./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c --- 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-5e519f3 [2022-11-03 03:58:47,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:58:47,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:58:47,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:58:47,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:58:47,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:58:47,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:58:47,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:58:47,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:58:47,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:58:47,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:58:47,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:58:47,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:58:47,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:58:47,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:58:47,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:58:47,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:58:47,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:58:47,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:58:47,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:58:47,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:58:47,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:58:47,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:58:47,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:58:47,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:58:47,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:58:47,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:58:47,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:58:47,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:58:47,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:58:47,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:58:47,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:58:47,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:58:47,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:58:47,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:58:47,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:58:47,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:58:47,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:58:47,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:58:47,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:58:47,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:58:47,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:58:47,791 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:58:47,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:58:47,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:58:47,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:58:47,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:58:47,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:58:47,795 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:58:47,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:58:47,796 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:58:47,796 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:58:47,798 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:58:47,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:58:47,799 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:58:47,799 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:58:47,799 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:58:47,800 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:58:47,800 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:58:47,801 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:58:47,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:58:47,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:58:47,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:58:47,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:58:47,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:58:47,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:58:47,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:58:47,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:58:47,804 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:58:47,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:58:47,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:58:47,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:58:47,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:58:47,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:58:47,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:58:47,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:58:47,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:58:47,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:58:47,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:58:47,808 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:58:47,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:58:47,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:58:47,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:58:47,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c [2022-11-03 03:58:48,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:58:48,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:58:48,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:58:48,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:58:48,317 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:58:48,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2022-11-03 03:58:48,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/data/0a8b3640d/395e4eeabcf34f7cb6c87f00f53322fc/FLAG6e30c9041 [2022-11-03 03:58:49,209 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:58:49,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2022-11-03 03:58:49,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/data/0a8b3640d/395e4eeabcf34f7cb6c87f00f53322fc/FLAG6e30c9041 [2022-11-03 03:58:49,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/data/0a8b3640d/395e4eeabcf34f7cb6c87f00f53322fc [2022-11-03 03:58:49,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:58:49,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:58:49,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:58:49,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:58:49,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:58:49,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:58:49" (1/1) ... [2022-11-03 03:58:49,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7183c9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:49, skipping insertion in model container [2022-11-03 03:58:49,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:58:49" (1/1) ... [2022-11-03 03:58:49,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:58:49,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:58:49,778 WARN L230 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_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2022-11-03 03:58:50,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:58:50,189 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:58:50,213 WARN L230 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_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2022-11-03 03:58:50,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:58:50,358 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:58:50,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50 WrapperNode [2022-11-03 03:58:50,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:58:50,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:58:50,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:58:50,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:58:50,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,462 INFO L138 Inliner]: procedures = 88, calls = 338, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 798 [2022-11-03 03:58:50,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:58:50,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:58:50,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:58:50,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:58:50,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:58:50,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:58:50,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:58:50,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:58:50,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (1/1) ... [2022-11-03 03:58:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:58:50,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:50,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:58:50,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:58:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:58:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 03:58:50,705 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 03:58:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:58:50,705 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:58:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:58:50,706 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:58:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:58:50,706 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:58:50,706 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 03:58:50,706 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 03:58:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:58:50,707 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:58:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:58:50,707 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:58:50,707 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:58:50,707 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:58:50,708 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:58:50,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:58:50,708 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:58:50,708 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:58:50,708 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:58:50,709 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:58:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:58:50,709 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:58:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-03 03:58:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-03 03:58:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:58:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:58:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-03 03:58:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-03 03:58:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:58:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:58:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:58:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:58:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:58:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:58:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:58:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:58:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:58:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:58:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:58:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:58:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:58:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:58:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:58:50,719 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:58:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:58:50,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:58:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:58:50,722 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:58:50,987 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:58:50,991 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:58:52,564 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:58:53,704 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:58:53,704 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:58:53,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:58:53 BoogieIcfgContainer [2022-11-03 03:58:53,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:58:53,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:58:53,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:58:53,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:58:53,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:58:49" (1/3) ... [2022-11-03 03:58:53,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25802b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:58:53, skipping insertion in model container [2022-11-03 03:58:53,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:50" (2/3) ... [2022-11-03 03:58:53,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25802b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:58:53, skipping insertion in model container [2022-11-03 03:58:53,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:58:53" (3/3) ... [2022-11-03 03:58:53,725 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2022-11-03 03:58:53,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:58:53,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:58:53,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:58:53,872 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=FINITE_AUTOMATA, 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;@46b8dc65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:58:53,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:58:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 03:58:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:58:53,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:53,920 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:53,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1922019369, now seen corresponding path program 1 times [2022-11-03 03:58:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:53,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317833665] [2022-11-03 03:58:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:55,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:55,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317833665] [2022-11-03 03:58:55,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317833665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:55,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088510991] [2022-11-03 03:58:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:55,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:55,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:55,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:58:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:58:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:55,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:55,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088510991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:55,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:55,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:58:55,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941097973] [2022-11-03 03:58:55,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:55,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:55,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:55,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:58:55,743 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:58:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:56,242 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2022-11-03 03:58:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-03 03:58:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:56,268 INFO L225 Difference]: With dead ends: 1074 [2022-11-03 03:58:56,269 INFO L226 Difference]: Without dead ends: 693 [2022-11-03 03:58:56,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:58:56,285 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 494 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:56,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1549 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-03 03:58:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2022-11-03 03:58:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2022-11-03 03:58:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2022-11-03 03:58:56,477 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2022-11-03 03:58:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:56,478 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2022-11-03 03:58:56,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:58:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2022-11-03 03:58:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:58:56,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:56,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:56,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:56,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:56,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash -210879891, now seen corresponding path program 1 times [2022-11-03 03:58:56,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840457987] [2022-11-03 03:58:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:57,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:57,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840457987] [2022-11-03 03:58:57,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840457987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256338020] [2022-11-03 03:58:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:57,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:57,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:57,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:58:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:58:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:58,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256338020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:58,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:58,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:58:58,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564368588] [2022-11-03 03:58:58,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:58,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:58,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:58:58,087 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:58:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:58,349 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2022-11-03 03:58:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-03 03:58:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:58,361 INFO L225 Difference]: With dead ends: 1666 [2022-11-03 03:58:58,361 INFO L226 Difference]: Without dead ends: 997 [2022-11-03 03:58:58,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:58:58,368 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 550 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:58,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1115 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-03 03:58:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2022-11-03 03:58:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-03 03:58:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2022-11-03 03:58:58,476 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2022-11-03 03:58:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:58,477 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2022-11-03 03:58:58,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:58:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2022-11-03 03:58:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:58:58,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:58,484 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:58,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:58:58,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash -463813269, now seen corresponding path program 1 times [2022-11-03 03:58:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:58,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164748603] [2022-11-03 03:58:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:59,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:59,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164748603] [2022-11-03 03:58:59,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164748603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638089482] [2022-11-03 03:58:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:59,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:59,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:59,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:59,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:58:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:58:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:59,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:59,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638089482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:59,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:59,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 03:58:59,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241711408] [2022-11-03 03:58:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:59,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:58:59,870 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:59:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:00,360 INFO L93 Difference]: Finished difference Result 2778 states and 4510 transitions. [2022-11-03 03:59:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-03 03:59:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:00,385 INFO L225 Difference]: With dead ends: 2778 [2022-11-03 03:59:00,386 INFO L226 Difference]: Without dead ends: 1817 [2022-11-03 03:59:00,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:00,404 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 481 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:00,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1173 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:59:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-03 03:59:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1795. [2022-11-03 03:59:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1216 states have (on average 1.544407894736842) internal successors, (1878), 1306 states have internal predecessors, (1878), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2022-11-03 03:59:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2849 transitions. [2022-11-03 03:59:00,648 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2849 transitions. Word has length 64 [2022-11-03 03:59:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:00,649 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2849 transitions. [2022-11-03 03:59:00,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:59:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2849 transitions. [2022-11-03 03:59:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 03:59:00,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:00,668 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:00,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:00,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1317339515, now seen corresponding path program 1 times [2022-11-03 03:59:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:00,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708084101] [2022-11-03 03:59:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:00,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:01,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708084101] [2022-11-03 03:59:01,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708084101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907408112] [2022-11-03 03:59:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:01,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:01,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:01,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:59:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:01,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:59:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:01,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:01,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907408112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:01,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:01,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-03 03:59:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432473784] [2022-11-03 03:59:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:59:01,861 INFO L87 Difference]: Start difference. First operand 1795 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:59:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:02,381 INFO L93 Difference]: Finished difference Result 3490 states and 5650 transitions. [2022-11-03 03:59:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-03 03:59:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:02,410 INFO L225 Difference]: With dead ends: 3490 [2022-11-03 03:59:02,410 INFO L226 Difference]: Without dead ends: 2337 [2022-11-03 03:59:02,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:59:02,425 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 139 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:02,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1759 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:59:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2022-11-03 03:59:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2071. [2022-11-03 03:59:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1358 states have (on average 1.5316642120765833) internal successors, (2080), 1487 states have internal predecessors, (2080), 599 states have call successors, (599), 112 states have call predecessors, (599), 113 states have return successors, (646), 582 states have call predecessors, (646), 595 states have call successors, (646) [2022-11-03 03:59:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 3325 transitions. [2022-11-03 03:59:02,674 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 3325 transitions. Word has length 68 [2022-11-03 03:59:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:02,675 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 3325 transitions. [2022-11-03 03:59:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:59:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 3325 transitions. [2022-11-03 03:59:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:59:02,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:02,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:02,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:02,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:02,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1485936470, now seen corresponding path program 1 times [2022-11-03 03:59:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641374194] [2022-11-03 03:59:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:59:03,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:03,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641374194] [2022-11-03 03:59:03,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641374194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:03,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031619043] [2022-11-03 03:59:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:03,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:03,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:03,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:59:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:03,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:59:04,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:04,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031619043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:04,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:04,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 03:59:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958946825] [2022-11-03 03:59:04,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:04,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:04,203 INFO L87 Difference]: Start difference. First operand 2071 states and 3325 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:59:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:05,220 INFO L93 Difference]: Finished difference Result 3726 states and 5957 transitions. [2022-11-03 03:59:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-03 03:59:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:05,243 INFO L225 Difference]: With dead ends: 3726 [2022-11-03 03:59:05,243 INFO L226 Difference]: Without dead ends: 2306 [2022-11-03 03:59:05,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:59:05,262 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 469 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:05,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2325 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:59:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-11-03 03:59:05,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2287. [2022-11-03 03:59:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.5163185378590078) internal successors, (2323), 1664 states have internal predecessors, (2323), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2022-11-03 03:59:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3625 transitions. [2022-11-03 03:59:05,528 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3625 transitions. Word has length 72 [2022-11-03 03:59:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:05,529 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3625 transitions. [2022-11-03 03:59:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:59:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3625 transitions. [2022-11-03 03:59:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 03:59:05,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:05,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:05,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:05,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:05,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1163638822, now seen corresponding path program 1 times [2022-11-03 03:59:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640816365] [2022-11-03 03:59:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:59:06,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640816365] [2022-11-03 03:59:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640816365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369545632] [2022-11-03 03:59:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:06,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:06,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:06,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:59:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:59:06,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:59:06,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:06,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369545632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:06,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:06,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:59:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866814103] [2022-11-03 03:59:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:06,819 INFO L87 Difference]: Start difference. First operand 2287 states and 3625 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:59:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:07,259 INFO L93 Difference]: Finished difference Result 4310 states and 6908 transitions. [2022-11-03 03:59:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-03 03:59:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:07,278 INFO L225 Difference]: With dead ends: 4310 [2022-11-03 03:59:07,278 INFO L226 Difference]: Without dead ends: 2287 [2022-11-03 03:59:07,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:07,293 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 273 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:07,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1552 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-03 03:59:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2287. [2022-11-03 03:59:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.481070496083551) internal successors, (2269), 1664 states have internal predecessors, (2269), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2022-11-03 03:59:07,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3571 transitions. [2022-11-03 03:59:07,488 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3571 transitions. Word has length 73 [2022-11-03 03:59:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:07,489 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3571 transitions. [2022-11-03 03:59:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:59:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3571 transitions. [2022-11-03 03:59:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:59:07,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:07,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:07,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:07,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:59:07,702 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash -84286950, now seen corresponding path program 1 times [2022-11-03 03:59:07,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:07,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382334955] [2022-11-03 03:59:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:59:08,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:08,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382334955] [2022-11-03 03:59:08,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382334955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:08,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802136567] [2022-11-03 03:59:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:08,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:08,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:08,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:59:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:59:08,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:59:09,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:59:09,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802136567] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:09,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:59:09,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-03 03:59:09,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831140458] [2022-11-03 03:59:09,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:09,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:59:09,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:09,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:59:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:59:09,424 INFO L87 Difference]: Start difference. First operand 2287 states and 3571 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:59:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:14,580 INFO L93 Difference]: Finished difference Result 5633 states and 9097 transitions. [2022-11-03 03:59:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:59:14,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-03 03:59:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:14,617 INFO L225 Difference]: With dead ends: 5633 [2022-11-03 03:59:14,617 INFO L226 Difference]: Without dead ends: 4214 [2022-11-03 03:59:14,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:59:14,636 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 2912 mSDsluCounter, 2312 mSDsCounter, 0 mSdLazyCounter, 2507 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2992 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 3913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 2507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:14,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2992 Valid, 2871 Invalid, 3913 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1406 Valid, 2507 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 03:59:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2022-11-03 03:59:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 3559. [2022-11-03 03:59:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2022-11-03 03:59:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2022-11-03 03:59:15,252 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2022-11-03 03:59:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:15,253 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2022-11-03 03:59:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:59:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2022-11-03 03:59:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 03:59:15,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:15,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:15,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:15,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:15,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:15,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:15,462 INFO L85 PathProgramCache]: Analyzing trace with hash -874265375, now seen corresponding path program 1 times [2022-11-03 03:59:15,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:15,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406556142] [2022-11-03 03:59:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:15,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:59:15,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:15,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406556142] [2022-11-03 03:59:15,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406556142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:15,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867264599] [2022-11-03 03:59:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:15,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:15,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:15,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:59:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:59:16,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:16,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867264599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:16,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:16,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:59:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427232520] [2022-11-03 03:59:16,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:16,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:16,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:16,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:16,336 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:59:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:17,397 INFO L93 Difference]: Finished difference Result 7442 states and 11785 transitions. [2022-11-03 03:59:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-11-03 03:59:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:17,429 INFO L225 Difference]: With dead ends: 7442 [2022-11-03 03:59:17,429 INFO L226 Difference]: Without dead ends: 3895 [2022-11-03 03:59:17,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:17,455 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 586 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:17,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1922 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:59:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2022-11-03 03:59:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3513. [2022-11-03 03:59:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2483 states have (on average 1.4800644381796215) internal successors, (3675), 2630 states have internal predecessors, (3675), 809 states have call successors, (809), 204 states have call predecessors, (809), 220 states have return successors, (1073), 774 states have call predecessors, (1073), 804 states have call successors, (1073) [2022-11-03 03:59:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5557 transitions. [2022-11-03 03:59:17,909 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5557 transitions. Word has length 76 [2022-11-03 03:59:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:17,909 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5557 transitions. [2022-11-03 03:59:17,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 03:59:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5557 transitions. [2022-11-03 03:59:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:59:17,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:17,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:17,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:18,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:59:18,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1558675849, now seen corresponding path program 1 times [2022-11-03 03:59:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:18,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093933573] [2022-11-03 03:59:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:59:18,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093933573] [2022-11-03 03:59:18,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093933573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558170934] [2022-11-03 03:59:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:18,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:18,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:59:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:59:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:59:18,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:18,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558170934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:18,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:18,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:59:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817760447] [2022-11-03 03:59:18,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:59:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:59:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:18,901 INFO L87 Difference]: Start difference. First operand 3513 states and 5557 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:59:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:19,456 INFO L93 Difference]: Finished difference Result 7855 states and 12548 transitions. [2022-11-03 03:59:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-03 03:59:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:19,493 INFO L225 Difference]: With dead ends: 7855 [2022-11-03 03:59:19,493 INFO L226 Difference]: Without dead ends: 4354 [2022-11-03 03:59:19,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:19,518 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 528 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:19,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-03 03:59:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3468. [2022-11-03 03:59:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2598 states have internal predecessors, (3620), 800 states have call successors, (800), 201 states have call predecessors, (800), 214 states have return successors, (1033), 764 states have call predecessors, (1033), 795 states have call successors, (1033) [2022-11-03 03:59:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5453 transitions. [2022-11-03 03:59:19,838 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5453 transitions. Word has length 75 [2022-11-03 03:59:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:19,839 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5453 transitions. [2022-11-03 03:59:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 03:59:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5453 transitions. [2022-11-03 03:59:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 03:59:19,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:19,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:19,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:20,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:20,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1607611056, now seen corresponding path program 1 times [2022-11-03 03:59:20,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:20,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167609894] [2022-11-03 03:59:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:59:20,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167609894] [2022-11-03 03:59:20,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167609894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13422249] [2022-11-03 03:59:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:20,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:20,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:20,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:59:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:59:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:59:21,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:21,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13422249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:21,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:21,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 03:59:21,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517371020] [2022-11-03 03:59:21,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:21,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:21,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:21,263 INFO L87 Difference]: Start difference. First operand 3468 states and 5453 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:59:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:22,276 INFO L93 Difference]: Finished difference Result 6364 states and 10040 transitions. [2022-11-03 03:59:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:59:22,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-03 03:59:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:22,309 INFO L225 Difference]: With dead ends: 6364 [2022-11-03 03:59:22,309 INFO L226 Difference]: Without dead ends: 3489 [2022-11-03 03:59:22,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:59:22,328 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 414 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:22,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2557 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:59:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-03 03:59:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3472. [2022-11-03 03:59:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2602 states have internal predecessors, (3620), 804 states have call successors, (804), 201 states have call predecessors, (804), 214 states have return successors, (1037), 764 states have call predecessors, (1037), 799 states have call successors, (1037) [2022-11-03 03:59:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 5461 transitions. [2022-11-03 03:59:22,724 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 5461 transitions. Word has length 79 [2022-11-03 03:59:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:22,724 INFO L495 AbstractCegarLoop]: Abstraction has 3472 states and 5461 transitions. [2022-11-03 03:59:22,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 03:59:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 5461 transitions. [2022-11-03 03:59:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:59:22,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:22,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:22,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:22,946 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1380506028, now seen corresponding path program 1 times [2022-11-03 03:59:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629579739] [2022-11-03 03:59:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:22,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:59:23,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629579739] [2022-11-03 03:59:23,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629579739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119204879] [2022-11-03 03:59:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:23,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:23,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:23,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:59:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:59:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:59:23,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119204879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:23,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:23,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 03:59:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392216515] [2022-11-03 03:59:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:23,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:23,821 INFO L87 Difference]: Start difference. First operand 3472 states and 5461 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:59:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:24,262 INFO L93 Difference]: Finished difference Result 6681 states and 10752 transitions. [2022-11-03 03:59:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-11-03 03:59:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:24,302 INFO L225 Difference]: With dead ends: 6681 [2022-11-03 03:59:24,302 INFO L226 Difference]: Without dead ends: 3663 [2022-11-03 03:59:24,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:24,324 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 13 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:24,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2224 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2022-11-03 03:59:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3546. [2022-11-03 03:59:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2503 states have (on average 1.4662405113863364) internal successors, (3670), 2661 states have internal predecessors, (3670), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-03 03:59:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5637 transitions. [2022-11-03 03:59:24,664 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5637 transitions. Word has length 99 [2022-11-03 03:59:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:24,665 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 5637 transitions. [2022-11-03 03:59:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:59:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5637 transitions. [2022-11-03 03:59:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 03:59:24,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:24,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:24,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:59:24,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash 509025896, now seen corresponding path program 1 times [2022-11-03 03:59:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:24,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289388295] [2022-11-03 03:59:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:59:25,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:25,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289388295] [2022-11-03 03:59:25,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289388295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:25,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3478241] [2022-11-03 03:59:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:25,226 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:25,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:59:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:25,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:59:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:59:25,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:25,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3478241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:25,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:25,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-03 03:59:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505360520] [2022-11-03 03:59:25,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:25,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:59:25,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:59:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:59:25,889 INFO L87 Difference]: Start difference. First operand 3546 states and 5637 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:59:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:30,243 INFO L93 Difference]: Finished difference Result 7879 states and 12725 transitions. [2022-11-03 03:59:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:59:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-03 03:59:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:30,283 INFO L225 Difference]: With dead ends: 7879 [2022-11-03 03:59:30,283 INFO L226 Difference]: Without dead ends: 4229 [2022-11-03 03:59:30,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:59:30,309 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 1605 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 3479 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1638 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 4561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 3479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:30,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1638 Valid, 1795 Invalid, 4561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1082 Valid, 3479 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 03:59:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-03 03:59:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3541. [2022-11-03 03:59:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2498 states have (on average 1.466773418734988) internal successors, (3664), 2656 states have internal predecessors, (3664), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-03 03:59:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5631 transitions. [2022-11-03 03:59:30,793 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5631 transitions. Word has length 117 [2022-11-03 03:59:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:30,794 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5631 transitions. [2022-11-03 03:59:30,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-03 03:59:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5631 transitions. [2022-11-03 03:59:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 03:59:30,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:30,818 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:30,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:59:31,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 501530342, now seen corresponding path program 1 times [2022-11-03 03:59:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550141446] [2022-11-03 03:59:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:31,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:59:31,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550141446] [2022-11-03 03:59:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550141446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690500786] [2022-11-03 03:59:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:31,476 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:31,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:59:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:59:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:59:31,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690500786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:31,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:31,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 03:59:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973253315] [2022-11-03 03:59:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:59:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:59:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:31,998 INFO L87 Difference]: Start difference. First operand 3541 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 03:59:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:32,624 INFO L93 Difference]: Finished difference Result 8268 states and 13378 transitions. [2022-11-03 03:59:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:32,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-03 03:59:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:32,663 INFO L225 Difference]: With dead ends: 8268 [2022-11-03 03:59:32,663 INFO L226 Difference]: Without dead ends: 4739 [2022-11-03 03:59:32,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:59:32,685 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 466 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:32,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1315 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-11-03 03:59:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4671. [2022-11-03 03:59:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3305 states have (on average 1.4686838124054462) internal successors, (4854), 3519 states have internal predecessors, (4854), 1055 states have call successors, (1055), 263 states have call predecessors, (1055), 310 states have return successors, (1504), 1020 states have call predecessors, (1504), 1050 states have call successors, (1504) [2022-11-03 03:59:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 7413 transitions. [2022-11-03 03:59:33,116 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 7413 transitions. Word has length 118 [2022-11-03 03:59:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:33,116 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 7413 transitions. [2022-11-03 03:59:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 03:59:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 7413 transitions. [2022-11-03 03:59:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:59:33,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:33,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:33,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:33,354 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2077296492, now seen corresponding path program 1 times [2022-11-03 03:59:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:33,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978903344] [2022-11-03 03:59:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:59:33,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:33,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978903344] [2022-11-03 03:59:33,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978903344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:33,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639577279] [2022-11-03 03:59:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:33,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:33,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:33,832 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:33,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:59:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:59:34,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:34,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639577279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:34,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:34,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-03 03:59:34,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922731470] [2022-11-03 03:59:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:34,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:59:34,359 INFO L87 Difference]: Start difference. First operand 4671 states and 7413 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-03 03:59:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:35,920 INFO L93 Difference]: Finished difference Result 9373 states and 15236 transitions. [2022-11-03 03:59:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-03 03:59:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:35,963 INFO L225 Difference]: With dead ends: 9373 [2022-11-03 03:59:35,964 INFO L226 Difference]: Without dead ends: 5565 [2022-11-03 03:59:35,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:59:36,056 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 681 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:36,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1181 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:59:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2022-11-03 03:59:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5449. [2022-11-03 03:59:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5449 states, 3753 states have (on average 1.4628297362110312) internal successors, (5490), 4013 states have internal predecessors, (5490), 1318 states have call successors, (1318), 339 states have call predecessors, (1318), 377 states have return successors, (1814), 1276 states have call predecessors, (1814), 1311 states have call successors, (1814) [2022-11-03 03:59:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 8622 transitions. [2022-11-03 03:59:36,581 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 8622 transitions. Word has length 123 [2022-11-03 03:59:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:36,585 INFO L495 AbstractCegarLoop]: Abstraction has 5449 states and 8622 transitions. [2022-11-03 03:59:36,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-03 03:59:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 8622 transitions. [2022-11-03 03:59:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:59:36,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:36,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:36,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:36,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:59:36,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1745899087, now seen corresponding path program 1 times [2022-11-03 03:59:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653660004] [2022-11-03 03:59:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:59:37,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653660004] [2022-11-03 03:59:37,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653660004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808720264] [2022-11-03 03:59:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:37,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:37,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:37,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:59:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:59:37,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:59:37,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:37,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808720264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:37,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:37,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-03 03:59:37,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377484192] [2022-11-03 03:59:37,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:37,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:59:37,845 INFO L87 Difference]: Start difference. First operand 5449 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-03 03:59:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:39,869 INFO L93 Difference]: Finished difference Result 13085 states and 21137 transitions. [2022-11-03 03:59:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:39,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-03 03:59:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:39,927 INFO L225 Difference]: With dead ends: 13085 [2022-11-03 03:59:39,927 INFO L226 Difference]: Without dead ends: 8477 [2022-11-03 03:59:39,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:59:39,958 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 555 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:39,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1628 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:59:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-11-03 03:59:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 8459. [2022-11-03 03:59:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8459 states, 5713 states have (on average 1.465604761071241) internal successors, (8373), 6147 states have internal predecessors, (8373), 2160 states have call successors, (2160), 545 states have call predecessors, (2160), 585 states have return successors, (2844), 2090 states have call predecessors, (2844), 2149 states have call successors, (2844) [2022-11-03 03:59:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 13377 transitions. [2022-11-03 03:59:40,811 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 13377 transitions. Word has length 124 [2022-11-03 03:59:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:40,812 INFO L495 AbstractCegarLoop]: Abstraction has 8459 states and 13377 transitions. [2022-11-03 03:59:40,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-03 03:59:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 13377 transitions. [2022-11-03 03:59:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 03:59:40,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:40,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:40,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:59:41,055 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1249849006, now seen corresponding path program 1 times [2022-11-03 03:59:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:41,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613856490] [2022-11-03 03:59:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:41,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:59:41,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613856490] [2022-11-03 03:59:41,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613856490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83367782] [2022-11-03 03:59:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:41,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:41,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:41,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:41,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:59:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:59:42,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:59:42,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:59:42,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83367782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:42,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:59:42,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-03 03:59:42,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394656216] [2022-11-03 03:59:42,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:42,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:59:42,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:59:42,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:59:42,184 INFO L87 Difference]: Start difference. First operand 8459 states and 13377 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 03:59:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:44,415 INFO L93 Difference]: Finished difference Result 21090 states and 33776 transitions. [2022-11-03 03:59:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:59:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-03 03:59:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:44,534 INFO L225 Difference]: With dead ends: 21090 [2022-11-03 03:59:44,535 INFO L226 Difference]: Without dead ends: 13494 [2022-11-03 03:59:44,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:59:44,606 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 660 mSDsluCounter, 3909 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:44,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 4383 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:59:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-03 03:59:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 12003. [2022-11-03 03:59:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12003 states, 8049 states have (on average 1.4678842092185365) internal successors, (11815), 8678 states have internal predecessors, (11815), 3141 states have call successors, (3141), 759 states have call predecessors, (3141), 812 states have return successors, (4275), 3057 states have call predecessors, (4275), 3124 states have call successors, (4275) [2022-11-03 03:59:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12003 states to 12003 states and 19231 transitions. [2022-11-03 03:59:46,025 INFO L78 Accepts]: Start accepts. Automaton has 12003 states and 19231 transitions. Word has length 125 [2022-11-03 03:59:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:46,025 INFO L495 AbstractCegarLoop]: Abstraction has 12003 states and 19231 transitions. [2022-11-03 03:59:46,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 03:59:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12003 states and 19231 transitions. [2022-11-03 03:59:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:59:46,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:46,043 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:46,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 03:59:46,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:59:46,270 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash 406811950, now seen corresponding path program 1 times [2022-11-03 03:59:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:46,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498861001] [2022-11-03 03:59:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:59:46,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498861001] [2022-11-03 03:59:46,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498861001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237445776] [2022-11-03 03:59:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:46,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:46,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:46,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:59:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:59:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:59:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:59:47,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237445776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:47,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063235376] [2022-11-03 03:59:47,726 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-03 03:59:47,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:47,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:47,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:47,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:57,906 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 689 for LOIs [2022-11-03 04:00:52,316 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-11-03 04:00:52,319 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-03 04:00:52,618 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 39 for LOIs [2022-11-03 04:00:52,621 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 452 for LOIs [2022-11-03 04:00:52,807 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 88 for LOIs [2022-11-03 04:00:52,833 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-03 04:00:55,108 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-03 04:00:55,327 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 42 for LOIs [2022-11-03 04:00:55,341 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 33 for LOIs [2022-11-03 04:00:55,344 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-03 04:00:59,107 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-03 04:00:59,738 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-03 04:00:59,892 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:35,783 WARN L234 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:01:44,720 WARN L234 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:01:55,339 WARN L234 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:02:11,043 WARN L234 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 689 DAG size of output: 620 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:02:28,285 WARN L234 SmtUtils]: Spent 16.13s on a formula simplification. DAG size of input: 641 DAG size of output: 615 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:02:49,805 WARN L234 SmtUtils]: Spent 19.86s on a formula simplification. DAG size of input: 678 DAG size of output: 625 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:03:08,910 WARN L234 SmtUtils]: Spent 17.69s on a formula simplification. DAG size of input: 678 DAG size of output: 619 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:03:29,956 WARN L234 SmtUtils]: Spent 17.97s on a formula simplification. DAG size of input: 679 DAG size of output: 615 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:03:49,982 WARN L234 SmtUtils]: Spent 17.00s on a formula simplification. DAG size of input: 690 DAG size of output: 615 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:09,315 WARN L234 SmtUtils]: Spent 17.50s on a formula simplification. DAG size of input: 677 DAG size of output: 615 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:19,024 WARN L234 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 678 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:59,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251129#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-03 04:04:59,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:04:59,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:04:59,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-03 04:04:59,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414350860] [2022-11-03 04:04:59,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:59,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:04:59,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:04:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 04:04:59,777 INFO L87 Difference]: Start difference. First operand 12003 states and 19231 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-03 04:05:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:27,275 INFO L93 Difference]: Finished difference Result 56628 states and 99380 transitions. [2022-11-03 04:05:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 04:05:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-03 04:05:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:27,652 INFO L225 Difference]: With dead ends: 56628 [2022-11-03 04:05:27,652 INFO L226 Difference]: Without dead ends: 39622 [2022-11-03 04:05:27,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11648 ImplicationChecksByTransitivity, 243.4s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-03 04:05:27,900 INFO L413 NwaCegarLoop]: 1245 mSDtfsCounter, 5699 mSDsluCounter, 8044 mSDsCounter, 0 mSdLazyCounter, 21807 mSolverCounterSat, 3942 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5853 SdHoareTripleChecker+Valid, 8795 SdHoareTripleChecker+Invalid, 25749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3942 IncrementalHoareTripleChecker+Valid, 21807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:27,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5853 Valid, 8795 Invalid, 25749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3942 Valid, 21807 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2022-11-03 04:05:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39622 states. [2022-11-03 04:05:31,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39622 to 31137. [2022-11-03 04:05:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31137 states, 21057 states have (on average 1.4607493945006411) internal successors, (30759), 22929 states have internal predecessors, (30759), 8077 states have call successors, (8077), 1756 states have call predecessors, (8077), 2002 states have return successors, (13141), 7469 states have call predecessors, (13141), 8049 states have call successors, (13141) [2022-11-03 04:05:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31137 states to 31137 states and 51977 transitions. [2022-11-03 04:05:32,192 INFO L78 Accepts]: Start accepts. Automaton has 31137 states and 51977 transitions. Word has length 127 [2022-11-03 04:05:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:32,193 INFO L495 AbstractCegarLoop]: Abstraction has 31137 states and 51977 transitions. [2022-11-03 04:05:32,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-03 04:05:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31137 states and 51977 transitions. [2022-11-03 04:05:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 04:05:32,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:32,215 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:32,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:32,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:32,430 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1628437606, now seen corresponding path program 1 times [2022-11-03 04:05:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012832993] [2022-11-03 04:05:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:33,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012832993] [2022-11-03 04:05:33,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012832993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113717663] [2022-11-03 04:05:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:33,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:33,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:33,567 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:33,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 04:05:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:33,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:05:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 04:05:34,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:34,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113717663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:34,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:05:34,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-03 04:05:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715298082] [2022-11-03 04:05:34,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:34,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:05:34,026 INFO L87 Difference]: Start difference. First operand 31137 states and 51977 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-03 04:05:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:38,111 INFO L93 Difference]: Finished difference Result 62894 states and 107805 transitions. [2022-11-03 04:05:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-03 04:05:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:38,471 INFO L225 Difference]: With dead ends: 62894 [2022-11-03 04:05:38,472 INFO L226 Difference]: Without dead ends: 29088 [2022-11-03 04:05:39,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:05:39,042 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 174 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:39,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1569 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:05:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29088 states. [2022-11-03 04:05:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29088 to 29031. [2022-11-03 04:05:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29031 states, 19311 states have (on average 1.4475169592460255) internal successors, (27953), 21158 states have internal predecessors, (27953), 7790 states have call successors, (7790), 1711 states have call predecessors, (7790), 1929 states have return successors, (12500), 7179 states have call predecessors, (12500), 7762 states have call successors, (12500) [2022-11-03 04:05:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29031 states to 29031 states and 48243 transitions. [2022-11-03 04:05:42,884 INFO L78 Accepts]: Start accepts. Automaton has 29031 states and 48243 transitions. Word has length 136 [2022-11-03 04:05:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:42,885 INFO L495 AbstractCegarLoop]: Abstraction has 29031 states and 48243 transitions. [2022-11-03 04:05:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-03 04:05:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 29031 states and 48243 transitions. [2022-11-03 04:05:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 04:05:42,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:42,934 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:42,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:43,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 04:05:43,135 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash 533944406, now seen corresponding path program 1 times [2022-11-03 04:05:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715537143] [2022-11-03 04:05:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:44,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715537143] [2022-11-03 04:05:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715537143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718253390] [2022-11-03 04:05:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:44,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:44,053 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:44,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bade1-bc7c-4d9f-b7ac-323ba7c16e38/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:05:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:05:44,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:05:44,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 04:05:45,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718253390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:45,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437890544] [2022-11-03 04:05:45,280 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-03 04:05:45,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:45,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:45,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:45,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:50,087 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-03 04:05:56,927 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-11-03 04:05:57,384 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-03 04:05:59,780 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-03 04:06:00,021 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-03 04:06:00,105 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-03 04:06:04,462 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-03 04:06:05,381 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-03 04:06:05,551 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:43,088 WARN L234 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:06:51,499 WARN L234 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:07:01,262 WARN L234 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:07:16,809 WARN L234 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 585 DAG size of output: 580 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:07:28,259 WARN L234 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 626 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:07:35,501 WARN L234 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 624 DAG size of output: 596 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:07:50,086 WARN L234 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:04,100 WARN L234 SmtUtils]: Spent 12.61s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:11,553 WARN L234 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 630 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:19,081 WARN L234 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 630 DAG size of output: 599 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:27,845 WARN L234 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 633 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:35,376 WARN L234 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 633 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:35,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [437890544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:35,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:08:35,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [10, 6, 7] total 42 [2022-11-03 04:08:35,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227937642] [2022-11-03 04:08:35,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 04:08:35,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:08:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 04:08:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 04:08:35,388 INFO L87 Difference]: Start difference. First operand 29031 states and 48243 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 04:08:43,346 WARN L234 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 610 DAG size of output: 575 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:50,588 WARN L234 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 616 DAG size of output: 581 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:57,563 WARN L234 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:09:11,954 WARN L234 SmtUtils]: Spent 13.60s on a formula simplification. DAG size of input: 596 DAG size of output: 578 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:09:26,115 WARN L234 SmtUtils]: Spent 13.78s on a formula simplification. DAG size of input: 602 DAG size of output: 584 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:06,797 INFO L93 Difference]: Finished difference Result 58172 states and 96656 transitions. [2022-11-03 04:10:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 04:10:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-11-03 04:10:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:07,082 INFO L225 Difference]: With dead ends: 58172 [2022-11-03 04:10:07,082 INFO L226 Difference]: Without dead ends: 29153 [2022-11-03 04:10:07,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 381 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 198.1s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 04:10:07,344 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 167 mSDsluCounter, 4134 mSDsCounter, 0 mSdLazyCounter, 5958 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 4653 SdHoareTripleChecker+Invalid, 6014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:07,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 4653 Invalid, 6014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [56 Valid, 5958 Invalid, 0 Unknown, 0 Unchecked, 39.8s Time] [2022-11-03 04:10:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29153 states.