13 13:08:24,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 2483 transitions, 72871 flow [2022-12-13 13:08:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 13:08:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 13:08:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3899 transitions. [2022-12-13 13:08:24,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4200603318250377 [2022-12-13 13:08:24,610 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3899 transitions. [2022-12-13 13:08:24,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3899 transitions. [2022-12-13 13:08:24,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:24,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3899 transitions. [2022-12-13 13:08:24,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 149.96153846153845) internal successors, (3899), 26 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:24,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 357.0) internal successors, (9639), 27 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:24,616 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 357.0) internal successors, (9639), 27 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:24,616 INFO L175 Difference]: Start difference. First operand has 659 places, 2309 transitions, 64827 flow. Second operand 26 states and 3899 transitions. [2022-12-13 13:08:24,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 2483 transitions, 72871 flow [2022-12-13 13:08:34,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2483 transitions, 71876 flow, removed 235 selfloop flow, removed 11 redundant places. [2022-12-13 13:08:34,919 INFO L231 Difference]: Finished difference. Result has 685 places, 2359 transitions, 66247 flow [2022-12-13 13:08:34,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=63604, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=66247, PETRI_PLACES=685, PETRI_TRANSITIONS=2359} [2022-12-13 13:08:34,921 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 664 predicate places. [2022-12-13 13:08:34,921 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 2359 transitions, 66247 flow [2022-12-13 13:08:34,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:34,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:34,921 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:34,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 13:08:35,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:08:35,123 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:08:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash -917619806, now seen corresponding path program 26 times [2022-12-13 13:08:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:35,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431734244] [2022-12-13 13:08:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:35,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:08:35,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431734244] [2022-12-13 13:08:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431734244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:08:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139600208] [2022-12-13 13:08:35,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:08:35,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:08:35,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:08:35,249 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:08:35,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 13:08:35,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:08:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:08:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:08:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:35,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:08:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:35,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139600208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:08:35,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:08:35,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:08:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241222112] [2022-12-13 13:08:35,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:08:35,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:08:35,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:08:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:08:35,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:08:35,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 2359 transitions, 66247 flow. Second operand has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:35,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:35,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:08:35,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:47,669 INFO L130 PetriNetUnfolder]: 5880/12432 cut-off events. [2022-12-13 13:08:47,669 INFO L131 PetriNetUnfolder]: For 538577/538577 co-relation queries the response was YES. [2022-12-13 13:08:47,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148117 conditions, 12432 events. 5880/12432 cut-off events. For 538577/538577 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 117680 event pairs, 1326 based on Foata normal form. 22/12454 useless extension candidates. Maximal degree in co-relation 147914. Up to 5824 conditions per place. [2022-12-13 13:08:47,851 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 1903 selfloop transitions, 650 changer transitions 2/2555 dead transitions. [2022-12-13 13:08:47,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 2555 transitions, 75523 flow [2022-12-13 13:08:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:08:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 13:08:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2834 transitions. [2022-12-13 13:08:47,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41780922895473976 [2022-12-13 13:08:47,853 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2834 transitions. [2022-12-13 13:08:47,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2834 transitions. [2022-12-13 13:08:47,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:47,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2834 transitions. [2022-12-13 13:08:47,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 149.1578947368421) internal successors, (2834), 19 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:47,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 357.0) internal successors, (7140), 20 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:47,858 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 357.0) internal successors, (7140), 20 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:47,858 INFO L175 Difference]: Start difference. First operand has 685 places, 2359 transitions, 66247 flow. Second operand 19 states and 2834 transitions. [2022-12-13 13:08:47,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 2555 transitions, 75523 flow [2022-12-13 13:08:58,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 2555 transitions, 75018 flow, removed 204 selfloop flow, removed 5 redundant places. [2022-12-13 13:08:58,818 INFO L231 Difference]: Finished difference. Result has 705 places, 2473 transitions, 71110 flow [2022-12-13 13:08:58,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=65631, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=71110, PETRI_PLACES=705, PETRI_TRANSITIONS=2473} [2022-12-13 13:08:58,820 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 684 predicate places. [2022-12-13 13:08:58,820 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 2473 transitions, 71110 flow [2022-12-13 13:08:58,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:58,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:58,820 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:58,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 13:08:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 13:08:59,021 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:08:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1192700892, now seen corresponding path program 27 times [2022-12-13 13:08:59,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:59,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114425354] [2022-12-13 13:08:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:08:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114425354] [2022-12-13 13:08:59,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114425354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:08:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702365695] [2022-12-13 13:08:59,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:08:59,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:08:59,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:08:59,179 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:08:59,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 13:08:59,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 13:08:59,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:08:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:08:59,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:59,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:08:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:59,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702365695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:08:59,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:08:59,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:08:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264731946] [2022-12-13 13:08:59,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:08:59,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:08:59,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:08:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:08:59,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:08:59,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 2473 transitions, 71110 flow. Second operand has 18 states, 18 states have (on average 145.88888888888889) internal successors, (2626), 18 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:59,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:59,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:08:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:09:13,269 INFO L130 PetriNetUnfolder]: 6281/13396 cut-off events. [2022-12-13 13:09:13,270 INFO L131 PetriNetUnfolder]: For 642536/642536 co-relation queries the response was YES. [2022-12-13 13:09:13,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163100 conditions, 13396 events. 6281/13396 cut-off events. For 642536/642536 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 129459 event pairs, 1334 based on Foata normal form. 21/13417 useless extension candidates. Maximal degree in co-relation 162889. Up to 5740 conditions per place. [2022-12-13 13:09:13,480 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 1850 selfloop transitions, 847 changer transitions 13/2710 dead transitions. [2022-12-13 13:09:13,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2710 transitions, 81575 flow [2022-12-13 13:09:13,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 13:09:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 13:09:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3139 transitions. [2022-12-13 13:09:13,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41870081365879686 [2022-12-13 13:09:13,483 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3139 transitions. [2022-12-13 13:09:13,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3139 transitions. [2022-12-13 13:09:13,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:09:13,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3139 transitions. [2022-12-13 13:09:13,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 149.47619047619048) internal successors, (3139), 21 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:13,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 357.0) internal successors, (7854), 22 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:13,488 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 357.0) internal successors, (7854), 22 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:13,488 INFO L175 Difference]: Start difference. First operand has 705 places, 2473 transitions, 71110 flow. Second operand 21 states and 3139 transitions. [2022-12-13 13:09:13,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2710 transitions, 81575 flow [2022-12-13 13:09:26,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 2710 transitions, 81143 flow, removed 160 selfloop flow, removed 6 redundant places. [2022-12-13 13:09:26,370 INFO L231 Difference]: Finished difference. Result has 724 places, 2596 transitions, 76696 flow [2022-12-13 13:09:26,371 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=70614, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=76696, PETRI_PLACES=724, PETRI_TRANSITIONS=2596} [2022-12-13 13:09:26,371 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 703 predicate places. [2022-12-13 13:09:26,371 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2596 transitions, 76696 flow [2022-12-13 13:09:26,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.88888888888889) internal successors, (2626), 18 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:26,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:09:26,371 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:26,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 13:09:26,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 13:09:26,573 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:09:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1024329810, now seen corresponding path program 28 times [2022-12-13 13:09:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:26,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769615797] [2022-12-13 13:09:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:09:26,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:26,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769615797] [2022-12-13 13:09:26,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769615797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:09:26,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637679188] [2022-12-13 13:09:26,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:09:26,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:09:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:09:26,715 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:09:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 13:09:26,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:09:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:09:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:09:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:09:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:26,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:09:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:27,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637679188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:09:27,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:09:27,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:09:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080550186] [2022-12-13 13:09:27,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:09:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:09:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:09:27,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:09:27,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:09:27,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2596 transitions, 76696 flow. Second operand has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:27,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:09:27,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:09:27,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:09:41,072 INFO L130 PetriNetUnfolder]: 6323/13478 cut-off events. [2022-12-13 13:09:41,073 INFO L131 PetriNetUnfolder]: For 692155/692155 co-relation queries the response was YES. [2022-12-13 13:09:41,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169750 conditions, 13478 events. 6323/13478 cut-off events. For 692155/692155 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 130221 event pairs, 1544 based on Foata normal form. 6/13484 useless extension candidates. Maximal degree in co-relation 169532. Up to 6231 conditions per place. [2022-12-13 13:09:41,265 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2192 selfloop transitions, 493 changer transitions 6/2691 dead transitions. [2022-12-13 13:09:41,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2691 transitions, 83999 flow [2022-12-13 13:09:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 13:09:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 13:09:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2827 transitions. [2022-12-13 13:09:41,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4167772372106737 [2022-12-13 13:09:41,268 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2827 transitions. [2022-12-13 13:09:41,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2827 transitions. [2022-12-13 13:09:41,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:09:41,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2827 transitions. [2022-12-13 13:09:41,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 148.78947368421052) internal successors, (2827), 19 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:41,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 357.0) internal successors, (7140), 20 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:41,273 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 357.0) internal successors, (7140), 20 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:41,273 INFO L175 Difference]: Start difference. First operand has 724 places, 2596 transitions, 76696 flow. Second operand 19 states and 2827 transitions. [2022-12-13 13:09:41,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2691 transitions, 83999 flow [2022-12-13 13:09:54,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 2691 transitions, 83761 flow, removed 57 selfloop flow, removed 8 redundant places. [2022-12-13 13:09:54,645 INFO L231 Difference]: Finished difference. Result has 738 places, 2605 transitions, 78317 flow [2022-12-13 13:09:54,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=76341, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=78317, PETRI_PLACES=738, PETRI_TRANSITIONS=2605} [2022-12-13 13:09:54,647 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 717 predicate places. [2022-12-13 13:09:54,647 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2605 transitions, 78317 flow [2022-12-13 13:09:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:54,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:09:54,647 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:54,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 13:09:54,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 13:09:54,849 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:09:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1729444568, now seen corresponding path program 29 times [2022-12-13 13:09:54,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:54,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070260843] [2022-12-13 13:09:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:54,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:09:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:54,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070260843] [2022-12-13 13:09:54,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070260843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:09:54,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092867490] [2022-12-13 13:09:54,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:09:54,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:09:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:09:54,973 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:09:54,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 13:09:55,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 13:09:55,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:09:55,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:09:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:09:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:09:55,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:09:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:09:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092867490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:09:55,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:09:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-13 13:09:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826926012] [2022-12-13 13:09:55,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:09:55,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:09:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:09:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:09:55,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:09:55,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2605 transitions, 78317 flow. Second operand has 16 states, 16 states have (on average 146.0625) internal successors, (2337), 16 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:55,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:09:55,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:09:55,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:09,886 INFO L130 PetriNetUnfolder]: 6473/13731 cut-off events. [2022-12-13 13:10:09,886 INFO L131 PetriNetUnfolder]: For 764968/764968 co-relation queries the response was YES. [2022-12-13 13:10:10,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177827 conditions, 13731 events. 6473/13731 cut-off events. For 764968/764968 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 132730 event pairs, 2376 based on Foata normal form. 70/13801 useless extension candidates. Maximal degree in co-relation 177604. Up to 12575 conditions per place. [2022-12-13 13:10:10,090 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2447 selfloop transitions, 330 changer transitions 4/2781 dead transitions. [2022-12-13 13:10:10,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 2781 transitions, 88226 flow [2022-12-13 13:10:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 13:10:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 13:10:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4341 transitions. [2022-12-13 13:10:10,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41929875398435235 [2022-12-13 13:10:10,093 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4341 transitions. [2022-12-13 13:10:10,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4341 transitions. [2022-12-13 13:10:10,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:10,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4341 transitions. [2022-12-13 13:10:10,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 149.68965517241378) internal successors, (4341), 29 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:10,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 357.0) internal successors, (10710), 30 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:10,100 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 357.0) internal successors, (10710), 30 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:10,101 INFO L175 Difference]: Start difference. First operand has 738 places, 2605 transitions, 78317 flow. Second operand 29 states and 4341 transitions. [2022-12-13 13:10:10,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 2781 transitions, 88226 flow [2022-12-13 13:10:24,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 2781 transitions, 87847 flow, removed 46 selfloop flow, removed 11 redundant places. [2022-12-13 13:10:24,206 INFO L231 Difference]: Finished difference. Result has 769 places, 2675 transitions, 81542 flow [2022-12-13 13:10:24,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=77784, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=81542, PETRI_PLACES=769, PETRI_TRANSITIONS=2675} [2022-12-13 13:10:24,207 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 748 predicate places. [2022-12-13 13:10:24,208 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 2675 transitions, 81542 flow [2022-12-13 13:10:24,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 146.0625) internal successors, (2337), 16 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:24,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:24,208 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:10:24,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 13:10:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 13:10:24,410 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:10:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash -659398686, now seen corresponding path program 30 times [2022-12-13 13:10:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:24,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991048994] [2022-12-13 13:10:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991048994] [2022-12-13 13:10:24,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991048994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:10:24,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490431898] [2022-12-13 13:10:24,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:10:24,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:10:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:10:24,596 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:10:24,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 13:10:24,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 13:10:24,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:10:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:10:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:10:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:24,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:10:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:24,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490431898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:10:24,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:10:24,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-13 13:10:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856315838] [2022-12-13 13:10:24,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:10:24,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 13:10:24,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 13:10:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:10:25,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:10:25,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 2675 transitions, 81542 flow. Second operand has 19 states, 19 states have (on average 145.94736842105263) internal successors, (2773), 19 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:25,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:25,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:10:25,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:10:40,854 INFO L130 PetriNetUnfolder]: 6586/13928 cut-off events. [2022-12-13 13:10:40,854 INFO L131 PetriNetUnfolder]: For 820480/820480 co-relation queries the response was YES. [2022-12-13 13:10:41,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183220 conditions, 13928 events. 6586/13928 cut-off events. For 820480/820480 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 134478 event pairs, 1558 based on Foata normal form. 30/13958 useless extension candidates. Maximal degree in co-relation 182982. Up to 7907 conditions per place. [2022-12-13 13:10:41,080 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 1972 selfloop transitions, 865 changer transitions 4/2841 dead transitions. [2022-12-13 13:10:41,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 2841 transitions, 91887 flow [2022-12-13 13:10:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 13:10:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 13:10:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4343 transitions. [2022-12-13 13:10:41,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41949193470491647 [2022-12-13 13:10:41,084 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4343 transitions. [2022-12-13 13:10:41,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4343 transitions. [2022-12-13 13:10:41,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:10:41,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4343 transitions. [2022-12-13 13:10:41,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 149.75862068965517) internal successors, (4343), 29 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:41,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 357.0) internal successors, (10710), 30 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:41,091 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 357.0) internal successors, (10710), 30 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:41,091 INFO L175 Difference]: Start difference. First operand has 769 places, 2675 transitions, 81542 flow. Second operand 29 states and 4343 transitions. [2022-12-13 13:10:41,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 2841 transitions, 91887 flow [2022-12-13 13:10:56,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 2841 transitions, 90780 flow, removed 372 selfloop flow, removed 8 redundant places. [2022-12-13 13:10:56,705 INFO L231 Difference]: Finished difference. Result has 796 places, 2749 transitions, 86305 flow [2022-12-13 13:10:56,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=80218, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1858, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=86305, PETRI_PLACES=796, PETRI_TRANSITIONS=2749} [2022-12-13 13:10:56,706 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 775 predicate places. [2022-12-13 13:10:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 2749 transitions, 86305 flow [2022-12-13 13:10:56,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 145.94736842105263) internal successors, (2773), 19 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:56,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:56,707 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:10:56,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 13:10:56,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 13:10:56,909 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:10:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1164549882, now seen corresponding path program 31 times [2022-12-13 13:10:56,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:56,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246181104] [2022-12-13 13:10:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:10:57,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:57,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246181104] [2022-12-13 13:10:57,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246181104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:10:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853351789] [2022-12-13 13:10:57,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:10:57,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:10:57,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:10:57,056 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:10:57,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 13:10:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:10:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:10:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:57,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:10:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853351789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:10:57,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:10:57,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:10:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116391647] [2022-12-13 13:10:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:10:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:10:57,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:10:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:10:57,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:10:57,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 2749 transitions, 86305 flow. Second operand has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:10:57,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:57,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:10:57,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:11:13,379 INFO L130 PetriNetUnfolder]: 6604/13977 cut-off events. [2022-12-13 13:11:13,379 INFO L131 PetriNetUnfolder]: For 860104/860104 co-relation queries the response was YES. [2022-12-13 13:11:13,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188010 conditions, 13977 events. 6604/13977 cut-off events. For 860104/860104 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 134951 event pairs, 1659 based on Foata normal form. 19/13996 useless extension candidates. Maximal degree in co-relation 187764. Up to 6630 conditions per place. [2022-12-13 13:11:13,717 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2288 selfloop transitions, 536 changer transitions 12/2836 dead transitions. [2022-12-13 13:11:13,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 2836 transitions, 93950 flow [2022-12-13 13:11:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 13:11:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 13:11:13,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3268 transitions. [2022-12-13 13:11:13,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41609371021135727 [2022-12-13 13:11:13,720 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3268 transitions. [2022-12-13 13:11:13,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3268 transitions. [2022-12-13 13:11:13,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:11:13,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3268 transitions. [2022-12-13 13:11:13,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 148.54545454545453) internal successors, (3268), 22 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:13,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 357.0) internal successors, (8211), 23 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:13,725 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 357.0) internal successors, (8211), 23 states have internal predecessors, (8211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:13,725 INFO L175 Difference]: Start difference. First operand has 796 places, 2749 transitions, 86305 flow. Second operand 22 states and 3268 transitions. [2022-12-13 13:11:13,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 2836 transitions, 93950 flow [2022-12-13 13:11:31,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 2836 transitions, 91767 flow, removed 800 selfloop flow, removed 11 redundant places. [2022-12-13 13:11:31,367 INFO L231 Difference]: Finished difference. Result has 811 places, 2748 transitions, 85958 flow [2022-12-13 13:11:31,368 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=84009, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=85958, PETRI_PLACES=811, PETRI_TRANSITIONS=2748} [2022-12-13 13:11:31,368 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 790 predicate places. [2022-12-13 13:11:31,368 INFO L495 AbstractCegarLoop]: Abstraction has has 811 places, 2748 transitions, 85958 flow [2022-12-13 13:11:31,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:31,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:11:31,369 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:11:31,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 13:11:31,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:11:31,570 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:11:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:11:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1114088646, now seen corresponding path program 32 times [2022-12-13 13:11:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:11:31,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555753705] [2022-12-13 13:11:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:11:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:11:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:11:31,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:11:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555753705] [2022-12-13 13:11:31,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555753705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:11:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329029050] [2022-12-13 13:11:31,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:11:31,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:11:31,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:11:31,735 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:11:31,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 13:11:31,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:11:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:11:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:11:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:11:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:11:31,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:11:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:11:32,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329029050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:11:32,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:11:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 13:11:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887661591] [2022-12-13 13:11:32,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:11:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:11:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:11:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:11:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:11:32,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:11:32,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 2748 transitions, 85958 flow. Second operand has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:32,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:11:32,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:11:32,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:11:47,660 INFO L130 PetriNetUnfolder]: 6701/14159 cut-off events. [2022-12-13 13:11:47,660 INFO L131 PetriNetUnfolder]: For 896658/896658 co-relation queries the response was YES. [2022-12-13 13:11:47,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191053 conditions, 14159 events. 6701/14159 cut-off events. For 896658/896658 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 136932 event pairs, 2081 based on Foata normal form. 60/14219 useless extension candidates. Maximal degree in co-relation 190802. Up to 10371 conditions per place. [2022-12-13 13:11:47,922 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 2144 selfloop transitions, 705 changer transitions 4/2853 dead transitions. [2022-12-13 13:11:47,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 2853 transitions, 94774 flow [2022-12-13 13:11:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:11:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 13:11:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2395 transitions. [2022-12-13 13:11:47,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41929271708683474 [2022-12-13 13:11:47,925 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2395 transitions. [2022-12-13 13:11:47,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2395 transitions. [2022-12-13 13:11:47,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:11:47,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2395 transitions. [2022-12-13 13:11:47,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 149.6875) internal successors, (2395), 16 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:47,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:47,929 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:47,929 INFO L175 Difference]: Start difference. First operand has 811 places, 2748 transitions, 85958 flow. Second operand 16 states and 2395 transitions. [2022-12-13 13:11:47,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 2853 transitions, 94774 flow [2022-12-13 13:12:04,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 2853 transitions, 93695 flow, removed 296 selfloop flow, removed 18 redundant places. [2022-12-13 13:12:04,372 INFO L231 Difference]: Finished difference. Result has 805 places, 2764 transitions, 88124 flow [2022-12-13 13:12:04,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=84524, PETRI_DIFFERENCE_MINUEND_PLACES=787, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=678, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=88124, PETRI_PLACES=805, PETRI_TRANSITIONS=2764} [2022-12-13 13:12:04,374 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 784 predicate places. [2022-12-13 13:12:04,374 INFO L495 AbstractCegarLoop]: Abstraction has has 805 places, 2764 transitions, 88124 flow [2022-12-13 13:12:04,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.77777777777777) internal successors, (2624), 18 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:04,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:12:04,375 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:12:04,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 13:12:04,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:12:04,576 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:12:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:12:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1567311916, now seen corresponding path program 33 times [2022-12-13 13:12:04,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:12:04,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496654297] [2022-12-13 13:12:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:12:04,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:12:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 13:12:04,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:12:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496654297] [2022-12-13 13:12:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496654297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:12:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282482161] [2022-12-13 13:12:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:12:04,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:12:04,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:12:04,697 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:12:04,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 13:12:04,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 13:12:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:12:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:12:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:12:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:12:04,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:12:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:12:04,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282482161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:12:04,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:12:04,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-13 13:12:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673656978] [2022-12-13 13:12:04,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:12:04,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:12:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:12:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:12:04,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:12:05,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:12:05,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 2764 transitions, 88124 flow. Second operand has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:05,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:12:05,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:12:05,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:12:21,015 INFO L130 PetriNetUnfolder]: 6734/14244 cut-off events. [2022-12-13 13:12:21,016 INFO L131 PetriNetUnfolder]: For 917910/917910 co-relation queries the response was YES. [2022-12-13 13:12:21,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194302 conditions, 14244 events. 6734/14244 cut-off events. For 917910/917910 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 138021 event pairs, 2310 based on Foata normal form. 66/14310 useless extension candidates. Maximal degree in co-relation 194060. Up to 11705 conditions per place. [2022-12-13 13:12:21,250 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2308 selfloop transitions, 534 changer transitions 0/2842 dead transitions. [2022-12-13 13:12:21,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2842 transitions, 95947 flow [2022-12-13 13:12:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 13:12:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 13:12:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2539 transitions. [2022-12-13 13:12:21,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4183555775251277 [2022-12-13 13:12:21,252 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2539 transitions. [2022-12-13 13:12:21,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2539 transitions. [2022-12-13 13:12:21,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:12:21,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2539 transitions. [2022-12-13 13:12:21,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 149.35294117647058) internal successors, (2539), 17 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:21,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 357.0) internal successors, (6426), 18 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:21,257 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 357.0) internal successors, (6426), 18 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:21,257 INFO L175 Difference]: Start difference. First operand has 805 places, 2764 transitions, 88124 flow. Second operand 17 states and 2539 transitions. [2022-12-13 13:12:21,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2842 transitions, 95947 flow [2022-12-13 13:12:38,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 2842 transitions, 95213 flow, removed 198 selfloop flow, removed 15 redundant places. [2022-12-13 13:12:38,072 INFO L231 Difference]: Finished difference. Result has 809 places, 2780 transitions, 89928 flow [2022-12-13 13:12:38,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=87108, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=89928, PETRI_PLACES=809, PETRI_TRANSITIONS=2780} [2022-12-13 13:12:38,073 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2022-12-13 13:12:38,074 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 2780 transitions, 89928 flow [2022-12-13 13:12:38,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:38,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:12:38,074 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:12:38,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 13:12:38,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:12:38,276 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:12:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:12:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 314620766, now seen corresponding path program 34 times [2022-12-13 13:12:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:12:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625116561] [2022-12-13 13:12:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:12:38,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:12:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:12:38,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:12:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625116561] [2022-12-13 13:12:38,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625116561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:12:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321699389] [2022-12-13 13:12:38,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 13:12:38,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:12:38,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:12:38,449 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:12:38,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 13:12:38,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 13:12:38,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:12:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:12:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:12:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:12:38,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:12:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:12:38,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321699389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:12:38,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:12:38,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-13 13:12:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067264265] [2022-12-13 13:12:38,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:12:38,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:12:38,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:12:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:12:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:12:38,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:12:38,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 2780 transitions, 89928 flow. Second operand has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:38,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:12:38,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:12:38,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:12:55,941 INFO L130 PetriNetUnfolder]: 7217/15001 cut-off events. [2022-12-13 13:12:55,941 INFO L131 PetriNetUnfolder]: For 1001649/1001649 co-relation queries the response was YES. [2022-12-13 13:12:56,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208695 conditions, 15001 events. 7217/15001 cut-off events. For 1001649/1001649 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 144327 event pairs, 2312 based on Foata normal form. 124/15125 useless extension candidates. Maximal degree in co-relation 208453. Up to 12547 conditions per place. [2022-12-13 13:12:56,208 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2302 selfloop transitions, 851 changer transitions 0/3153 dead transitions. [2022-12-13 13:12:56,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 3153 transitions, 107129 flow [2022-12-13 13:12:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 13:12:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 13:12:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5341 transitions. [2022-12-13 13:12:56,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4155773420479303 [2022-12-13 13:12:56,212 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5341 transitions. [2022-12-13 13:12:56,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5341 transitions. [2022-12-13 13:12:56,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:12:56,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5341 transitions. [2022-12-13 13:12:56,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 148.36111111111111) internal successors, (5341), 36 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:56,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 357.0) internal successors, (13209), 37 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:56,222 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 357.0) internal successors, (13209), 37 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:12:56,222 INFO L175 Difference]: Start difference. First operand has 809 places, 2780 transitions, 89928 flow. Second operand 36 states and 5341 transitions. [2022-12-13 13:12:56,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 3153 transitions, 107129 flow [2022-12-13 13:13:15,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 3153 transitions, 106248 flow, removed 259 selfloop flow, removed 13 redundant places. [2022-12-13 13:13:15,326 INFO L231 Difference]: Finished difference. Result has 844 places, 3048 transitions, 101417 flow [2022-12-13 13:13:15,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=88938, PETRI_DIFFERENCE_MINUEND_PLACES=796, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=101417, PETRI_PLACES=844, PETRI_TRANSITIONS=3048} [2022-12-13 13:13:15,328 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 823 predicate places. [2022-12-13 13:13:15,328 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 3048 transitions, 101417 flow [2022-12-13 13:13:15,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.94117647058823) internal successors, (2481), 17 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:15,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:15,328 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:15,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 13:13:15,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:15,529 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:13:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1164344050, now seen corresponding path program 35 times [2022-12-13 13:13:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127025669] [2022-12-13 13:13:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:15,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:15,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127025669] [2022-12-13 13:13:15,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127025669] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:13:15,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539274436] [2022-12-13 13:13:15,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 13:13:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:15,680 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:13:15,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 13:13:15,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 13:13:15,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:13:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:13:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:15,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:15,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539274436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:15,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:13:15,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 13:13:15,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454737383] [2022-12-13 13:13:15,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:13:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:13:15,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:13:16,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:13:16,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 3048 transitions, 101417 flow. Second operand has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:16,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:16,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:13:16,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:13:35,294 INFO L130 PetriNetUnfolder]: 7400/15292 cut-off events. [2022-12-13 13:13:35,294 INFO L131 PetriNetUnfolder]: For 1095196/1095196 co-relation queries the response was YES. [2022-12-13 13:13:35,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217542 conditions, 15292 events. 7400/15292 cut-off events. For 1095196/1095196 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 146584 event pairs, 250 based on Foata normal form. 76/15368 useless extension candidates. Maximal degree in co-relation 217288. Up to 7555 conditions per place. [2022-12-13 13:13:35,571 INFO L137 encePairwiseOnDemand]: 351/357 looper letters, 2180 selfloop transitions, 1157 changer transitions 0/3337 dead transitions. [2022-12-13 13:13:35,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 3337 transitions, 116266 flow [2022-12-13 13:13:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 13:13:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 13:13:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4760 transitions. [2022-12-13 13:13:35,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-13 13:13:35,575 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4760 transitions. [2022-12-13 13:13:35,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4760 transitions. [2022-12-13 13:13:35,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:13:35,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4760 transitions. [2022-12-13 13:13:35,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 148.75) internal successors, (4760), 32 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:35,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 357.0) internal successors, (11781), 33 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:35,582 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 357.0) internal successors, (11781), 33 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:35,583 INFO L175 Difference]: Start difference. First operand has 844 places, 3048 transitions, 101417 flow. Second operand 32 states and 4760 transitions. [2022-12-13 13:13:35,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 3337 transitions, 116266 flow [2022-12-13 13:13:57,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 863 places, 3337 transitions, 115664 flow, removed 206 selfloop flow, removed 12 redundant places. [2022-12-13 13:13:57,237 INFO L231 Difference]: Finished difference. Result has 873 places, 3163 transitions, 107588 flow [2022-12-13 13:13:57,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=100729, PETRI_DIFFERENCE_MINUEND_PLACES=832, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=107588, PETRI_PLACES=873, PETRI_TRANSITIONS=3163} [2022-12-13 13:13:57,238 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 852 predicate places. [2022-12-13 13:13:57,239 INFO L495 AbstractCegarLoop]: Abstraction has has 873 places, 3163 transitions, 107588 flow [2022-12-13 13:13:57,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:13:57,239 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:57,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-13 13:13:57,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 13:13:57,441 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:13:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash 707887528, now seen corresponding path program 36 times [2022-12-13 13:13:57,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:57,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810958935] [2022-12-13 13:13:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:57,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810958935] [2022-12-13 13:13:57,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810958935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:13:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031162160] [2022-12-13 13:13:57,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 13:13:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:57,603 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:13:57,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 13:13:57,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 13:13:57,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:13:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:13:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:57,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:13:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:57,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031162160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:13:57,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:13:57,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-13 13:13:57,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129512634] [2022-12-13 13:13:57,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:13:57,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 13:13:57,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 13:13:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:13:57,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 13:13:57,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 873 places, 3163 transitions, 107588 flow. Second operand has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:13:57,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:13:57,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 13:13:57,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:16,788 INFO L130 PetriNetUnfolder]: 7760/15860 cut-off events. [2022-12-13 13:14:16,788 INFO L131 PetriNetUnfolder]: For 1181270/1181270 co-relation queries the response was YES. [2022-12-13 13:14:17,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233016 conditions, 15860 events. 7760/15860 cut-off events. For 1181270/1181270 co-relation queries the response was YES. Maximal size of possible extension queue 1211. Compared 151408 event pairs, 258 based on Foata normal form. 40/15900 useless extension candidates. Maximal degree in co-relation 232751. Up to 8467 conditions per place. [2022-12-13 13:14:17,087 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 2467 selfloop transitions, 1019 changer transitions 0/3486 dead transitions. [2022-12-13 13:14:17,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 885 places, 3486 transitions, 126636 flow [2022-12-13 13:14:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:14:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:14:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2100 transitions. [2022-12-13 13:14:17,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42016806722689076 [2022-12-13 13:14:17,089 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2100 transitions. [2022-12-13 13:14:17,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2100 transitions. [2022-12-13 13:14:17,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:17,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2100 transitions. [2022-12-13 13:14:17,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:17,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:17,093 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:17,093 INFO L175 Difference]: Start difference. First operand has 873 places, 3163 transitions, 107588 flow. Second operand 14 states and 2100 transitions. [2022-12-13 13:14:17,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 885 places, 3486 transitions, 126636 flow [2022-12-13 13:14:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 3486 transitions, 124843 flow, removed 194 selfloop flow, removed 29 redundant places. [2022-12-13 13:14:43,359 INFO L231 Difference]: Finished difference. Result has 860 places, 3318 transitions, 115807 flow [2022-12-13 13:14:43,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=105769, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=860, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=115807, PETRI_PLACES=860, PETRI_TRANSITIONS=3318} [2022-12-13 13:14:43,361 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 839 predicate places. [2022-12-13 13:14:43,361 INFO L495 AbstractCegarLoop]: Abstraction has has 860 places, 3318 transitions, 115807 flow [2022-12-13 13:14:43,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:43,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:14:43,361 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:43,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 13:14:43,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 13:14:43,562 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:14:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -561364582, now seen corresponding path program 37 times [2022-12-13 13:14:43,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:43,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865985313] [2022-12-13 13:14:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:43,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:14:44,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865985313] [2022-12-13 13:14:44,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865985313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572098231] [2022-12-13 13:14:44,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 13:14:44,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:44,311 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:44,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 13:14:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 13:14:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:44,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:14:44,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 13:14:44,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:14:44,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-13 13:14:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:14:44,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:44,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:14:44,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2022-12-13 13:14:44,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:14:44,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 52 [2022-12-13 13:14:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:14:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572098231] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:44,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:14:44,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2022-12-13 13:14:44,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213373120] [2022-12-13 13:14:44,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 13:14:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 13:14:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=510, Unknown=2, NotChecked=0, Total=600 [2022-12-13 13:14:46,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 357 [2022-12-13 13:14:46,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 3318 transitions, 115807 flow. Second operand has 25 states, 25 states have (on average 113.76) internal successors, (2844), 25 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:46,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:14:46,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 357 [2022-12-13 13:14:46,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:15:07,701 INFO L130 PetriNetUnfolder]: 7699/15761 cut-off events. [2022-12-13 13:15:07,701 INFO L131 PetriNetUnfolder]: For 1163351/1163361 co-relation queries the response was YES. [2022-12-13 13:15:07,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233986 conditions, 15761 events. 7699/15761 cut-off events. For 1163351/1163361 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 150876 event pairs, 450 based on Foata normal form. 10/15745 useless extension candidates. Maximal degree in co-relation 233733. Up to 15155 conditions per place. [2022-12-13 13:15:08,045 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 3174 selfloop transitions, 141 changer transitions 21/3355 dead transitions. [2022-12-13 13:15:08,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 870 places, 3355 transitions, 123282 flow [2022-12-13 13:15:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:15:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 13:15:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1292 transitions. [2022-12-13 13:15:08,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.329004329004329 [2022-12-13 13:15:08,046 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1292 transitions. [2022-12-13 13:15:08,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1292 transitions. [2022-12-13 13:15:08,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:15:08,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1292 transitions. [2022-12-13 13:15:08,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.45454545454545) internal successors, (1292), 11 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:08,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 357.0) internal successors, (4284), 12 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) [2022-12-13 13:15:08,049 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 357.0) internal successors, (4284), 12 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) [2022-12-13 13:15:08,049 INFO L175 Difference]: Start difference. First operand has 860 places, 3318 transitions, 115807 flow. Second operand 11 states and 1292 transitions. [2022-12-13 13:15:08,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 870 places, 3355 transitions, 123282 flow [2022-12-13 13:15:34,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 863 places, 3355 transitions, 122432 flow, removed 31 selfloop flow, removed 7 redundant places. [2022-12-13 13:15:35,034 INFO L231 Difference]: Finished difference. Result has 865 places, 3311 transitions, 115175 flow [2022-12-13 13:15:35,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=114957, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=115175, PETRI_PLACES=865, PETRI_TRANSITIONS=3311} [2022-12-13 13:15:35,036 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 844 predicate places. [2022-12-13 13:15:35,036 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 3311 transitions, 115175 flow [2022-12-13 13:15:35,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 113.76) internal successors, (2844), 25 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:35,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:15:35,036 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:15:35,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 13:15:35,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 13:15:35,238 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:15:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1105222285, now seen corresponding path program 38 times [2022-12-13 13:15:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:15:35,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34601489] [2022-12-13 13:15:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:35,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:15:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:15:37,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:15:37,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34601489] [2022-12-13 13:15:37,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34601489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:15:37,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411137147] [2022-12-13 13:15:37,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:15:37,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:15:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:15:37,410 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:15:37,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 13:15:37,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:15:37,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 13:15:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:37,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:15:37,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2022-12-13 13:15:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:15:37,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:15:38,449 INFO L321 Elim1Store]: treesize reduction 20, result has 92.8 percent of original size [2022-12-13 13:15:38,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 308 [2022-12-13 13:15:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:15:39,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411137147] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:15:39,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:15:39,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2022-12-13 13:15:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114291538] [2022-12-13 13:15:39,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:15:39,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 13:15:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:15:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 13:15:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:15:42,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 357 [2022-12-13 13:15:42,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 865 places, 3311 transitions, 115175 flow. Second operand has 26 states, 26 states have (on average 133.80769230769232) internal successors, (3479), 26 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:15:42,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:15:42,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 357 [2022-12-13 13:15:42,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:16:13,267 INFO L130 PetriNetUnfolder]: 11394/23381 cut-off events. [2022-12-13 13:16:13,267 INFO L131 PetriNetUnfolder]: For 1954642/1954652 co-relation queries the response was YES. [2022-12-13 13:16:13,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359974 conditions, 23381 events. 11394/23381 cut-off events. For 1954642/1954652 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 235608 event pairs, 976 based on Foata normal form. 46/23398 useless extension candidates. Maximal degree in co-relation 359721. Up to 15568 conditions per place. [2022-12-13 13:16:13,863 INFO L137 encePairwiseOnDemand]: 350/357 looper letters, 3623 selfloop transitions, 914 changer transitions 142/4698 dead transitions. [2022-12-13 13:16:13,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 888 places, 4698 transitions, 175715 flow [2022-12-13 13:16:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 13:16:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 13:16:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4304 transitions. [2022-12-13 13:16:13,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38890394867624467 [2022-12-13 13:16:13,866 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4304 transitions. [2022-12-13 13:16:13,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4304 transitions. [2022-12-13 13:16:13,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:16:13,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4304 transitions. [2022-12-13 13:16:13,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 138.83870967741936) internal successors, (4304), 31 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:13,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 357.0) internal successors, (11424), 32 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:13,874 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 357.0) internal successors, (11424), 32 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:16:13,874 INFO L175 Difference]: Start difference. First operand has 865 places, 3311 transitions, 115175 flow. Second operand 31 states and 4304 transitions. [2022-12-13 13:16:13,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 888 places, 4698 transitions, 175715 flow [2022-12-13 13:17:02,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 4698 transitions, 175075 flow, removed 50 selfloop flow, removed 9 redundant places. [2022-12-13 13:17:02,129 INFO L231 Difference]: Finished difference. Result has 899 places, 4111 transitions, 149383 flow [2022-12-13 13:17:02,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=114567, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=149383, PETRI_PLACES=899, PETRI_TRANSITIONS=4111} [2022-12-13 13:17:02,131 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 878 predicate places. [2022-12-13 13:17:02,131 INFO L495 AbstractCegarLoop]: Abstraction has has 899 places, 4111 transitions, 149383 flow [2022-12-13 13:17:02,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 133.80769230769232) internal successors, (3479), 26 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:17:02,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:17:02,131 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:17:02,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 13:17:02,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 13:17:02,332 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 13:17:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:17:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1257284757, now seen corresponding path program 39 times [2022-12-13 13:17:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:17:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122944703] [2022-12-13 13:17:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:17:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:17:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:17:04,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:17:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122944703] [2022-12-13 13:17:04,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122944703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:17:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983937543] [2022-12-13 13:17:04,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:17:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:17:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:17:04,028 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:17:04,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2876902c-29cc-413a-a42e-beb40610fc0f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 13:17:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 13:17:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:17:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 13:17:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:17:04,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 13:17:04,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:17:04,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 13:17:04,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:17:04,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2022-12-13 13:17:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:17:04,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:17:05,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 13:17:05,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 536 treesize of output 308 [2022-12-13 13:17:05,699 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2022-12-13 13:17:05,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 726 treesize of output 885 [2022-12-13 13:17:06,286 INFO L321 Elim1Store]: treesize reduction 12, result has 95.7 percent of original size [2022-12-13 13:17:06,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 566 treesize of output 638 [2022-12-13 13:17:06,975 INFO L321 Elim1Store]: treesize reduction 12, result has 95.7 percent of original size [2022-12-13 13:17:06,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 221 treesize of output 413