./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur --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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:48:21,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:48:21,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:48:21,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:48:21,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:48:21,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:48:21,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:48:21,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:48:21,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:48:21,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:48:21,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:48:21,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:48:21,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:48:21,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:48:21,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:48:21,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:48:21,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:48:21,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:48:21,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:48:21,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:48:21,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:48:21,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:48:21,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:48:21,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:48:21,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:48:21,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:48:21,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:48:21,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:48:21,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:48:21,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:48:21,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:48:21,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:48:21,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:48:21,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:48:21,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:48:21,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:48:21,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:48:21,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:48:21,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:48:21,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:48:21,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:48:21,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:48:21,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:48:21,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:48:21,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:48:21,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:48:21,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:48:21,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:48:21,545 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:48:21,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:48:21,546 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:48:21,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:48:21,546 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:48:21,547 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:48:21,547 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:48:21,547 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:48:21,548 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:48:21,548 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:48:21,548 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:48:21,549 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:48:21,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:48:21,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:48:21,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:48:21,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:48:21,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:48:21,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:48:21,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:48:21,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:48:21,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:48:21,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:48:21,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:48:21,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:48:21,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:48:21,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:48:21,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:48:21,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:48:21,555 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:48:21,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:48:21,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:48:21,556 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:48:21,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:48:21,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:48:21,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:48:21,558 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_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2022-11-26 00:48:21,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:48:21,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:48:21,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:48:21,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:48:21,996 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:48:21,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-11-26 00:48:25,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:48:26,545 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:48:26,546 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2022-11-26 00:48:26,587 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/data/56979369f/9d558a2217964b18b4908cdeaacc0fcd/FLAG7bb748973 [2022-11-26 00:48:26,613 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/data/56979369f/9d558a2217964b18b4908cdeaacc0fcd [2022-11-26 00:48:26,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:48:26,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:48:26,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:48:26,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:48:26,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:48:26,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:48:26" (1/1) ... [2022-11-26 00:48:26,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791cd4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:26, skipping insertion in model container [2022-11-26 00:48:26,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:48:26" (1/1) ... [2022-11-26 00:48:26,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:48:26,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:48:27,200 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-11-26 00:48:27,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:48:27,608 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:48:27,698 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2022-11-26 00:48:27,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:48:27,900 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:48:27,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27 WrapperNode [2022-11-26 00:48:27,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:48:27,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:48:27,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:48:27,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:48:27,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:27,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,010 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 808 [2022-11-26 00:48:28,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:48:28,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:48:28,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:48:28,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:48:28,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:48:28,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:48:28,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:48:28,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:48:28,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (1/1) ... [2022-11-26 00:48:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:48:28,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:28,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:48:28,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:48:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:48:28,190 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-26 00:48:28,190 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-26 00:48:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:48:28,191 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:48:28,191 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:48:28,191 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:48:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 00:48:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 00:48:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:48:28,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:48:28,192 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:48:28,193 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:48:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:48:28,193 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:48:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:48:28,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:48:28,194 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:48:28,194 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:48:28,194 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:48:28,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:48:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:48:28,195 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:48:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-26 00:48:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-26 00:48:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:48:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:48:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-26 00:48:28,196 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-26 00:48:28,197 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:48:28,197 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:48:28,197 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:48:28,197 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:48:28,198 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:48:28,198 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:48:28,198 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:48:28,198 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:48:28,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:48:28,199 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 00:48:28,199 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 00:48:28,199 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:48:28,199 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:48:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:48:28,200 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:48:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:48:28,200 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:48:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:48:28,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:48:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:48:28,201 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:48:28,441 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:48:28,445 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:48:30,398 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:48:31,413 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:48:31,413 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:48:31,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:48:31 BoogieIcfgContainer [2022-11-26 00:48:31,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:48:31,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:48:31,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:48:31,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:48:31,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:48:26" (1/3) ... [2022-11-26 00:48:31,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f348ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:48:31, skipping insertion in model container [2022-11-26 00:48:31,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:48:27" (2/3) ... [2022-11-26 00:48:31,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f348ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:48:31, skipping insertion in model container [2022-11-26 00:48:31,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:48:31" (3/3) ... [2022-11-26 00:48:31,432 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2022-11-26 00:48:31,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:48:31,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:48:31,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:48:31,587 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;@43c4ca7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:48:31,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:48:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-26 00:48:31,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 00:48:31,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:31,639 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] [2022-11-26 00:48:31,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 13643139, now seen corresponding path program 1 times [2022-11-26 00:48:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166400125] [2022-11-26 00:48:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:32,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:32,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166400125] [2022-11-26 00:48:32,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166400125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:32,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:32,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:48:32,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554094046] [2022-11-26 00:48:32,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:32,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:48:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:48:32,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:48:32,990 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:48:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:34,241 INFO L93 Difference]: Finished difference Result 1069 states and 1731 transitions. [2022-11-26 00:48:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:48:34,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-11-26 00:48:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:34,265 INFO L225 Difference]: With dead ends: 1069 [2022-11-26 00:48:34,266 INFO L226 Difference]: Without dead ends: 694 [2022-11-26 00:48:34,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:48:34,284 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 511 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:34,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1731 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:48:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-26 00:48:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 686. [2022-11-26 00:48:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 465 states have (on average 1.5225806451612902) internal successors, (708), 495 states have internal predecessors, (708), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-11-26 00:48:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1069 transitions. [2022-11-26 00:48:34,424 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1069 transitions. Word has length 63 [2022-11-26 00:48:34,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:34,425 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 1069 transitions. [2022-11-26 00:48:34,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:48:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1069 transitions. [2022-11-26 00:48:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:48:34,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:34,430 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] [2022-11-26 00:48:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:48:34,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash 19520656, now seen corresponding path program 1 times [2022-11-26 00:48:34,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:34,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215389370] [2022-11-26 00:48:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:34,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:34,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:34,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215389370] [2022-11-26 00:48:34,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215389370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:34,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:34,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:48:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136286130] [2022-11-26 00:48:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:48:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:48:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:48:34,930 INFO L87 Difference]: Start difference. First operand 686 states and 1069 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 00:48:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:35,380 INFO L93 Difference]: Finished difference Result 1320 states and 2107 transitions. [2022-11-26 00:48:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:48:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2022-11-26 00:48:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:35,397 INFO L225 Difference]: With dead ends: 1320 [2022-11-26 00:48:35,397 INFO L226 Difference]: Without dead ends: 876 [2022-11-26 00:48:35,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:48:35,410 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:35,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1747 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:48:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-26 00:48:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 690. [2022-11-26 00:48:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 469 states have (on average 1.5181236673773988) internal successors, (712), 499 states have internal predecessors, (712), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2022-11-26 00:48:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1073 transitions. [2022-11-26 00:48:35,529 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1073 transitions. Word has length 68 [2022-11-26 00:48:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:35,530 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1073 transitions. [2022-11-26 00:48:35,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-26 00:48:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1073 transitions. [2022-11-26 00:48:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:48:35,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:35,534 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] [2022-11-26 00:48:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:48:35,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1309187174, now seen corresponding path program 1 times [2022-11-26 00:48:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:35,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133169869] [2022-11-26 00:48:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:48:36,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:36,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133169869] [2022-11-26 00:48:36,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133169869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099905855] [2022-11-26 00:48:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:36,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:36,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:36,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:48:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:36,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:48:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:36,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099905855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:36,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:36,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 00:48:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431977707] [2022-11-26 00:48:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:36,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:48:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:48:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:36,858 INFO L87 Difference]: Start difference. First operand 690 states and 1073 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) [2022-11-26 00:48:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:37,819 INFO L93 Difference]: Finished difference Result 1143 states and 1781 transitions. [2022-11-26 00:48:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:48:37,820 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 [2022-11-26 00:48:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:37,830 INFO L225 Difference]: With dead ends: 1143 [2022-11-26 00:48:37,830 INFO L226 Difference]: Without dead ends: 698 [2022-11-26 00:48:37,834 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 [2022-11-26 00:48:37,839 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 419 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:37,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2295 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:48:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-26 00:48:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2022-11-26 00:48:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.515923566878981) internal successors, (714), 502 states have internal predecessors, (714), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-26 00:48:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1076 transitions. [2022-11-26 00:48:37,925 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1076 transitions. Word has length 72 [2022-11-26 00:48:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:37,927 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1076 transitions. [2022-11-26 00:48:37,927 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) [2022-11-26 00:48:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1076 transitions. [2022-11-26 00:48:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:48:37,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:37,932 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] [2022-11-26 00:48:37,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:48:38,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:38,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1183509830, now seen corresponding path program 1 times [2022-11-26 00:48:38,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:38,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655122830] [2022-11-26 00:48:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:38,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:48:38,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:38,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655122830] [2022-11-26 00:48:38,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655122830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:38,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473151061] [2022-11-26 00:48:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:38,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:38,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:38,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:48:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:48:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:39,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:39,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473151061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:39,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:39,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-26 00:48:39,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735374419] [2022-11-26 00:48:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:39,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:48:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:48:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:48:39,202 INFO L87 Difference]: Start difference. First operand 694 states and 1076 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) [2022-11-26 00:48:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:39,546 INFO L93 Difference]: Finished difference Result 1242 states and 1958 transitions. [2022-11-26 00:48:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:48:39,547 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 [2022-11-26 00:48:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:39,553 INFO L225 Difference]: With dead ends: 1242 [2022-11-26 00:48:39,553 INFO L226 Difference]: Without dead ends: 694 [2022-11-26 00:48:39,557 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 [2022-11-26 00:48:39,559 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 269 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:39,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1544 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:48:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-26 00:48:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2022-11-26 00:48:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.4861995753715498) internal successors, (700), 502 states have internal predecessors, (700), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-26 00:48:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1062 transitions. [2022-11-26 00:48:39,615 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1062 transitions. Word has length 73 [2022-11-26 00:48:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:39,616 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1062 transitions. [2022-11-26 00:48:39,616 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) [2022-11-26 00:48:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1062 transitions. [2022-11-26 00:48:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:48:39,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:39,619 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] [2022-11-26 00:48:39,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:39,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-26 00:48:39,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2120738951, now seen corresponding path program 1 times [2022-11-26 00:48:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880460794] [2022-11-26 00:48:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:39,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:48:40,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880460794] [2022-11-26 00:48:40,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880460794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979892030] [2022-11-26 00:48:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:40,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:40,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:40,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:48:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:48:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:48:41,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:48:41,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979892030] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:41,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:48:41,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-26 00:48:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20816651] [2022-11-26 00:48:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:48:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:48:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:48:41,520 INFO L87 Difference]: Start difference. First operand 694 states and 1062 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) [2022-11-26 00:48:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:45,993 INFO L93 Difference]: Finished difference Result 1635 states and 2612 transitions. [2022-11-26 00:48:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:48:45,994 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 [2022-11-26 00:48:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:46,011 INFO L225 Difference]: With dead ends: 1635 [2022-11-26 00:48:46,012 INFO L226 Difference]: Without dead ends: 1275 [2022-11-26 00:48:46,017 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 [2022-11-26 00:48:46,022 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 2811 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 1319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2890 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1319 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:46,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2890 Valid, 2657 Invalid, 3733 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1319 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-26 00:48:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-11-26 00:48:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1205. [2022-11-26 00:48:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 838 states have (on average 1.5023866348448687) internal successors, (1259), 885 states have internal predecessors, (1259), 292 states have call successors, (292), 73 states have call predecessors, (292), 74 states have return successors, (329), 282 states have call predecessors, (329), 287 states have call successors, (329) [2022-11-26 00:48:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1880 transitions. [2022-11-26 00:48:46,186 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1880 transitions. Word has length 75 [2022-11-26 00:48:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:46,186 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1880 transitions. [2022-11-26 00:48:46,187 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) [2022-11-26 00:48:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1880 transitions. [2022-11-26 00:48:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 00:48:46,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:46,189 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] [2022-11-26 00:48:46,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:46,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:46,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2022540589, now seen corresponding path program 1 times [2022-11-26 00:48:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131293042] [2022-11-26 00:48:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:48:46,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:46,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131293042] [2022-11-26 00:48:46,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131293042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:46,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940931101] [2022-11-26 00:48:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:46,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:46,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:46,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:46,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:48:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:48:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:47,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:47,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940931101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:47,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:47,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:48:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669252688] [2022-11-26 00:48:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:47,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:47,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:47,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:48:47,285 INFO L87 Difference]: Start difference. First operand 1205 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 00:48:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:47,709 INFO L93 Difference]: Finished difference Result 3440 states and 5513 transitions. [2022-11-26 00:48:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2022-11-26 00:48:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:47,744 INFO L225 Difference]: With dead ends: 3440 [2022-11-26 00:48:47,744 INFO L226 Difference]: Without dead ends: 2247 [2022-11-26 00:48:47,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:48:47,756 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:47,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1341 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:48:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-11-26 00:48:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2191. [2022-11-26 00:48:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1534 states have (on average 1.5097783572359844) internal successors, (2316), 1629 states have internal predecessors, (2316), 516 states have call successors, (516), 131 states have call predecessors, (516), 140 states have return successors, (608), 502 states have call predecessors, (608), 511 states have call successors, (608) [2022-11-26 00:48:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 3440 transitions. [2022-11-26 00:48:48,125 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 3440 transitions. Word has length 76 [2022-11-26 00:48:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:48,126 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 3440 transitions. [2022-11-26 00:48:48,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 00:48:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 3440 transitions. [2022-11-26 00:48:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:48:48,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:48,134 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] [2022-11-26 00:48:48,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:48,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:48,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 152698590, now seen corresponding path program 1 times [2022-11-26 00:48:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:48,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031303947] [2022-11-26 00:48:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:48:48,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:48,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031303947] [2022-11-26 00:48:48,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031303947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:48,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3180193] [2022-11-26 00:48:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:48,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:48,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:48:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:49,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:48:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:49,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:49,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3180193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:49,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:49,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 00:48:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651287456] [2022-11-26 00:48:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:49,340 INFO L87 Difference]: Start difference. First operand 2191 states and 3440 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) [2022-11-26 00:48:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:49,790 INFO L93 Difference]: Finished difference Result 5112 states and 8137 transitions. [2022-11-26 00:48:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:49,791 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 [2022-11-26 00:48:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:49,819 INFO L225 Difference]: With dead ends: 5112 [2022-11-26 00:48:49,819 INFO L226 Difference]: Without dead ends: 2933 [2022-11-26 00:48:49,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:49,842 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 521 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:49,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1080 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:48:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-11-26 00:48:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2889. [2022-11-26 00:48:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (797), 652 states have call predecessors, (797), 664 states have call successors, (797) [2022-11-26 00:48:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4555 transitions. [2022-11-26 00:48:50,197 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4555 transitions. Word has length 75 [2022-11-26 00:48:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:50,197 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4555 transitions. [2022-11-26 00:48:50,198 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) [2022-11-26 00:48:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4555 transitions. [2022-11-26 00:48:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:48:50,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:50,205 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] [2022-11-26 00:48:50,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:48:50,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:50,415 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash -154683306, now seen corresponding path program 1 times [2022-11-26 00:48:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:50,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593351406] [2022-11-26 00:48:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:50,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:48:50,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:50,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593351406] [2022-11-26 00:48:50,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593351406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:50,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279486276] [2022-11-26 00:48:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:50,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:50,856 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:50,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:48:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:51,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:48:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:48:51,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:51,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279486276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:51,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:51,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 00:48:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360564569] [2022-11-26 00:48:51,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:48:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:48:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:51,571 INFO L87 Difference]: Start difference. First operand 2889 states and 4555 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) [2022-11-26 00:48:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:52,572 INFO L93 Difference]: Finished difference Result 5184 states and 8208 transitions. [2022-11-26 00:48:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:48:52,573 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 [2022-11-26 00:48:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:52,599 INFO L225 Difference]: With dead ends: 5184 [2022-11-26 00:48:52,599 INFO L226 Difference]: Without dead ends: 2897 [2022-11-26 00:48:52,617 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 [2022-11-26 00:48:52,619 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 396 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:52,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2513 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:48:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-11-26 00:48:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2889. [2022-11-26 00:48:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (793), 652 states have call predecessors, (793), 664 states have call successors, (793) [2022-11-26 00:48:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4551 transitions. [2022-11-26 00:48:52,946 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4551 transitions. Word has length 79 [2022-11-26 00:48:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:52,947 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4551 transitions. [2022-11-26 00:48:52,947 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) [2022-11-26 00:48:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4551 transitions. [2022-11-26 00:48:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-26 00:48:52,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:52,954 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] [2022-11-26 00:48:52,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:48:53,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1242674534, now seen corresponding path program 1 times [2022-11-26 00:48:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850199954] [2022-11-26 00:48:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:53,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:48:53,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850199954] [2022-11-26 00:48:53,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850199954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496998726] [2022-11-26 00:48:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:53,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:53,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:53,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:48:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:48:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:48:53,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:53,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496998726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:53,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:53,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-26 00:48:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540438654] [2022-11-26 00:48:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:48:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:48:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:53,992 INFO L87 Difference]: Start difference. First operand 2889 states and 4551 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) [2022-11-26 00:48:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:54,427 INFO L93 Difference]: Finished difference Result 5459 states and 8715 transitions. [2022-11-26 00:48:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:48:54,428 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 [2022-11-26 00:48:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:54,457 INFO L225 Difference]: With dead ends: 5459 [2022-11-26 00:48:54,458 INFO L226 Difference]: Without dead ends: 3010 [2022-11-26 00:48:54,476 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 [2022-11-26 00:48:54,479 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:54,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2204 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-26 00:48:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2933. [2022-11-26 00:48:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2065 states have (on average 1.510411622276029) internal successors, (3119), 2198 states have internal predecessors, (3119), 669 states have call successors, (669), 170 states have call predecessors, (669), 198 states have return successors, (833), 660 states have call predecessors, (833), 664 states have call successors, (833) [2022-11-26 00:48:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4621 transitions. [2022-11-26 00:48:54,754 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4621 transitions. Word has length 99 [2022-11-26 00:48:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:54,755 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 4621 transitions. [2022-11-26 00:48:54,755 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) [2022-11-26 00:48:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4621 transitions. [2022-11-26 00:48:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-26 00:48:54,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:54,764 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, 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] [2022-11-26 00:48:54,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:48:54,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -997829384, now seen corresponding path program 1 times [2022-11-26 00:48:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:54,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964077118] [2022-11-26 00:48:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:48:55,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:55,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964077118] [2022-11-26 00:48:55,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964077118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:55,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723938600] [2022-11-26 00:48:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:55,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:55,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:55,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:48:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:48:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:48:56,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:56,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723938600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:56,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:56,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 00:48:56,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585021526] [2022-11-26 00:48:56,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:56,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:56,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:56,099 INFO L87 Difference]: Start difference. First operand 2933 states and 4621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-26 00:48:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:56,550 INFO L93 Difference]: Finished difference Result 6625 states and 10624 transitions. [2022-11-26 00:48:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:56,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2022-11-26 00:48:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:56,593 INFO L225 Difference]: With dead ends: 6625 [2022-11-26 00:48:56,593 INFO L226 Difference]: Without dead ends: 3704 [2022-11-26 00:48:56,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:56,617 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 529 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:56,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1282 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-26 00:48:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-11-26 00:48:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.512412723041117) internal successors, (3899), 2745 states have internal predecessors, (3899), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-26 00:48:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5761 transitions. [2022-11-26 00:48:57,128 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5761 transitions. Word has length 117 [2022-11-26 00:48:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:57,129 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5761 transitions. [2022-11-26 00:48:57,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-26 00:48:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5761 transitions. [2022-11-26 00:48:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-26 00:48:57,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:57,145 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] [2022-11-26 00:48:57,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:48:57,355 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991831, now seen corresponding path program 1 times [2022-11-26 00:48:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596980180] [2022-11-26 00:48:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:48:57,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596980180] [2022-11-26 00:48:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596980180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205130919] [2022-11-26 00:48:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:57,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:57,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:57,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:48:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:48:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:48:58,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:58,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205130919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:58,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:58,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 00:48:58,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512110955] [2022-11-26 00:48:58,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:58,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:48:58,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:48:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:58,405 INFO L87 Difference]: Start difference. First operand 3648 states and 5761 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) [2022-11-26 00:48:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:58,850 INFO L93 Difference]: Finished difference Result 7340 states and 11753 transitions. [2022-11-26 00:48:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:48:58,851 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 [2022-11-26 00:48:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:58,883 INFO L225 Difference]: With dead ends: 7340 [2022-11-26 00:48:58,883 INFO L226 Difference]: Without dead ends: 3704 [2022-11-26 00:48:58,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:48:58,907 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:58,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1492 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-11-26 00:48:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2022-11-26 00:48:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.5096974398758727) internal successors, (3892), 2745 states have internal predecessors, (3892), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-26 00:48:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5754 transitions. [2022-11-26 00:48:59,201 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5754 transitions. Word has length 118 [2022-11-26 00:48:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:59,202 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5754 transitions. [2022-11-26 00:48:59,202 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) [2022-11-26 00:48:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5754 transitions. [2022-11-26 00:48:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-26 00:48:59,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:59,210 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] [2022-11-26 00:48:59,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:59,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:59,418 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:48:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash 774985050, now seen corresponding path program 1 times [2022-11-26 00:48:59,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:59,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453406040] [2022-11-26 00:48:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:59,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:48:59,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453406040] [2022-11-26 00:48:59,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453406040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015970749] [2022-11-26 00:48:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:59,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:59,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:59,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:49:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:49:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:49:00,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:49:00,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015970749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:00,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:49:00,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-26 00:49:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020866983] [2022-11-26 00:49:00,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:00,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:49:00,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:49:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:49:00,368 INFO L87 Difference]: Start difference. First operand 3648 states and 5754 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) [2022-11-26 00:49:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:04,196 INFO L93 Difference]: Finished difference Result 8197 states and 13092 transitions. [2022-11-26 00:49:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:49:04,197 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 [2022-11-26 00:49:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:04,229 INFO L225 Difference]: With dead ends: 8197 [2022-11-26 00:49:04,229 INFO L226 Difference]: Without dead ends: 4435 [2022-11-26 00:49:04,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:49:04,247 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1604 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 4673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:04,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 1528 Invalid, 4673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-26 00:49:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2022-11-26 00:49:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3643. [2022-11-26 00:49:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2573 states have (on average 1.5102992615623785) internal successors, (3886), 2740 states have internal predecessors, (3886), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2022-11-26 00:49:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5748 transitions. [2022-11-26 00:49:04,692 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5748 transitions. Word has length 117 [2022-11-26 00:49:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:04,693 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5748 transitions. [2022-11-26 00:49:04,693 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) [2022-11-26 00:49:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5748 transitions. [2022-11-26 00:49:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 00:49:04,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:04,704 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] [2022-11-26 00:49:04,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:49:04,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:49:04,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:49:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash -834393372, now seen corresponding path program 1 times [2022-11-26 00:49:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:04,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934250539] [2022-11-26 00:49:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:49:05,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934250539] [2022-11-26 00:49:05,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934250539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188667218] [2022-11-26 00:49:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:05,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:05,343 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:05,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:49:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:49:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:49:05,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:49:05,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188667218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:05,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:49:05,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-26 00:49:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908425484] [2022-11-26 00:49:05,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:05,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:49:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:49:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:49:05,821 INFO L87 Difference]: Start difference. First operand 3643 states and 5748 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) [2022-11-26 00:49:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:07,123 INFO L93 Difference]: Finished difference Result 7538 states and 12125 transitions. [2022-11-26 00:49:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:49:07,124 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 [2022-11-26 00:49:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:07,155 INFO L225 Difference]: With dead ends: 7538 [2022-11-26 00:49:07,155 INFO L226 Difference]: Without dead ends: 4514 [2022-11-26 00:49:07,173 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 [2022-11-26 00:49:07,173 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 673 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:07,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1172 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:49:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2022-11-26 00:49:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4401. [2022-11-26 00:49:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 3011 states have (on average 1.4985054799070077) internal successors, (4512), 3226 states have internal predecessors, (4512), 1081 states have call successors, (1081), 279 states have call predecessors, (1081), 308 states have return successors, (1351), 1063 states have call predecessors, (1351), 1074 states have call successors, (1351) [2022-11-26 00:49:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 6944 transitions. [2022-11-26 00:49:07,543 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 6944 transitions. Word has length 123 [2022-11-26 00:49:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:07,546 INFO L495 AbstractCegarLoop]: Abstraction has 4401 states and 6944 transitions. [2022-11-26 00:49:07,546 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) [2022-11-26 00:49:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 6944 transitions. [2022-11-26 00:49:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 00:49:07,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:07,554 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] [2022-11-26 00:49:07,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:49:07,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:07,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:49:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash 357934980, now seen corresponding path program 1 times [2022-11-26 00:49:07,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:07,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964697181] [2022-11-26 00:49:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:49:08,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964697181] [2022-11-26 00:49:08,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964697181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:08,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514792653] [2022-11-26 00:49:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:08,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:08,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:08,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:08,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:49:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:49:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:49:08,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:49:08,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514792653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:08,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:49:08,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-26 00:49:08,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849053985] [2022-11-26 00:49:08,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:49:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:49:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:49:08,597 INFO L87 Difference]: Start difference. First operand 4401 states and 6944 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) [2022-11-26 00:49:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:10,157 INFO L93 Difference]: Finished difference Result 11083 states and 17801 transitions. [2022-11-26 00:49:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:49:10,158 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 [2022-11-26 00:49:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:10,202 INFO L225 Difference]: With dead ends: 11083 [2022-11-26 00:49:10,203 INFO L226 Difference]: Without dead ends: 7279 [2022-11-26 00:49:10,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:49:10,231 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:10,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:49:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2022-11-26 00:49:10,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2022-11-26 00:49:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7261 states, 4887 states have (on average 1.4923265807243709) internal successors, (7293), 5268 states have internal predecessors, (7293), 1869 states have call successors, (1869), 473 states have call predecessors, (1869), 504 states have return successors, (2297), 1831 states have call predecessors, (2297), 1858 states have call successors, (2297) [2022-11-26 00:49:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 11459 transitions. [2022-11-26 00:49:11,029 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 11459 transitions. Word has length 124 [2022-11-26 00:49:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:11,029 INFO L495 AbstractCegarLoop]: Abstraction has 7261 states and 11459 transitions. [2022-11-26 00:49:11,030 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) [2022-11-26 00:49:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 11459 transitions. [2022-11-26 00:49:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:49:11,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:11,040 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] [2022-11-26 00:49:11,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-26 00:49:11,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:49:11,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:49:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash 530631708, now seen corresponding path program 1 times [2022-11-26 00:49:11,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:11,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747790130] [2022-11-26 00:49:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:49:11,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:11,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747790130] [2022-11-26 00:49:11,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747790130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:11,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292010698] [2022-11-26 00:49:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:11,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:11,607 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:11,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:49:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:49:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:49:12,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:49:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292010698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:12,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:49:12,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-26 00:49:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039722243] [2022-11-26 00:49:12,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:12,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:49:12,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:49:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:49:12,144 INFO L87 Difference]: Start difference. First operand 7261 states and 11459 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) [2022-11-26 00:49:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:14,141 INFO L93 Difference]: Finished difference Result 18186 states and 29039 transitions. [2022-11-26 00:49:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:49:14,141 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 [2022-11-26 00:49:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:14,208 INFO L225 Difference]: With dead ends: 18186 [2022-11-26 00:49:14,208 INFO L226 Difference]: Without dead ends: 11544 [2022-11-26 00:49:14,278 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 [2022-11-26 00:49:14,279 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 655 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:14,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 4248 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:49:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2022-11-26 00:49:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10469. [2022-11-26 00:49:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 6995 states have (on average 1.4932094353109364) internal successors, (10445), 7562 states have internal predecessors, (10445), 2765 states have call successors, (2765), 667 states have call predecessors, (2765), 708 states have return successors, (3474), 2719 states have call predecessors, (3474), 2748 states have call successors, (3474) [2022-11-26 00:49:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 16684 transitions. [2022-11-26 00:49:15,265 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 16684 transitions. Word has length 125 [2022-11-26 00:49:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:15,266 INFO L495 AbstractCegarLoop]: Abstraction has 10469 states and 16684 transitions. [2022-11-26 00:49:15,266 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) [2022-11-26 00:49:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 16684 transitions. [2022-11-26 00:49:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-26 00:49:15,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:15,276 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] [2022-11-26 00:49:15,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-26 00:49:15,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:49:15,486 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:49:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash 388142882, now seen corresponding path program 1 times [2022-11-26 00:49:15,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:15,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099097910] [2022-11-26 00:49:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:49:15,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099097910] [2022-11-26 00:49:15,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099097910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159065597] [2022-11-26 00:49:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:15,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:15,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:49:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:49:16,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:49:16,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:49:16,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159065597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098875564] [2022-11-26 00:49:16,940 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-26 00:49:16,941 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:16,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:16,951 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:16,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:25,955 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2022-11-26 00:50:10,761 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-11-26 00:50:10,763 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-26 00:50:10,977 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 36 for LOIs [2022-11-26 00:50:10,980 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2022-11-26 00:50:11,138 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-11-26 00:50:11,153 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-26 00:50:13,288 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-26 00:50:13,489 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 39 for LOIs [2022-11-26 00:50:13,500 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 30 for LOIs [2022-11-26 00:50:13,505 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-26 00:50:16,999 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:50:17,572 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:50:17,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:50,605 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:50:57,950 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:51:06,627 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:51:25,773 WARN L233 SmtUtils]: Spent 13.05s on a formula simplification. DAG size of input: 677 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:51:39,930 WARN L233 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 633 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:51:55,818 WARN L233 SmtUtils]: Spent 15.15s on a formula simplification. DAG size of input: 668 DAG size of output: 611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:52:11,677 WARN L233 SmtUtils]: Spent 15.36s on a formula simplification. DAG size of input: 668 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:52:28,140 WARN L233 SmtUtils]: Spent 15.41s on a formula simplification. DAG size of input: 669 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:52:45,693 WARN L233 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 680 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:01,368 WARN L233 SmtUtils]: Spent 15.08s on a formula simplification. DAG size of input: 667 DAG size of output: 609 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:08,914 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 668 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:53:34,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192521#(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|) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:53:34,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:53:34,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:53:34,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-26 00:53:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166146412] [2022-11-26 00:53:34,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:53:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:53:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:53:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 00:53:34,144 INFO L87 Difference]: Start difference. First operand 10469 states and 16684 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) [2022-11-26 00:53:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:58,214 INFO L93 Difference]: Finished difference Result 51622 states and 88186 transitions. [2022-11-26 00:53:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 00:53:58,215 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 [2022-11-26 00:53:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:58,491 INFO L225 Difference]: With dead ends: 51622 [2022-11-26 00:53:58,491 INFO L226 Difference]: Without dead ends: 36010 [2022-11-26 00:53:58,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11646 ImplicationChecksByTransitivity, 199.3s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-26 00:53:58,664 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 7740 mSDsluCounter, 7242 mSDsCounter, 0 mSdLazyCounter, 20134 mSolverCounterSat, 5585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7908 SdHoareTripleChecker+Valid, 8112 SdHoareTripleChecker+Invalid, 25719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5585 IncrementalHoareTripleChecker+Valid, 20134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:58,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7908 Valid, 8112 Invalid, 25719 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5585 Valid, 20134 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-11-26 00:53:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36010 states. [2022-11-26 00:54:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36010 to 27876. [2022-11-26 00:54:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27876 states, 18609 states have (on average 1.4911064538664087) internal successors, (27748), 20488 states have internal predecessors, (27748), 7585 states have call successors, (7585), 1491 states have call predecessors, (7585), 1681 states have return successors, (10918), 6897 states have call predecessors, (10918), 7557 states have call successors, (10918) [2022-11-26 00:54:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27876 states to 27876 states and 46251 transitions. [2022-11-26 00:54:01,705 INFO L78 Accepts]: Start accepts. Automaton has 27876 states and 46251 transitions. Word has length 127 [2022-11-26 00:54:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:01,706 INFO L495 AbstractCegarLoop]: Abstraction has 27876 states and 46251 transitions. [2022-11-26 00:54:01,706 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) [2022-11-26 00:54:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27876 states and 46251 transitions. [2022-11-26 00:54:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:54:01,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:01,722 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] [2022-11-26 00:54:01,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:01,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:54:01,931 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash -858915501, now seen corresponding path program 1 times [2022-11-26 00:54:01,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:01,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860231447] [2022-11-26 00:54:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:54:02,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860231447] [2022-11-26 00:54:02,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860231447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:02,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538005074] [2022-11-26 00:54:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:02,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:02,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:02,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:02,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:54:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:54:02,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:54:02,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:02,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538005074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:02,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:02,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-26 00:54:02,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664198121] [2022-11-26 00:54:02,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:02,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:54:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:54:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:54:02,979 INFO L87 Difference]: Start difference. First operand 27876 states and 46251 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) [2022-11-26 00:54:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:05,568 INFO L93 Difference]: Finished difference Result 56544 states and 95557 transitions. [2022-11-26 00:54:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:54:05,569 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 [2022-11-26 00:54:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:05,744 INFO L225 Difference]: With dead ends: 56544 [2022-11-26 00:54:05,744 INFO L226 Difference]: Without dead ends: 26613 [2022-11-26 00:54:05,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:54:05,953 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 177 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:05,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1554 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:54:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-11-26 00:54:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26591. [2022-11-26 00:54:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26591 states, 17541 states have (on average 1.4765406761302091) internal successors, (25900), 19402 states have internal predecessors, (25900), 7409 states have call successors, (7409), 1467 states have call predecessors, (7409), 1640 states have return successors, (10662), 6722 states have call predecessors, (10662), 7381 states have call successors, (10662) [2022-11-26 00:54:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26591 states to 26591 states and 43971 transitions. [2022-11-26 00:54:08,327 INFO L78 Accepts]: Start accepts. Automaton has 26591 states and 43971 transitions. Word has length 136 [2022-11-26 00:54:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:08,327 INFO L495 AbstractCegarLoop]: Abstraction has 26591 states and 43971 transitions. [2022-11-26 00:54:08,328 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) [2022-11-26 00:54:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 26591 states and 43971 transitions. [2022-11-26 00:54:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-26 00:54:08,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:08,343 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] [2022-11-26 00:54:08,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:08,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:54:08,551 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:08,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1444136859, now seen corresponding path program 1 times [2022-11-26 00:54:08,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:08,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847007472] [2022-11-26 00:54:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:08,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:54:09,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847007472] [2022-11-26 00:54:09,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847007472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:09,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497617272] [2022-11-26 00:54:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:09,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:09,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:09,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:54:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:09,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:54:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:54:09,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:54:10,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497617272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305196254] [2022-11-26 00:54:10,351 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-11-26 00:54:10,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:10,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:10,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:10,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:14,342 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-11-26 00:54:19,892 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2022-11-26 00:54:20,233 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-26 00:54:22,290 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-26 00:54:22,488 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-11-26 00:54:22,561 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-26 00:54:26,343 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:54:26,922 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:54:27,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:59,414 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:06,746 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:15,357 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:38,670 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 618 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:44,817 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 616 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:55,280 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 491 DAG size of output: 438 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:05,157 WARN L233 SmtUtils]: Spent 9.41s on a formula simplification. DAG size of input: 527 DAG size of output: 446 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:11,497 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 622 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:17,891 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 620 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:25,231 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 625 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:31,757 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 625 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:31,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1305196254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:31,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:31,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 39 [2022-11-26 00:56:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810917693] [2022-11-26 00:56:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:31,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:56:31,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:56:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:56:31,769 INFO L87 Difference]: Start difference. First operand 26591 states and 43971 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) [2022-11-26 00:56:38,749 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 606 DAG size of output: 571 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:45,068 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 612 DAG size of output: 577 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:02,131 WARN L233 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 589 DAG size of output: 572 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:13,131 WARN L233 SmtUtils]: Spent 10.74s on a formula simplification. DAG size of input: 595 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:44,352 INFO L93 Difference]: Finished difference Result 53276 states and 87641 transitions. [2022-11-26 00:57:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:57:44,353 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 [2022-11-26 00:57:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:44,537 INFO L225 Difference]: With dead ends: 53276 [2022-11-26 00:57:44,538 INFO L226 Difference]: Without dead ends: 26713 [2022-11-26 00:57:44,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 383 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 164.2s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:57:44,701 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 156 mSDsluCounter, 3754 mSDsCounter, 0 mSdLazyCounter, 5171 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 5210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:44,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 4324 Invalid, 5210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 5171 Invalid, 0 Unknown, 0 Unchecked, 30.9s Time] [2022-11-26 00:57:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26713 states. [2022-11-26 00:57:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26713 to 26634. [2022-11-26 00:57:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26634 states, 17574 states have (on average 1.475873449413907) internal successors, (25937), 19434 states have internal predecessors, (25937), 7415 states have call successors, (7415), 1472 states have call predecessors, (7415), 1644 states have return successors, (10668), 6728 states have call predecessors, (10668), 7387 states have call successors, (10668) [2022-11-26 00:57:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26634 states to 26634 states and 44020 transitions. [2022-11-26 00:57:47,234 INFO L78 Accepts]: Start accepts. Automaton has 26634 states and 44020 transitions. Word has length 140 [2022-11-26 00:57:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:47,234 INFO L495 AbstractCegarLoop]: Abstraction has 26634 states and 44020 transitions. [2022-11-26 00:57:47,235 INFO L496 AbstractCegarLoop]: INTERPOLANT 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) [2022-11-26 00:57:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26634 states and 44020 transitions. [2022-11-26 00:57:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-26 00:57:47,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:47,243 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:47,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:47,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:57:47,456 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash 493869230, now seen corresponding path program 1 times [2022-11-26 00:57:47,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216940093] [2022-11-26 00:57:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:47,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-26 00:57:48,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:48,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216940093] [2022-11-26 00:57:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216940093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432884142] [2022-11-26 00:57:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:48,725 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:48,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:57:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:57:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:57:49,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:57:49,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432884142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:49,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:57:49,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-26 00:57:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912996898] [2022-11-26 00:57:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:49,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:57:49,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:57:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:57:49,217 INFO L87 Difference]: Start difference. First operand 26634 states and 44020 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 00:57:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:52,890 INFO L93 Difference]: Finished difference Result 51319 states and 85476 transitions. [2022-11-26 00:57:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:57:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-26 00:57:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:53,044 INFO L225 Difference]: With dead ends: 51319 [2022-11-26 00:57:53,044 INFO L226 Difference]: Without dead ends: 25848 [2022-11-26 00:57:53,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:57:53,205 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 651 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:53,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 4110 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:57:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25848 states. [2022-11-26 00:57:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25848 to 24852. [2022-11-26 00:57:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24852 states, 16415 states have (on average 1.4768199817240328) internal successors, (24242), 18114 states have internal predecessors, (24242), 6818 states have call successors, (6818), 1455 states have call predecessors, (6818), 1618 states have return successors, (9665), 6197 states have call predecessors, (9665), 6782 states have call successors, (9665) [2022-11-26 00:57:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24852 states to 24852 states and 40725 transitions. [2022-11-26 00:57:55,436 INFO L78 Accepts]: Start accepts. Automaton has 24852 states and 40725 transitions. Word has length 139 [2022-11-26 00:57:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:55,437 INFO L495 AbstractCegarLoop]: Abstraction has 24852 states and 40725 transitions. [2022-11-26 00:57:55,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-26 00:57:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24852 states and 40725 transitions. [2022-11-26 00:57:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 00:57:55,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:55,446 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:55,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-26 00:57:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:55,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 549565040, now seen corresponding path program 1 times [2022-11-26 00:57:55,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:55,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119826171] [2022-11-26 00:57:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:57:56,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:56,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119826171] [2022-11-26 00:57:56,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119826171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922911049] [2022-11-26 00:57:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:56,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:56,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:56,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:56,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:57:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:57,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:57:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:57:57,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:57:57,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922911049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:57,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:57:57,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2022-11-26 00:57:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544293912] [2022-11-26 00:57:57,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:57,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:57:57,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:57:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:57:57,029 INFO L87 Difference]: Start difference. First operand 24852 states and 40725 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 00:57:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:59,482 INFO L93 Difference]: Finished difference Result 45177 states and 75769 transitions. [2022-11-26 00:57:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:57:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2022-11-26 00:57:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:59,620 INFO L225 Difference]: With dead ends: 45177 [2022-11-26 00:57:59,620 INFO L226 Difference]: Without dead ends: 21470 [2022-11-26 00:57:59,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:57:59,938 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 100 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:59,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1284 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:57:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21470 states. [2022-11-26 00:58:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21470 to 21311. [2022-11-26 00:58:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 14171 states have (on average 1.4632700585703198) internal successors, (20736), 15530 states have internal predecessors, (20736), 5707 states have call successors, (5707), 1289 states have call predecessors, (5707), 1432 states have return successors, (8234), 5242 states have call predecessors, (8234), 5671 states have call successors, (8234) [2022-11-26 00:58:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 34677 transitions. [2022-11-26 00:58:01,993 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 34677 transitions. Word has length 142 [2022-11-26 00:58:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:01,994 INFO L495 AbstractCegarLoop]: Abstraction has 21311 states and 34677 transitions. [2022-11-26 00:58:01,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 00:58:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 34677 transitions. [2022-11-26 00:58:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 00:58:02,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:02,006 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:02,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:02,207 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1563552564, now seen corresponding path program 1 times [2022-11-26 00:58:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517492435] [2022-11-26 00:58:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:58:03,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517492435] [2022-11-26 00:58:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517492435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754338134] [2022-11-26 00:58:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:03,421 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:03,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:58:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:58:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:58:03,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:03,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754338134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:03,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:58:03,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-26 00:58:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31607708] [2022-11-26 00:58:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:58:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:58:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:58:03,947 INFO L87 Difference]: Start difference. First operand 21311 states and 34677 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-26 00:58:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:07,702 INFO L93 Difference]: Finished difference Result 41441 states and 67385 transitions. [2022-11-26 00:58:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:58:07,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-11-26 00:58:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:07,832 INFO L225 Difference]: With dead ends: 41441 [2022-11-26 00:58:07,832 INFO L226 Difference]: Without dead ends: 21379 [2022-11-26 00:58:07,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:58:07,943 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 551 mSDsluCounter, 3951 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:07,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 4893 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:58:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2022-11-26 00:58:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 21355. [2022-11-26 00:58:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 14215 states have (on average 1.4618360886387618) internal successors, (20780), 15552 states have internal predecessors, (20780), 5707 states have call successors, (5707), 1311 states have call predecessors, (5707), 1432 states have return successors, (8182), 5242 states have call predecessors, (8182), 5671 states have call successors, (8182) [2022-11-26 00:58:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 34669 transitions. [2022-11-26 00:58:10,031 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 34669 transitions. Word has length 142 [2022-11-26 00:58:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:10,032 INFO L495 AbstractCegarLoop]: Abstraction has 21355 states and 34669 transitions. [2022-11-26 00:58:10,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-26 00:58:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 34669 transitions. [2022-11-26 00:58:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-26 00:58:10,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:10,043 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1] [2022-11-26 00:58:10,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:10,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:10,244 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -251274282, now seen corresponding path program 1 times [2022-11-26 00:58:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:10,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664885323] [2022-11-26 00:58:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 00:58:10,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:10,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664885323] [2022-11-26 00:58:10,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664885323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:10,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:10,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:58:10,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055829519] [2022-11-26 00:58:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:10,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:58:10,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:58:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:10,467 INFO L87 Difference]: Start difference. First operand 21355 states and 34669 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 00:58:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:12,736 INFO L93 Difference]: Finished difference Result 41924 states and 69541 transitions. [2022-11-26 00:58:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:58:12,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-26 00:58:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:12,895 INFO L225 Difference]: With dead ends: 41924 [2022-11-26 00:58:12,895 INFO L226 Difference]: Without dead ends: 21660 [2022-11-26 00:58:13,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:13,086 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:13,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2199 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:58:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21660 states. [2022-11-26 00:58:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21660 to 21458. [2022-11-26 00:58:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21458 states, 14295 states have (on average 1.456593214410633) internal successors, (20822), 15661 states have internal predecessors, (20822), 5661 states have call successors, (5661), 1303 states have call predecessors, (5661), 1501 states have return successors, (8328), 5244 states have call predecessors, (8328), 5625 states have call successors, (8328) [2022-11-26 00:58:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21458 states to 21458 states and 34811 transitions. [2022-11-26 00:58:15,391 INFO L78 Accepts]: Start accepts. Automaton has 21458 states and 34811 transitions. Word has length 146 [2022-11-26 00:58:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:15,391 INFO L495 AbstractCegarLoop]: Abstraction has 21458 states and 34811 transitions. [2022-11-26 00:58:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 00:58:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 21458 states and 34811 transitions. [2022-11-26 00:58:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-26 00:58:15,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:15,399 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:15,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:58:15,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1668564539, now seen corresponding path program 1 times [2022-11-26 00:58:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928588519] [2022-11-26 00:58:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 00:58:16,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:16,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928588519] [2022-11-26 00:58:16,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928588519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:16,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697986390] [2022-11-26 00:58:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:16,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:16,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:16,523 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:16,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:58:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:16,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:58:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:58:17,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:58:17,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697986390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559194226] [2022-11-26 00:58:17,687 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-11-26 00:58:17,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:17,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:17,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:17,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:23,625 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 663 for LOIs [2022-11-26 00:58:32,222 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 26 for LOIs [2022-11-26 00:58:32,223 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 39 for LOIs [2022-11-26 00:58:32,397 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 61 for LOIs [2022-11-26 00:58:32,411 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 48 for LOIs [2022-11-26 00:58:32,425 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-11-26 00:58:34,555 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-11-26 00:58:34,757 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-11-26 00:58:34,818 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 54 for LOIs [2022-11-26 00:58:34,832 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 71 for LOIs [2022-11-26 00:58:34,847 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-11-26 00:58:38,574 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:58:39,171 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:58:39,311 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:12,764 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:20,248 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:29,426 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:43,075 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 663 DAG size of output: 565 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:50,643 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 662 DAG size of output: 570 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:00:17,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '919603#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:17,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:17,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 10] total 29 [2022-11-26 01:00:17,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231181264] [2022-11-26 01:00:17,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:17,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 01:00:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 01:00:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=10918, Unknown=0, NotChecked=0, Total=11772 [2022-11-26 01:00:17,817 INFO L87 Difference]: Start difference. First operand 21458 states and 34811 transitions. Second operand has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-11-26 01:00:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:41,961 INFO L93 Difference]: Finished difference Result 62377 states and 108382 transitions. [2022-11-26 01:00:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-26 01:00:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) Word has length 146 [2022-11-26 01:00:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:42,269 INFO L225 Difference]: With dead ends: 62377 [2022-11-26 01:00:42,270 INFO L226 Difference]: Without dead ends: 41836 [2022-11-26 01:00:42,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 375 SyntacticMatches, 7 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16759 ImplicationChecksByTransitivity, 102.0s TimeCoverageRelationStatistics Valid=3338, Invalid=37264, Unknown=0, NotChecked=0, Total=40602 [2022-11-26 01:00:42,529 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 7767 mSDsluCounter, 5973 mSDsCounter, 0 mSdLazyCounter, 19019 mSolverCounterSat, 5942 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7767 SdHoareTripleChecker+Valid, 6499 SdHoareTripleChecker+Invalid, 24961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5942 IncrementalHoareTripleChecker+Valid, 19019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:42,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7767 Valid, 6499 Invalid, 24961 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5942 Valid, 19019 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2022-11-26 01:00:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41836 states. [2022-11-26 01:00:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41836 to 37374. [2022-11-26 01:00:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37374 states, 24981 states have (on average 1.4370121292182059) internal successors, (35898), 27287 states have internal predecessors, (35898), 9646 states have call successors, (9646), 2376 states have call predecessors, (9646), 2746 states have return successors, (16029), 8985 states have call predecessors, (16029), 9588 states have call successors, (16029) [2022-11-26 01:00:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37374 states to 37374 states and 61573 transitions. [2022-11-26 01:00:47,289 INFO L78 Accepts]: Start accepts. Automaton has 37374 states and 61573 transitions. Word has length 146 [2022-11-26 01:00:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:47,290 INFO L495 AbstractCegarLoop]: Abstraction has 37374 states and 61573 transitions. [2022-11-26 01:00:47,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-11-26 01:00:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 37374 states and 61573 transitions. [2022-11-26 01:00:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-26 01:00:47,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:47,296 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:47,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:47,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 01:00:47,497 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1588277853, now seen corresponding path program 1 times [2022-11-26 01:00:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:47,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031041620] [2022-11-26 01:00:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:47,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 01:00:47,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031041620] [2022-11-26 01:00:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031041620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524046166] [2022-11-26 01:00:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:47,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:47,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:47,944 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:47,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c9d04e-dfe9-4a39-8222-4e84e478a228/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 01:00:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:48,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:00:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 01:00:48,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524046166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:48,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:00:48,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-11-26 01:00:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095284463] [2022-11-26 01:00:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:48,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:00:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:00:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:00:48,399 INFO L87 Difference]: Start difference. First operand 37374 states and 61573 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-26 01:00:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:54,399 INFO L93 Difference]: Finished difference Result 74035 states and 125345 transitions. [2022-11-26 01:00:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:00:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 156 [2022-11-26 01:00:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:54,705 INFO L225 Difference]: With dead ends: 74035 [2022-11-26 01:00:54,705 INFO L226 Difference]: Without dead ends: 37760 [2022-11-26 01:00:55,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:00:55,301 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 461 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:55,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 2728 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:00:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37760 states.