./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R --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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- 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-38b53e6 [2022-11-25 15:32:24,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:32:24,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:32:24,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:32:24,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:32:24,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:32:24,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:32:24,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:32:24,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:32:24,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:32:24,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:32:24,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:32:24,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:32:24,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:32:24,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:32:24,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:32:24,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:32:24,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:32:24,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:32:24,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:32:24,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:32:24,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:32:24,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:32:24,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:32:24,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:32:24,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:32:24,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:32:24,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:32:24,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:32:24,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:32:24,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:32:24,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:32:24,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:32:24,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:32:24,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:32:24,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:32:24,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:32:24,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:32:24,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:32:24,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:32:24,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:32:24,413 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:32:24,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:32:24,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:32:24,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:32:24,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:32:24,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:32:24,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:32:24,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:32:24,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:32:24,447 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:32:24,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:32:24,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:32:24,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:32:24,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:32:24,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:32:24,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:32:24,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:32:24,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:32:24,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:32:24,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:32:24,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:32:24,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:32:24,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:32:24,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:32:24,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:32:24,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:32:24,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:32:24,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:32:24,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:32:24,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:32:24,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:32:24,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:32:24,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:32:24,456 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:32:24,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:32:24,457 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_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-11-25 15:32:24,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:32:24,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:32:24,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:32:24,766 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:32:24,766 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:32:24,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-25 15:32:27,713 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:32:27,882 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:32:27,883 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-25 15:32:27,889 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/data/a40e4bd24/60d529990dd64fe4b57c50d5c0eff654/FLAG1869be8fb [2022-11-25 15:32:27,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/data/a40e4bd24/60d529990dd64fe4b57c50d5c0eff654 [2022-11-25 15:32:27,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:32:27,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:32:27,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:32:27,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:32:27,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:32:27,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:32:27" (1/1) ... [2022-11-25 15:32:27,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b324031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:27, skipping insertion in model container [2022-11-25 15:32:27,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:32:27" (1/1) ... [2022-11-25 15:32:27,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:32:27,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:32:28,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:28,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:28,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:28,151 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:28,169 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_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-25 15:32:28,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:32:28,201 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:32:28,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:28,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:28,227 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:28,231 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:28,248 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_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-25 15:32:28,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:32:28,271 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:32:28,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28 WrapperNode [2022-11-25 15:32:28,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:32:28,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:32:28,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:32:28,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:32:28,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,338 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-11-25 15:32:28,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:32:28,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:32:28,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:32:28,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:32:28,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,388 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:32:28,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:32:28,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:32:28,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:32:28,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (1/1) ... [2022-11-25 15:32:28,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:32:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:28,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:32:28,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:32:28,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:32:28,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:32:28,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:32:28,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:32:28,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:32:28,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:32:28,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:32:28,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:32:28,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:32:28,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:32:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:32:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:32:28,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:32:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:32:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:32:28,494 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:32:28,622 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:32:28,624 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:32:28,942 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:32:29,121 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:32:29,127 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:32:29,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:32:29 BoogieIcfgContainer [2022-11-25 15:32:29,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:32:29,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:32:29,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:32:29,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:32:29,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:32:27" (1/3) ... [2022-11-25 15:32:29,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644d7dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:32:29, skipping insertion in model container [2022-11-25 15:32:29,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:28" (2/3) ... [2022-11-25 15:32:29,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644d7dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:32:29, skipping insertion in model container [2022-11-25 15:32:29,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:32:29" (3/3) ... [2022-11-25 15:32:29,146 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-11-25 15:32:29,156 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:32:29,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:32:29,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:32:29,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:32:29,283 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:32:29,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-11-25 15:32:29,423 INFO L130 PetriNetUnfolder]: 9/114 cut-off events. [2022-11-25 15:32:29,423 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:29,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-25 15:32:29,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-11-25 15:32:29,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-11-25 15:32:29,442 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:29,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2022-11-25 15:32:29,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2022-11-25 15:32:29,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2022-11-25 15:32:29,559 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2022-11-25 15:32:29,561 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-25 15:32:29,564 INFO L119 LiptonReduction]: Number of co-enabled transitions 368 [2022-11-25 15:32:34,927 INFO L134 LiptonReduction]: Checked pairs total: 457 [2022-11-25 15:32:34,928 INFO L136 LiptonReduction]: Total number of compositions: 113 [2022-11-25 15:32:34,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:32:34,950 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;@22de5ae9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:32:34,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 15:32:34,955 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2022-11-25 15:32:34,955 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:34,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:34,956 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:34,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2040237074, now seen corresponding path program 1 times [2022-11-25 15:32:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:34,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104951473] [2022-11-25 15:32:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:34,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104951473] [2022-11-25 15:32:35,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104951473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:35,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:35,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:32:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782968611] [2022-11-25 15:32:35,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:35,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:35,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:35,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2022-11-25 15:32:35,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:35,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2022-11-25 15:32:35,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:35,544 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2022-11-25 15:32:35,544 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 15:32:35,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2022-11-25 15:32:35,546 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2022-11-25 15:32:35,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2022-11-25 15:32:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2022-11-25 15:32:35,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4759825327510917 [2022-11-25 15:32:35,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2022-11-25 15:32:35,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2022-11-25 15:32:35,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:35,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2022-11-25 15:32:35,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,613 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 327 transitions. [2022-11-25 15:32:35,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2022-11-25 15:32:35,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:32:35,619 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2022-11-25 15:32:35,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-11-25 15:32:35,627 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2022-11-25 15:32:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2022-11-25 15:32:35,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:35,631 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:32:35,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash 502349014, now seen corresponding path program 1 times [2022-11-25 15:32:35,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:35,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808964454] [2022-11-25 15:32:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:35,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808964454] [2022-11-25 15:32:35,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808964454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:35,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:35,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:32:35,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153462105] [2022-11-25 15:32:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:35,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:32:35,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:32:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:32:35,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-25 15:32:35,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:35,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-25 15:32:35,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:35,829 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2022-11-25 15:32:35,829 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-25 15:32:35,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 253 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2022-11-25 15:32:35,830 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2022-11-25 15:32:35,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2022-11-25 15:32:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:32:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:32:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2022-11-25 15:32:35,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48180494905385735 [2022-11-25 15:32:35,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2022-11-25 15:32:35,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2022-11-25 15:32:35,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:35,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2022-11-25 15:32:35,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,838 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 331 transitions. [2022-11-25 15:32:35,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2022-11-25 15:32:35,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:32:35,839 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2022-11-25 15:32:35,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2022-11-25 15:32:35,840 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2022-11-25 15:32:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2022-11-25 15:32:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:35,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:35,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:35,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:32:35,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1480786137, now seen corresponding path program 1 times [2022-11-25 15:32:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797220985] [2022-11-25 15:32:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797220985] [2022-11-25 15:32:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797220985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:32:36,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:32:36,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:32:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131733112] [2022-11-25 15:32:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:32:36,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:32:36,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:32:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:32:36,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2022-11-25 15:32:36,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:36,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:36,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2022-11-25 15:32:36,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:36,255 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2022-11-25 15:32:36,255 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-25 15:32:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 371 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2022-11-25 15:32:36,257 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2022-11-25 15:32:36,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2022-11-25 15:32:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:32:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:32:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2022-11-25 15:32:36,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4443231441048035 [2022-11-25 15:32:36,259 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2022-11-25 15:32:36,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2022-11-25 15:32:36,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:36,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2022-11-25 15:32:36,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:36,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:36,265 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:36,265 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 407 transitions. [2022-11-25 15:32:36,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2022-11-25 15:32:36,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:32:36,266 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2022-11-25 15:32:36,267 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2022-11-25 15:32:36,267 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2022-11-25 15:32:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2022-11-25 15:32:36,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:36,268 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:36,268 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:36,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:32:36,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:36,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2019706179, now seen corresponding path program 1 times [2022-11-25 15:32:36,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:36,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39459746] [2022-11-25 15:32:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39459746] [2022-11-25 15:32:36,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39459746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932598608] [2022-11-25 15:32:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:36,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:36,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:36,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:32:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:36,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:32:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:36,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:32:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:37,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:37,069 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 15:32:37,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2022-11-25 15:32:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:37,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932598608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:37,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:37,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2022-11-25 15:32:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499776799] [2022-11-25 15:32:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:37,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:32:37,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:32:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:32:37,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 229 [2022-11-25 15:32:37,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 8 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:37,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:37,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 229 [2022-11-25 15:32:37,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:37,347 INFO L130 PetriNetUnfolder]: 86/165 cut-off events. [2022-11-25 15:32:37,347 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-25 15:32:37,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 165 events. 86/165 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 511 event pairs, 13 based on Foata normal form. 1/165 useless extension candidates. Maximal degree in co-relation 403. Up to 58 conditions per place. [2022-11-25 15:32:37,349 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 28 selfloop transitions, 6 changer transitions 9/43 dead transitions. [2022-11-25 15:32:37,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 43 transitions, 222 flow [2022-11-25 15:32:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:32:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:32:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 502 transitions. [2022-11-25 15:32:37,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43842794759825326 [2022-11-25 15:32:37,351 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 502 transitions. [2022-11-25 15:32:37,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 502 transitions. [2022-11-25 15:32:37,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:37,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 502 transitions. [2022-11-25 15:32:37,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:37,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:37,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:37,357 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 5 states and 502 transitions. [2022-11-25 15:32:37,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 43 transitions, 222 flow [2022-11-25 15:32:37,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 216 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 15:32:37,359 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 99 flow [2022-11-25 15:32:37,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2022-11-25 15:32:37,360 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2022-11-25 15:32:37,360 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 99 flow [2022-11-25 15:32:37,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:37,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:37,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:37,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:37,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:37,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1853163061, now seen corresponding path program 2 times [2022-11-25 15:32:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:37,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916055535] [2022-11-25 15:32:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:37,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:38,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916055535] [2022-11-25 15:32:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916055535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:38,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557895392] [2022-11-25 15:32:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:32:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:38,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:38,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:32:38,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:32:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 15:32:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:38,298 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 [2022-11-25 15:32:38,347 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 [2022-11-25 15:32:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:32:38,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 15:32:38,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:32:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:38,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:38,631 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5)))) is different from false [2022-11-25 15:32:38,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:32:38,646 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 60 treesize of output 48 [2022-11-25 15:32:38,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:32:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 97 [2022-11-25 15:32:38,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:32:38,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2022-11-25 15:32:38,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-25 15:32:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-25 15:32:38,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557895392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:38,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:38,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-11-25 15:32:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453644082] [2022-11-25 15:32:38,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:32:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:32:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=161, Unknown=3, NotChecked=26, Total=240 [2022-11-25 15:32:38,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 229 [2022-11-25 15:32:38,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 99 flow. Second operand has 16 states, 16 states have (on average 76.125) internal successors, (1218), 16 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:38,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:38,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 229 [2022-11-25 15:32:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:39,157 INFO L130 PetriNetUnfolder]: 102/194 cut-off events. [2022-11-25 15:32:39,157 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-11-25 15:32:39,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 194 events. 102/194 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 626 event pairs, 18 based on Foata normal form. 1/194 useless extension candidates. Maximal degree in co-relation 520. Up to 64 conditions per place. [2022-11-25 15:32:39,161 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 27 selfloop transitions, 7 changer transitions 9/43 dead transitions. [2022-11-25 15:32:39,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 244 flow [2022-11-25 15:32:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:32:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:32:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-11-25 15:32:39,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3537117903930131 [2022-11-25 15:32:39,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-11-25 15:32:39,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-11-25 15:32:39,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:39,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-11-25 15:32:39,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,172 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,172 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 99 flow. Second operand 6 states and 486 transitions. [2022-11-25 15:32:39,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 244 flow [2022-11-25 15:32:39,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:32:39,178 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 122 flow [2022-11-25 15:32:39,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-11-25 15:32:39,181 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 12 predicate places. [2022-11-25 15:32:39,181 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 122 flow [2022-11-25 15:32:39,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 76.125) internal successors, (1218), 16 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:39,182 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:39,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:39,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1253406587, now seen corresponding path program 3 times [2022-11-25 15:32:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951346237] [2022-11-25 15:32:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:39,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951346237] [2022-11-25 15:32:39,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951346237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:39,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793338428] [2022-11-25 15:32:39,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:32:39,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:39,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:39,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:39,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:32:39,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:32:39,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:32:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:39,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793338428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:39,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:39,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-25 15:32:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119320924] [2022-11-25 15:32:39,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:32:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:32:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:32:39,664 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-25 15:32:39,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:39,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-25 15:32:39,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:39,784 INFO L130 PetriNetUnfolder]: 218/422 cut-off events. [2022-11-25 15:32:39,784 INFO L131 PetriNetUnfolder]: For 678/678 co-relation queries the response was YES. [2022-11-25 15:32:39,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 422 events. 218/422 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1824 event pairs, 65 based on Foata normal form. 18/439 useless extension candidates. Maximal degree in co-relation 1182. Up to 182 conditions per place. [2022-11-25 15:32:39,788 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 37 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2022-11-25 15:32:39,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 328 flow [2022-11-25 15:32:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:32:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:32:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2022-11-25 15:32:39,790 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48580786026200873 [2022-11-25 15:32:39,790 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2022-11-25 15:32:39,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2022-11-25 15:32:39,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:39,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2022-11-25 15:32:39,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,795 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 122 flow. Second operand 4 states and 445 transitions. [2022-11-25 15:32:39,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 328 flow [2022-11-25 15:32:39,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 306 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-25 15:32:39,801 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 210 flow [2022-11-25 15:32:39,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2022-11-25 15:32:39,803 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2022-11-25 15:32:39,803 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 210 flow [2022-11-25 15:32:39,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:39,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:39,804 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:39,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:40,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2140740952, now seen corresponding path program 4 times [2022-11-25 15:32:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661413323] [2022-11-25 15:32:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:40,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:40,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:40,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661413323] [2022-11-25 15:32:40,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661413323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:40,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044730424] [2022-11-25 15:32:40,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:32:40,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:40,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:40,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:32:40,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:32:40,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:32:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:40,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:40,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044730424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:40,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:40,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-25 15:32:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281607261] [2022-11-25 15:32:40,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:40,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:32:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:32:40,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:32:40,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-25 15:32:40,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 95.64285714285714) internal successors, (1339), 14 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:40,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:40,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-25 15:32:40,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:41,160 INFO L130 PetriNetUnfolder]: 272/553 cut-off events. [2022-11-25 15:32:41,160 INFO L131 PetriNetUnfolder]: For 1175/1175 co-relation queries the response was YES. [2022-11-25 15:32:41,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 553 events. 272/553 cut-off events. For 1175/1175 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2725 event pairs, 176 based on Foata normal form. 19/570 useless extension candidates. Maximal degree in co-relation 1347. Up to 422 conditions per place. [2022-11-25 15:32:41,164 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 27 selfloop transitions, 3 changer transitions 27/57 dead transitions. [2022-11-25 15:32:41,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 434 flow [2022-11-25 15:32:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:32:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:32:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 696 transitions. [2022-11-25 15:32:41,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43418590143480973 [2022-11-25 15:32:41,167 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 696 transitions. [2022-11-25 15:32:41,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 696 transitions. [2022-11-25 15:32:41,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:41,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 696 transitions. [2022-11-25 15:32:41,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.42857142857143) internal successors, (696), 7 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:41,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:41,174 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:41,174 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 210 flow. Second operand 7 states and 696 transitions. [2022-11-25 15:32:41,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 434 flow [2022-11-25 15:32:41,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 424 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-25 15:32:41,178 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 230 flow [2022-11-25 15:32:41,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-11-25 15:32:41,179 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2022-11-25 15:32:41,179 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 230 flow [2022-11-25 15:32:41,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.64285714285714) internal successors, (1339), 14 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:41,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:41,180 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:41,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:41,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:32:41,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:41,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1771270590, now seen corresponding path program 5 times [2022-11-25 15:32:41,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:41,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298921785] [2022-11-25 15:32:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:41,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:41,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298921785] [2022-11-25 15:32:41,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298921785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:41,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659838039] [2022-11-25 15:32:41,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:32:41,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:41,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:41,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:41,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:32:42,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:32:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 15:32:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:42,305 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 15:32:42,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-11-25 15:32:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:42,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:42,435 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 15:32:42,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-25 15:32:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:42,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659838039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:42,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:42,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2022-11-25 15:32:42,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695973960] [2022-11-25 15:32:42,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:42,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:32:42,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:32:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:32:42,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 229 [2022-11-25 15:32:42,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 230 flow. Second operand has 17 states, 17 states have (on average 90.70588235294117) internal successors, (1542), 17 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:42,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:42,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 229 [2022-11-25 15:32:42,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:43,832 INFO L130 PetriNetUnfolder]: 332/632 cut-off events. [2022-11-25 15:32:43,832 INFO L131 PetriNetUnfolder]: For 1154/1154 co-relation queries the response was YES. [2022-11-25 15:32:43,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 632 events. 332/632 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2979 event pairs, 21 based on Foata normal form. 1/632 useless extension candidates. Maximal degree in co-relation 2049. Up to 126 conditions per place. [2022-11-25 15:32:43,837 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 89 selfloop transitions, 26 changer transitions 34/149 dead transitions. [2022-11-25 15:32:43,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 149 transitions, 948 flow [2022-11-25 15:32:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:32:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:32:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1729 transitions. [2022-11-25 15:32:43,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41945657447840856 [2022-11-25 15:32:43,843 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1729 transitions. [2022-11-25 15:32:43,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1729 transitions. [2022-11-25 15:32:43,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:43,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1729 transitions. [2022-11-25 15:32:43,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 96.05555555555556) internal successors, (1729), 18 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:43,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:43,857 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:43,858 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 230 flow. Second operand 18 states and 1729 transitions. [2022-11-25 15:32:43,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 149 transitions, 948 flow [2022-11-25 15:32:43,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 149 transitions, 922 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-25 15:32:43,864 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 383 flow [2022-11-25 15:32:43,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=383, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2022-11-25 15:32:43,865 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 33 predicate places. [2022-11-25 15:32:43,865 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 383 flow [2022-11-25 15:32:43,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.70588235294117) internal successors, (1542), 17 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:43,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:43,866 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:43,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:44,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 853982090, now seen corresponding path program 6 times [2022-11-25 15:32:44,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:44,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922203220] [2022-11-25 15:32:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922203220] [2022-11-25 15:32:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922203220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870748258] [2022-11-25 15:32:44,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:32:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:44,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:44,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:32:44,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:32:44,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 15:32:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:44,705 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 [2022-11-25 15:32:44,749 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 [2022-11-25 15:32:44,784 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 [2022-11-25 15:32:44,931 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-25 15:32:44,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-25 15:32:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:44,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:45,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:32:45,325 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 65 treesize of output 53 [2022-11-25 15:32:45,345 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 15:32:45,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 303 [2022-11-25 15:32:45,360 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 15:32:45,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 230 [2022-11-25 15:32:45,378 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 15:32:45,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 150 [2022-11-25 15:32:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:45,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870748258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:45,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:45,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2022-11-25 15:32:45,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582921972] [2022-11-25 15:32:45,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:45,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:32:45,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:45,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:32:45,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=380, Unknown=3, NotChecked=0, Total=462 [2022-11-25 15:32:46,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 229 [2022-11-25 15:32:46,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 383 flow. Second operand has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:46,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:46,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 229 [2022-11-25 15:32:46,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:48,156 INFO L130 PetriNetUnfolder]: 1263/2372 cut-off events. [2022-11-25 15:32:48,157 INFO L131 PetriNetUnfolder]: For 6035/6035 co-relation queries the response was YES. [2022-11-25 15:32:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8240 conditions, 2372 events. 1263/2372 cut-off events. For 6035/6035 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14481 event pairs, 122 based on Foata normal form. 23/2393 useless extension candidates. Maximal degree in co-relation 5674. Up to 486 conditions per place. [2022-11-25 15:32:48,171 INFO L137 encePairwiseOnDemand]: 222/229 looper letters, 153 selfloop transitions, 81 changer transitions 64/298 dead transitions. [2022-11-25 15:32:48,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 298 transitions, 2435 flow [2022-11-25 15:32:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 15:32:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 15:32:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2248 transitions. [2022-11-25 15:32:48,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3272197962154294 [2022-11-25 15:32:48,180 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2248 transitions. [2022-11-25 15:32:48,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2248 transitions. [2022-11-25 15:32:48,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:48,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2248 transitions. [2022-11-25 15:32:48,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.93333333333334) internal successors, (2248), 30 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:48,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 229.0) internal successors, (7099), 31 states have internal predecessors, (7099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:48,201 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 229.0) internal successors, (7099), 31 states have internal predecessors, (7099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:48,201 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 383 flow. Second operand 30 states and 2248 transitions. [2022-11-25 15:32:48,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 298 transitions, 2435 flow [2022-11-25 15:32:48,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 298 transitions, 2030 flow, removed 128 selfloop flow, removed 7 redundant places. [2022-11-25 15:32:48,220 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 1209 flow [2022-11-25 15:32:48,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1209, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2022-11-25 15:32:48,221 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 69 predicate places. [2022-11-25 15:32:48,221 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 1209 flow [2022-11-25 15:32:48,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:48,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:48,222 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:48,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:48,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:48,430 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:48,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1429744684, now seen corresponding path program 7 times [2022-11-25 15:32:48,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:48,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031844337] [2022-11-25 15:32:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:49,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031844337] [2022-11-25 15:32:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031844337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435793604] [2022-11-25 15:32:49,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:32:49,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:49,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:49,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:32:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 15:32:49,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:32:49,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 15:32:49,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 15:32:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:49,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:49,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:32:49,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-11-25 15:32:49,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-25 15:32:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:49,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435793604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:49,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:49,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-11-25 15:32:49,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217650814] [2022-11-25 15:32:49,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:49,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:32:49,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:32:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=521, Unknown=3, NotChecked=0, Total=600 [2022-11-25 15:32:50,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 229 [2022-11-25 15:32:50,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 1209 flow. Second operand has 25 states, 25 states have (on average 83.88) internal successors, (2097), 25 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:50,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:50,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 229 [2022-11-25 15:32:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:52,132 INFO L130 PetriNetUnfolder]: 1279/2399 cut-off events. [2022-11-25 15:32:52,132 INFO L131 PetriNetUnfolder]: For 9315/9315 co-relation queries the response was YES. [2022-11-25 15:32:52,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 2399 events. 1279/2399 cut-off events. For 9315/9315 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14600 event pairs, 188 based on Foata normal form. 3/2400 useless extension candidates. Maximal degree in co-relation 7582. Up to 492 conditions per place. [2022-11-25 15:32:52,151 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 89 selfloop transitions, 84 changer transitions 28/201 dead transitions. [2022-11-25 15:32:52,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 201 transitions, 2025 flow [2022-11-25 15:32:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:32:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 15:32:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1513 transitions. [2022-11-25 15:32:52,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.388646288209607 [2022-11-25 15:32:52,158 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1513 transitions. [2022-11-25 15:32:52,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1513 transitions. [2022-11-25 15:32:52,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:52,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1513 transitions. [2022-11-25 15:32:52,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.0) internal successors, (1513), 17 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:52,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:52,172 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:52,173 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 1209 flow. Second operand 17 states and 1513 transitions. [2022-11-25 15:32:52,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 201 transitions, 2025 flow [2022-11-25 15:32:52,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 201 transitions, 1842 flow, removed 88 selfloop flow, removed 3 redundant places. [2022-11-25 15:32:52,231 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1258 flow [2022-11-25 15:32:52,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1258, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2022-11-25 15:32:52,232 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 83 predicate places. [2022-11-25 15:32:52,232 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1258 flow [2022-11-25 15:32:52,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.88) internal successors, (2097), 25 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:52,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:52,234 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:52,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:52,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:52,440 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1641749000, now seen corresponding path program 8 times [2022-11-25 15:32:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921967088] [2022-11-25 15:32:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921967088] [2022-11-25 15:32:52,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921967088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182655423] [2022-11-25 15:32:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:32:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:52,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:52,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:32:52,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:32:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:32:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:52,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:52,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182655423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:52,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:52,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-25 15:32:52,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895232783] [2022-11-25 15:32:52,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:52,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:32:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:32:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:32:52,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-25 15:32:52,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1258 flow. Second operand has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:52,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:52,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-25 15:32:52,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:53,596 INFO L130 PetriNetUnfolder]: 2541/4758 cut-off events. [2022-11-25 15:32:53,596 INFO L131 PetriNetUnfolder]: For 20920/20920 co-relation queries the response was YES. [2022-11-25 15:32:53,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18585 conditions, 4758 events. 2541/4758 cut-off events. For 20920/20920 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33581 event pairs, 550 based on Foata normal form. 66/4824 useless extension candidates. Maximal degree in co-relation 15632. Up to 1845 conditions per place. [2022-11-25 15:32:53,635 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 108 selfloop transitions, 111 changer transitions 0/219 dead transitions. [2022-11-25 15:32:53,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 219 transitions, 2856 flow [2022-11-25 15:32:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:32:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:32:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2022-11-25 15:32:53,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4873362445414847 [2022-11-25 15:32:53,638 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2022-11-25 15:32:53,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2022-11-25 15:32:53,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:53,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2022-11-25 15:32:53,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:53,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:53,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:53,643 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1258 flow. Second operand 5 states and 558 transitions. [2022-11-25 15:32:53,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 219 transitions, 2856 flow [2022-11-25 15:32:53,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 219 transitions, 2622 flow, removed 31 selfloop flow, removed 10 redundant places. [2022-11-25 15:32:53,761 INFO L231 Difference]: Finished difference. Result has 99 places, 193 transitions, 2607 flow [2022-11-25 15:32:53,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2607, PETRI_PLACES=99, PETRI_TRANSITIONS=193} [2022-11-25 15:32:53,762 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 80 predicate places. [2022-11-25 15:32:53,762 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 193 transitions, 2607 flow [2022-11-25 15:32:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:53,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:53,763 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:53,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:53,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:32:53,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash 139768153, now seen corresponding path program 9 times [2022-11-25 15:32:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:53,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354101394] [2022-11-25 15:32:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:54,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:54,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354101394] [2022-11-25 15:32:54,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354101394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:54,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62122027] [2022-11-25 15:32:54,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:32:54,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:54,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:54,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:54,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:32:54,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:32:54,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:54,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:32:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:54,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:32:54,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62122027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:54,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:54,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-25 15:32:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597773288] [2022-11-25 15:32:54,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:54,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:32:54,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:32:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:32:55,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-25 15:32:55,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 193 transitions, 2607 flow. Second operand has 23 states, 23 states have (on average 94.78260869565217) internal successors, (2180), 23 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:55,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:55,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-25 15:32:55,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:56,127 INFO L130 PetriNetUnfolder]: 1003/1948 cut-off events. [2022-11-25 15:32:56,127 INFO L131 PetriNetUnfolder]: For 10684/10684 co-relation queries the response was YES. [2022-11-25 15:32:56,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8369 conditions, 1948 events. 1003/1948 cut-off events. For 10684/10684 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12192 event pairs, 604 based on Foata normal form. 48/1996 useless extension candidates. Maximal degree in co-relation 8196. Up to 1528 conditions per place. [2022-11-25 15:32:56,147 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 71 selfloop transitions, 4 changer transitions 65/140 dead transitions. [2022-11-25 15:32:56,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 140 transitions, 1660 flow [2022-11-25 15:32:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:32:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:32:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1195 transitions. [2022-11-25 15:32:56,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43486171761280934 [2022-11-25 15:32:56,151 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1195 transitions. [2022-11-25 15:32:56,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1195 transitions. [2022-11-25 15:32:56,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:56,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1195 transitions. [2022-11-25 15:32:56,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.58333333333333) internal successors, (1195), 12 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:56,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:56,176 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:56,177 INFO L175 Difference]: Start difference. First operand has 99 places, 193 transitions, 2607 flow. Second operand 12 states and 1195 transitions. [2022-11-25 15:32:56,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 140 transitions, 1660 flow [2022-11-25 15:32:56,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1517 flow, removed 29 selfloop flow, removed 7 redundant places. [2022-11-25 15:32:56,221 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 910 flow [2022-11-25 15:32:56,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=910, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2022-11-25 15:32:56,223 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 77 predicate places. [2022-11-25 15:32:56,224 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 910 flow [2022-11-25 15:32:56,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 94.78260869565217) internal successors, (2180), 23 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:56,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:56,226 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:32:56,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:56,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:32:56,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:32:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1335797207, now seen corresponding path program 10 times [2022-11-25 15:32:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459538539] [2022-11-25 15:32:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:32:57,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459538539] [2022-11-25 15:32:57,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459538539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324335763] [2022-11-25 15:32:57,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:32:57,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:57,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:57,116 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:57,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:32:57,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:32:57,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:57,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 15:32:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:57,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 15:32:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:32:57,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:57,523 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 15:32:57,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-25 15:32:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:32:57,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324335763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:57,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:57,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 23 [2022-11-25 15:32:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118223496] [2022-11-25 15:32:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:32:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:32:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:32:58,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-25 15:32:58,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 910 flow. Second operand has 25 states, 25 states have (on average 92.12) internal successors, (2303), 25 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:58,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:58,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-25 15:32:58,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:00,110 INFO L130 PetriNetUnfolder]: 1230/2278 cut-off events. [2022-11-25 15:33:00,110 INFO L131 PetriNetUnfolder]: For 7609/7609 co-relation queries the response was YES. [2022-11-25 15:33:00,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8583 conditions, 2278 events. 1230/2278 cut-off events. For 7609/7609 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13948 event pairs, 53 based on Foata normal form. 20/2298 useless extension candidates. Maximal degree in co-relation 8539. Up to 468 conditions per place. [2022-11-25 15:33:00,125 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 138 selfloop transitions, 98 changer transitions 128/364 dead transitions. [2022-11-25 15:33:00,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 364 transitions, 2829 flow [2022-11-25 15:33:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 15:33:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-25 15:33:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4115 transitions. [2022-11-25 15:33:00,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4278436265335829 [2022-11-25 15:33:00,132 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4115 transitions. [2022-11-25 15:33:00,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4115 transitions. [2022-11-25 15:33:00,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:00,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4115 transitions. [2022-11-25 15:33:00,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 97.97619047619048) internal successors, (4115), 42 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:00,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 229.0) internal successors, (9847), 43 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:00,155 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 229.0) internal successors, (9847), 43 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:00,155 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 910 flow. Second operand 42 states and 4115 transitions. [2022-11-25 15:33:00,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 364 transitions, 2829 flow [2022-11-25 15:33:00,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 364 transitions, 2515 flow, removed 133 selfloop flow, removed 17 redundant places. [2022-11-25 15:33:00,188 INFO L231 Difference]: Finished difference. Result has 117 places, 114 transitions, 1467 flow [2022-11-25 15:33:00,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1467, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2022-11-25 15:33:00,189 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 98 predicate places. [2022-11-25 15:33:00,189 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 1467 flow [2022-11-25 15:33:00,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 92.12) internal successors, (2303), 25 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:00,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:00,190 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:00,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:00,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:33:00,396 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1788903509, now seen corresponding path program 11 times [2022-11-25 15:33:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611637698] [2022-11-25 15:33:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:00,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:01,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611637698] [2022-11-25 15:33:01,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611637698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242808221] [2022-11-25 15:33:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:33:01,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:01,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:01,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:33:01,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:33:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 15:33:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:01,502 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 [2022-11-25 15:33:01,548 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:33:01,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:33:01,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 15:33:01,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 15:33:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:01,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:02,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:02,472 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 62 treesize of output 50 [2022-11-25 15:33:02,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:02,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 174 [2022-11-25 15:33:02,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:02,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-11-25 15:33:02,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 94 [2022-11-25 15:33:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:02,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242808221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:02,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:02,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 32 [2022-11-25 15:33:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012772220] [2022-11-25 15:33:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:02,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:33:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:33:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1002, Unknown=2, NotChecked=0, Total=1122 [2022-11-25 15:33:03,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2022-11-25 15:33:03,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 1467 flow. Second operand has 34 states, 34 states have (on average 82.6470588235294) internal successors, (2810), 34 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:03,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:03,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2022-11-25 15:33:03,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:05,921 INFO L130 PetriNetUnfolder]: 1368/2533 cut-off events. [2022-11-25 15:33:05,921 INFO L131 PetriNetUnfolder]: For 7561/7561 co-relation queries the response was YES. [2022-11-25 15:33:05,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9496 conditions, 2533 events. 1368/2533 cut-off events. For 7561/7561 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15924 event pairs, 244 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 9437. Up to 1054 conditions per place. [2022-11-25 15:33:05,943 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 122 selfloop transitions, 70 changer transitions 60/252 dead transitions. [2022-11-25 15:33:05,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 252 transitions, 2502 flow [2022-11-25 15:33:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:33:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 15:33:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2030 transitions. [2022-11-25 15:33:05,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3854186443895956 [2022-11-25 15:33:05,947 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2030 transitions. [2022-11-25 15:33:05,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2030 transitions. [2022-11-25 15:33:05,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:05,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2030 transitions. [2022-11-25 15:33:05,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.26086956521739) internal successors, (2030), 23 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:05,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 229.0) internal successors, (5496), 24 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:05,957 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 229.0) internal successors, (5496), 24 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:05,958 INFO L175 Difference]: Start difference. First operand has 117 places, 114 transitions, 1467 flow. Second operand 23 states and 2030 transitions. [2022-11-25 15:33:05,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 252 transitions, 2502 flow [2022-11-25 15:33:06,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 252 transitions, 2181 flow, removed 62 selfloop flow, removed 13 redundant places. [2022-11-25 15:33:06,007 INFO L231 Difference]: Finished difference. Result has 132 places, 126 transitions, 1539 flow [2022-11-25 15:33:06,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1539, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2022-11-25 15:33:06,008 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2022-11-25 15:33:06,009 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 1539 flow [2022-11-25 15:33:06,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.6470588235294) internal successors, (2810), 34 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:06,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:06,010 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:06,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:06,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:33:06,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash -186406107, now seen corresponding path program 12 times [2022-11-25 15:33:06,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:06,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894682951] [2022-11-25 15:33:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:06,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:06,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:06,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894682951] [2022-11-25 15:33:06,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894682951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:06,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541551384] [2022-11-25 15:33:06,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:33:06,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:06,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:06,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:06,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:33:06,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:33:06,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:06,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:33:06,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:06,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:06,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541551384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:06,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:06,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-25 15:33:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669263958] [2022-11-25 15:33:06,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:33:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:33:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:33:06,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-25 15:33:06,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 1539 flow. Second operand has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:06,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:06,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-25 15:33:06,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:07,550 INFO L130 PetriNetUnfolder]: 2698/4969 cut-off events. [2022-11-25 15:33:07,551 INFO L131 PetriNetUnfolder]: For 18777/18777 co-relation queries the response was YES. [2022-11-25 15:33:07,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17963 conditions, 4969 events. 2698/4969 cut-off events. For 18777/18777 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34995 event pairs, 453 based on Foata normal form. 24/4993 useless extension candidates. Maximal degree in co-relation 17899. Up to 1446 conditions per place. [2022-11-25 15:33:07,597 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 95 selfloop transitions, 148 changer transitions 0/243 dead transitions. [2022-11-25 15:33:07,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 243 transitions, 3467 flow [2022-11-25 15:33:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:33:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:33:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 671 transitions. [2022-11-25 15:33:07,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4883551673944687 [2022-11-25 15:33:07,600 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 671 transitions. [2022-11-25 15:33:07,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 671 transitions. [2022-11-25 15:33:07,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:07,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 671 transitions. [2022-11-25 15:33:07,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:07,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:07,604 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:07,604 INFO L175 Difference]: Start difference. First operand has 132 places, 126 transitions, 1539 flow. Second operand 6 states and 671 transitions. [2022-11-25 15:33:07,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 243 transitions, 3467 flow [2022-11-25 15:33:07,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 243 transitions, 3299 flow, removed 28 selfloop flow, removed 12 redundant places. [2022-11-25 15:33:07,690 INFO L231 Difference]: Finished difference. Result has 126 places, 210 transitions, 3013 flow [2022-11-25 15:33:07,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3013, PETRI_PLACES=126, PETRI_TRANSITIONS=210} [2022-11-25 15:33:07,692 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 107 predicate places. [2022-11-25 15:33:07,692 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 210 transitions, 3013 flow [2022-11-25 15:33:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:07,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:07,693 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:07,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:07,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:33:07,900 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1070799196, now seen corresponding path program 13 times [2022-11-25 15:33:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846144764] [2022-11-25 15:33:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846144764] [2022-11-25 15:33:08,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846144764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:08,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583424173] [2022-11-25 15:33:08,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:33:08,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:08,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:08,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:33:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:08,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:33:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:08,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:08,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583424173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:08,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:08,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-11-25 15:33:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064885401] [2022-11-25 15:33:08,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:08,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:33:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:33:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2022-11-25 15:33:09,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-25 15:33:09,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 210 transitions, 3013 flow. Second operand has 29 states, 29 states have (on average 94.62068965517241) internal successors, (2744), 29 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:09,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:09,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-25 15:33:09,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:10,899 INFO L130 PetriNetUnfolder]: 3224/6071 cut-off events. [2022-11-25 15:33:10,900 INFO L131 PetriNetUnfolder]: For 19342/19342 co-relation queries the response was YES. [2022-11-25 15:33:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23557 conditions, 6071 events. 3224/6071 cut-off events. For 19342/19342 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 46122 event pairs, 1924 based on Foata normal form. 109/6180 useless extension candidates. Maximal degree in co-relation 22563. Up to 4967 conditions per place. [2022-11-25 15:33:10,958 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 206 selfloop transitions, 5 changer transitions 123/334 dead transitions. [2022-11-25 15:33:10,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 334 transitions, 4562 flow [2022-11-25 15:33:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:33:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 15:33:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1694 transitions. [2022-11-25 15:33:11,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351399948625739 [2022-11-25 15:33:11,049 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1694 transitions. [2022-11-25 15:33:11,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1694 transitions. [2022-11-25 15:33:11,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:11,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1694 transitions. [2022-11-25 15:33:11,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.6470588235294) internal successors, (1694), 17 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:11,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:11,057 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:11,057 INFO L175 Difference]: Start difference. First operand has 126 places, 210 transitions, 3013 flow. Second operand 17 states and 1694 transitions. [2022-11-25 15:33:11,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 334 transitions, 4562 flow [2022-11-25 15:33:11,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 334 transitions, 4468 flow, removed 47 selfloop flow, removed 0 redundant places. [2022-11-25 15:33:11,239 INFO L231 Difference]: Finished difference. Result has 154 places, 211 transitions, 3075 flow [2022-11-25 15:33:11,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3075, PETRI_PLACES=154, PETRI_TRANSITIONS=211} [2022-11-25 15:33:11,240 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 135 predicate places. [2022-11-25 15:33:11,240 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 211 transitions, 3075 flow [2022-11-25 15:33:11,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.62068965517241) internal successors, (2744), 29 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:11,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:11,241 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:11,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:11,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:33:11,442 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash -755556346, now seen corresponding path program 14 times [2022-11-25 15:33:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:11,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052021585] [2022-11-25 15:33:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:11,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052021585] [2022-11-25 15:33:12,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052021585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230679560] [2022-11-25 15:33:12,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:33:12,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:12,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:12,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:33:12,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:12,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:12,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 15:33:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:12,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 15:33:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:33:12,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:12,794 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 15:33:12,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-25 15:33:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:33:12,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230679560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:12,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:12,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2022-11-25 15:33:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698564576] [2022-11-25 15:33:12,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 15:33:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 15:33:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-11-25 15:33:13,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-25 15:33:13,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 211 transitions, 3075 flow. Second operand has 32 states, 32 states have (on average 91.875) internal successors, (2940), 32 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:13,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:13,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-25 15:33:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:17,897 INFO L130 PetriNetUnfolder]: 3804/6971 cut-off events. [2022-11-25 15:33:17,898 INFO L131 PetriNetUnfolder]: For 28377/28377 co-relation queries the response was YES. [2022-11-25 15:33:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27228 conditions, 6971 events. 3804/6971 cut-off events. For 28377/28377 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 51226 event pairs, 147 based on Foata normal form. 16/6987 useless extension candidates. Maximal degree in co-relation 27153. Up to 1505 conditions per place. [2022-11-25 15:33:17,963 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 217 selfloop transitions, 285 changer transitions 217/719 dead transitions. [2022-11-25 15:33:17,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 719 transitions, 6921 flow [2022-11-25 15:33:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 15:33:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-25 15:33:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6666 transitions. [2022-11-25 15:33:17,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4280760339070126 [2022-11-25 15:33:17,976 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6666 transitions. [2022-11-25 15:33:17,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6666 transitions. [2022-11-25 15:33:17,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:17,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6666 transitions. [2022-11-25 15:33:17,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 98.02941176470588) internal successors, (6666), 68 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 229.0) internal successors, (15801), 69 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,009 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 229.0) internal successors, (15801), 69 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,010 INFO L175 Difference]: Start difference. First operand has 154 places, 211 transitions, 3075 flow. Second operand 68 states and 6666 transitions. [2022-11-25 15:33:18,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 719 transitions, 6921 flow [2022-11-25 15:33:18,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 719 transitions, 6739 flow, removed 87 selfloop flow, removed 15 redundant places. [2022-11-25 15:33:18,209 INFO L231 Difference]: Finished difference. Result has 211 places, 302 transitions, 5137 flow [2022-11-25 15:33:18,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=5137, PETRI_PLACES=211, PETRI_TRANSITIONS=302} [2022-11-25 15:33:18,210 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 192 predicate places. [2022-11-25 15:33:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 302 transitions, 5137 flow [2022-11-25 15:33:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.875) internal successors, (2940), 32 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:18,211 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:18,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:18,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 15:33:18,418 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1218342540, now seen corresponding path program 15 times [2022-11-25 15:33:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298903343] [2022-11-25 15:33:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:19,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298903343] [2022-11-25 15:33:19,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298903343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792310027] [2022-11-25 15:33:19,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:33:19,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:19,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:19,332 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:19,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:33:19,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:33:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:19,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 15:33:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:19,796 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 15 treesize of output 11 [2022-11-25 15:33:19,859 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 [2022-11-25 15:33:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:33:20,026 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 21 treesize of output 23 [2022-11-25 15:33:20,445 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-25 15:33:20,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-25 15:33:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:20,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:21,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:21,329 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 60 treesize of output 48 [2022-11-25 15:33:21,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:21,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 103 [2022-11-25 15:33:21,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:21,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 61 [2022-11-25 15:33:21,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-11-25 15:33:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:21,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792310027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:21,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:21,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 37 [2022-11-25 15:33:21,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378427263] [2022-11-25 15:33:21,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:21,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:33:21,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:33:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 15:33:24,268 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 [0] [2022-11-25 15:33:27,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:33:28,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 229 [2022-11-25 15:33:28,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 302 transitions, 5137 flow. Second operand has 39 states, 39 states have (on average 78.58974358974359) internal successors, (3065), 39 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:28,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:28,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 229 [2022-11-25 15:33:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:33,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:33:36,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:33:38,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:33:41,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:33:46,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:33:47,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:33:51,629 INFO L130 PetriNetUnfolder]: 9461/17350 cut-off events. [2022-11-25 15:33:51,629 INFO L131 PetriNetUnfolder]: For 83663/83663 co-relation queries the response was YES. [2022-11-25 15:33:51,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73924 conditions, 17350 events. 9461/17350 cut-off events. For 83663/83663 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 148755 event pairs, 1202 based on Foata normal form. 2/17352 useless extension candidates. Maximal degree in co-relation 72249. Up to 3687 conditions per place. [2022-11-25 15:33:51,918 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 171 selfloop transitions, 310 changer transitions 615/1096 dead transitions. [2022-11-25 15:33:51,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1096 transitions, 16297 flow [2022-11-25 15:33:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 15:33:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 15:33:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4486 transitions. [2022-11-25 15:33:51,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3696135783142457 [2022-11-25 15:33:51,929 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4486 transitions. [2022-11-25 15:33:51,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4486 transitions. [2022-11-25 15:33:51,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:51,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4486 transitions. [2022-11-25 15:33:51,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 84.64150943396227) internal successors, (4486), 53 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:51,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:51,961 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:51,962 INFO L175 Difference]: Start difference. First operand has 211 places, 302 transitions, 5137 flow. Second operand 53 states and 4486 transitions. [2022-11-25 15:33:51,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1096 transitions, 16297 flow [2022-11-25 15:33:53,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1096 transitions, 14243 flow, removed 253 selfloop flow, removed 24 redundant places. [2022-11-25 15:33:53,231 INFO L231 Difference]: Finished difference. Result has 248 places, 418 transitions, 6907 flow [2022-11-25 15:33:53,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6907, PETRI_PLACES=248, PETRI_TRANSITIONS=418} [2022-11-25 15:33:53,232 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 229 predicate places. [2022-11-25 15:33:53,232 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 418 transitions, 6907 flow [2022-11-25 15:33:53,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.58974358974359) internal successors, (3065), 39 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:53,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:53,234 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:53,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:53,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 15:33:53,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:53,441 INFO L85 PathProgramCache]: Analyzing trace with hash 147225284, now seen corresponding path program 16 times [2022-11-25 15:33:53,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:53,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742257563] [2022-11-25 15:33:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:53,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:33:53,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:53,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742257563] [2022-11-25 15:33:53,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742257563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:53,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208735213] [2022-11-25 15:33:53,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:33:53,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:53,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:53,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:53,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 15:33:53,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:33:53,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:53,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:33:53,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:33:53,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:33:53,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208735213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:53,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:53,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-25 15:33:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964760249] [2022-11-25 15:33:53,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:53,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:33:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:33:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:33:53,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-25 15:33:53,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 418 transitions, 6907 flow. Second operand has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:53,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:53,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-25 15:33:53,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:57,890 INFO L130 PetriNetUnfolder]: 8656/15832 cut-off events. [2022-11-25 15:33:57,890 INFO L131 PetriNetUnfolder]: For 100694/100694 co-relation queries the response was YES. [2022-11-25 15:33:58,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66693 conditions, 15832 events. 8656/15832 cut-off events. For 100694/100694 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 133734 event pairs, 1210 based on Foata normal form. 24/15856 useless extension candidates. Maximal degree in co-relation 66590. Up to 4193 conditions per place. [2022-11-25 15:33:58,071 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 183 selfloop transitions, 507 changer transitions 0/690 dead transitions. [2022-11-25 15:33:58,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 690 transitions, 12995 flow [2022-11-25 15:33:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2022-11-25 15:33:58,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4890829694323144 [2022-11-25 15:33:58,074 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2022-11-25 15:33:58,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2022-11-25 15:33:58,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:58,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2022-11-25 15:33:58,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,078 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 229.0) internal successors, (1832), 8 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,078 INFO L175 Difference]: Start difference. First operand has 248 places, 418 transitions, 6907 flow. Second operand 7 states and 784 transitions. [2022-11-25 15:33:58,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 690 transitions, 12995 flow [2022-11-25 15:33:58,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 690 transitions, 12421 flow, removed 230 selfloop flow, removed 14 redundant places. [2022-11-25 15:33:58,713 INFO L231 Difference]: Finished difference. Result has 223 places, 649 transitions, 12017 flow [2022-11-25 15:33:58,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12017, PETRI_PLACES=223, PETRI_TRANSITIONS=649} [2022-11-25 15:33:58,714 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 204 predicate places. [2022-11-25 15:33:58,714 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 649 transitions, 12017 flow [2022-11-25 15:33:58,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:58,715 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:58,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:58,922 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -31577955, now seen corresponding path program 17 times [2022-11-25 15:33:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413745623] [2022-11-25 15:33:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:00,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:00,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413745623] [2022-11-25 15:34:00,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413745623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:00,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112682568] [2022-11-25 15:34:00,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:34:00,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:00,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:00,014 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:00,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 15:34:00,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 15:34:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 15:34:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:00,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 15:34:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:00,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:00,871 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 15:34:00,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-25 15:34:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:34:01,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112682568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:01,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:01,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 10] total 40 [2022-11-25 15:34:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738500884] [2022-11-25 15:34:01,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:01,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 15:34:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 15:34:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 15:34:02,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2022-11-25 15:34:02,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 649 transitions, 12017 flow. Second operand has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:02,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:02,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2022-11-25 15:34:02,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:17,258 INFO L130 PetriNetUnfolder]: 11424/20844 cut-off events. [2022-11-25 15:34:17,258 INFO L131 PetriNetUnfolder]: For 134720/134720 co-relation queries the response was YES. [2022-11-25 15:34:17,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93340 conditions, 20844 events. 11424/20844 cut-off events. For 134720/134720 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 182133 event pairs, 509 based on Foata normal form. 18/20862 useless extension candidates. Maximal degree in co-relation 93248. Up to 5903 conditions per place. [2022-11-25 15:34:17,478 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 395 selfloop transitions, 868 changer transitions 502/1765 dead transitions. [2022-11-25 15:34:17,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1765 transitions, 22001 flow [2022-11-25 15:34:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-25 15:34:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2022-11-25 15:34:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 13821 transitions. [2022-11-25 15:34:17,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4280405091517235 [2022-11-25 15:34:17,501 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 13821 transitions. [2022-11-25 15:34:17,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 13821 transitions. [2022-11-25 15:34:17,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:17,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 13821 transitions. [2022-11-25 15:34:17,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 98.02127659574468) internal successors, (13821), 141 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:17,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 229.0) internal successors, (32518), 142 states have internal predecessors, (32518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:17,564 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 229.0) internal successors, (32518), 142 states have internal predecessors, (32518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:17,564 INFO L175 Difference]: Start difference. First operand has 223 places, 649 transitions, 12017 flow. Second operand 141 states and 13821 transitions. [2022-11-25 15:34:17,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1765 transitions, 22001 flow [2022-11-25 15:34:18,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1765 transitions, 21101 flow, removed 450 selfloop flow, removed 0 redundant places. [2022-11-25 15:34:18,545 INFO L231 Difference]: Finished difference. Result has 382 places, 886 transitions, 18074 flow [2022-11-25 15:34:18,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=11453, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=18074, PETRI_PLACES=382, PETRI_TRANSITIONS=886} [2022-11-25 15:34:18,546 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 363 predicate places. [2022-11-25 15:34:18,546 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 886 transitions, 18074 flow [2022-11-25 15:34:18,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 91.5) internal successors, (3843), 42 states have internal predecessors, (3843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:18,547 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:18,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-25 15:34:18,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:18,758 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 756174589, now seen corresponding path program 18 times [2022-11-25 15:34:18,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105959695] [2022-11-25 15:34:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:19,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105959695] [2022-11-25 15:34:19,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105959695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223373486] [2022-11-25 15:34:19,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:34:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:19,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:19,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 15:34:20,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 15:34:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:20,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 15:34:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:21,222 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-25 15:34:21,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-25 15:34:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:34:21,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:21,621 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-11-25 15:34:21,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-25 15:34:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:34:22,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223373486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:22,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:22,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2022-11-25 15:34:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24647946] [2022-11-25 15:34:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:34:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:34:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:34:23,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 229 [2022-11-25 15:34:23,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 886 transitions, 18074 flow. Second operand has 43 states, 43 states have (on average 86.6046511627907) internal successors, (3724), 43 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:23,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:23,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 229 [2022-11-25 15:34:23,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:27,051 INFO L130 PetriNetUnfolder]: 35223/64317 cut-off events. [2022-11-25 15:35:27,051 INFO L131 PetriNetUnfolder]: For 515264/515264 co-relation queries the response was YES. [2022-11-25 15:35:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309554 conditions, 64317 events. 35223/64317 cut-off events. For 515264/515264 co-relation queries the response was YES. Maximal size of possible extension queue 3677. Compared 659126 event pairs, 5866 based on Foata normal form. 11/64328 useless extension candidates. Maximal degree in co-relation 303337. Up to 13368 conditions per place. [2022-11-25 15:35:27,926 INFO L137 encePairwiseOnDemand]: 222/229 looper letters, 661 selfloop transitions, 761 changer transitions 2470/3892 dead transitions. [2022-11-25 15:35:27,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 3892 transitions, 69193 flow [2022-11-25 15:35:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-11-25 15:35:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2022-11-25 15:35:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 16395 transitions. [2022-11-25 15:35:27,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40678344581183007 [2022-11-25 15:35:27,951 INFO L72 ComplementDD]: Start complementDD. Operand 176 states and 16395 transitions. [2022-11-25 15:35:27,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 176 states and 16395 transitions. [2022-11-25 15:35:27,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:27,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 176 states and 16395 transitions. [2022-11-25 15:35:27,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 177 states, 176 states have (on average 93.1534090909091) internal successors, (16395), 176 states have internal predecessors, (16395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:28,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 177 states, 177 states have (on average 229.0) internal successors, (40533), 177 states have internal predecessors, (40533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:28,022 INFO L81 ComplementDD]: Finished complementDD. Result has 177 states, 177 states have (on average 229.0) internal successors, (40533), 177 states have internal predecessors, (40533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:28,023 INFO L175 Difference]: Start difference. First operand has 382 places, 886 transitions, 18074 flow. Second operand 176 states and 16395 transitions. [2022-11-25 15:35:28,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 3892 transitions, 69193 flow [2022-11-25 15:35:41,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 3892 transitions, 61757 flow, removed 751 selfloop flow, removed 33 redundant places. [2022-11-25 15:35:41,782 INFO L231 Difference]: Finished difference. Result has 560 places, 1071 transitions, 22080 flow [2022-11-25 15:35:41,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=15750, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=176, PETRI_FLOW=22080, PETRI_PLACES=560, PETRI_TRANSITIONS=1071} [2022-11-25 15:35:41,783 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 541 predicate places. [2022-11-25 15:35:41,783 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1071 transitions, 22080 flow [2022-11-25 15:35:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 86.6046511627907) internal successors, (3724), 43 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:41,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:41,785 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:41,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:41,991 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 180715615, now seen corresponding path program 19 times [2022-11-25 15:35:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410804195] [2022-11-25 15:35:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410804195] [2022-11-25 15:35:43,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410804195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206089406] [2022-11-25 15:35:43,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:35:43,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:43,202 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:43,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 15:35:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 15:35:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:44,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:35:44,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 15:35:44,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 15:35:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:44,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:44,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:44,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-11-25 15:35:44,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-25 15:35:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:45,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206089406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:45,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:45,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-11-25 15:35:45,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276201293] [2022-11-25 15:35:45,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-25 15:35:45,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-25 15:35:45,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2654, Unknown=10, NotChecked=0, Total=2862 [2022-11-25 15:35:49,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 229 [2022-11-25 15:35:49,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1071 transitions, 22080 flow. Second operand has 54 states, 54 states have (on average 83.24074074074075) internal successors, (4495), 54 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:49,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:49,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 229 [2022-11-25 15:35:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:05,913 INFO L130 PetriNetUnfolder]: 13658/24985 cut-off events. [2022-11-25 15:36:05,913 INFO L131 PetriNetUnfolder]: For 519082/519082 co-relation queries the response was YES. [2022-11-25 15:36:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144023 conditions, 24985 events. 13658/24985 cut-off events. For 519082/519082 co-relation queries the response was YES. Maximal size of possible extension queue 1447. Compared 223704 event pairs, 615 based on Foata normal form. 12/24997 useless extension candidates. Maximal degree in co-relation 143476. Up to 5184 conditions per place. [2022-11-25 15:36:06,437 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 201 selfloop transitions, 1037 changer transitions 173/1411 dead transitions. [2022-11-25 15:36:06,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1411 transitions, 27233 flow [2022-11-25 15:36:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 15:36:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-25 15:36:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5004 transitions. [2022-11-25 15:36:06,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39020586400499063 [2022-11-25 15:36:06,444 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5004 transitions. [2022-11-25 15:36:06,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5004 transitions. [2022-11-25 15:36:06,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:06,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5004 transitions. [2022-11-25 15:36:06,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 89.35714285714286) internal successors, (5004), 56 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:06,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 229.0) internal successors, (13053), 57 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:06,475 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 229.0) internal successors, (13053), 57 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:06,476 INFO L175 Difference]: Start difference. First operand has 560 places, 1071 transitions, 22080 flow. Second operand 56 states and 5004 transitions. [2022-11-25 15:36:06,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1411 transitions, 27233 flow [2022-11-25 15:36:17,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1411 transitions, 25101 flow, removed 884 selfloop flow, removed 53 redundant places. [2022-11-25 15:36:17,938 INFO L231 Difference]: Finished difference. Result has 506 places, 1086 transitions, 22462 flow [2022-11-25 15:36:17,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=20041, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=22462, PETRI_PLACES=506, PETRI_TRANSITIONS=1086} [2022-11-25 15:36:17,940 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 487 predicate places. [2022-11-25 15:36:17,940 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1086 transitions, 22462 flow [2022-11-25 15:36:17,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 83.24074074074075) internal successors, (4495), 54 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:17,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:17,941 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:17,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 15:36:18,142 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:18,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1026224840, now seen corresponding path program 20 times [2022-11-25 15:36:18,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:18,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381831949] [2022-11-25 15:36:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:18,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:36:18,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381831949] [2022-11-25 15:36:18,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381831949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37629624] [2022-11-25 15:36:18,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:18,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:18,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:18,684 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:18,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 15:36:18,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 15:36:18,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:36:19,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:36:20,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37629624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:20,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:20,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2022-11-25 15:36:20,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744571034] [2022-11-25 15:36:20,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 15:36:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 15:36:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1308, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 15:36:20,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2022-11-25 15:36:20,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1086 transitions, 22462 flow. Second operand has 42 states, 42 states have (on average 94.52380952380952) internal successors, (3970), 42 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:20,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:20,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2022-11-25 15:36:20,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:32,286 INFO L130 PetriNetUnfolder]: 13044/23870 cut-off events. [2022-11-25 15:36:32,287 INFO L131 PetriNetUnfolder]: For 437548/437548 co-relation queries the response was YES. [2022-11-25 15:36:32,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138614 conditions, 23870 events. 13044/23870 cut-off events. For 437548/437548 co-relation queries the response was YES. Maximal size of possible extension queue 1346. Compared 219342 event pairs, 8865 based on Foata normal form. 26/23896 useless extension candidates. Maximal degree in co-relation 138462. Up to 23513 conditions per place. [2022-11-25 15:36:32,739 INFO L137 encePairwiseOnDemand]: 224/229 looper letters, 1018 selfloop transitions, 7 changer transitions 88/1113 dead transitions. [2022-11-25 15:36:32,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1113 transitions, 24314 flow [2022-11-25 15:36:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:36:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 15:36:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1880 transitions. [2022-11-25 15:36:32,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320845782578718 [2022-11-25 15:36:32,743 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1880 transitions. [2022-11-25 15:36:32,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1880 transitions. [2022-11-25 15:36:32,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:32,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1880 transitions. [2022-11-25 15:36:32,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.94736842105263) internal successors, (1880), 19 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,752 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,752 INFO L175 Difference]: Start difference. First operand has 506 places, 1086 transitions, 22462 flow. Second operand 19 states and 1880 transitions. [2022-11-25 15:36:32,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1113 transitions, 24314 flow [2022-11-25 15:36:44,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1113 transitions, 23485 flow, removed 146 selfloop flow, removed 45 redundant places. [2022-11-25 15:36:44,885 INFO L231 Difference]: Finished difference. Result has 457 places, 1025 transitions, 20947 flow [2022-11-25 15:36:44,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=21080, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20947, PETRI_PLACES=457, PETRI_TRANSITIONS=1025} [2022-11-25 15:36:44,886 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 438 predicate places. [2022-11-25 15:36:44,887 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1025 transitions, 20947 flow [2022-11-25 15:36:44,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 94.52380952380952) internal successors, (3970), 42 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:44,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:44,888 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:44,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:45,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:36:45,095 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1832408669, now seen corresponding path program 21 times [2022-11-25 15:36:45,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:45,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546252948] [2022-11-25 15:36:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:36:45,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546252948] [2022-11-25 15:36:45,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546252948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281554099] [2022-11-25 15:36:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:36:45,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:45,332 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:45,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1dd7c02d-f3b5-4c03-93f2-2b8a89045fc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 15:36:45,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:36:45,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:36:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:36:45,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:36:45,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281554099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:45,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:45,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-11-25 15:36:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556599891] [2022-11-25 15:36:45,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:45,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:36:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:36:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:36:45,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2022-11-25 15:36:45,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1025 transitions, 20947 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:45,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:45,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2022-11-25 15:36:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand