./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.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_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/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_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/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_c6929ca3-5f68-44a3-86d9-59a67453b7bc/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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:36:00,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:36:00,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:36:00,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:36:00,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:36:00,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:36:00,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:36:00,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:36:00,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:36:00,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:36:00,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:36:00,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:36:00,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:36:00,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:36:00,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:36:00,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:36:00,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:36:00,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:36:00,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:36:00,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:36:00,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:36:00,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:36:00,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:36:00,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:36:00,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:36:00,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:36:00,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:36:00,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:36:00,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:36:00,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:36:00,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:36:00,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:36:00,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:36:00,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:36:00,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:36:00,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:36:00,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:36:00,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:36:00,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:36:00,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:36:00,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:36:00,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:36:00,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:36:00,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:36:00,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:36:00,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:36:00,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:36:00,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:36:00,727 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:36:00,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:36:00,728 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:36:00,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:36:00,728 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:36:00,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:36:00,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:36:00,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:36:00,729 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:36:00,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:36:00,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:36:00,730 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:36:00,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:36:00,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:36:00,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:36:00,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:36:00,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:36:00,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:36:00,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:36:00,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:36:00,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:36:00,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:36:00,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:36:00,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:36:00,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:36:00,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:36:00,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:36:00,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:36:00,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:36:00,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:36:00,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:36:00,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:36:00,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:36:00,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:36:00,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:36:00,735 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_c6929ca3-5f68-44a3-86d9-59a67453b7bc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2022-11-25 23:36:00,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:36:01,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:36:01,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:36:01,026 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:36:01,026 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:36:01,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2022-11-25 23:36:04,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:36:04,553 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:36:04,554 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2022-11-25 23:36:04,573 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/data/050df0e25/b6929a4d66074e9c8b58e294f32de488/FLAG1034358c0 [2022-11-25 23:36:04,588 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/data/050df0e25/b6929a4d66074e9c8b58e294f32de488 [2022-11-25 23:36:04,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:36:04,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:36:04,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:36:04,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:36:04,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:36:04,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:36:04" (1/1) ... [2022-11-25 23:36:04,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5947ea8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:04, skipping insertion in model container [2022-11-25 23:36:04,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:36:04" (1/1) ... [2022-11-25 23:36:04,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:36:04,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:36:04,889 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_c6929ca3-5f68-44a3-86d9-59a67453b7bc/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2022-11-25 23:36:05,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:36:05,264 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:36:05,294 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_c6929ca3-5f68-44a3-86d9-59a67453b7bc/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2022-11-25 23:36:05,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:36:05,476 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:36:05,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05 WrapperNode [2022-11-25 23:36:05,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:36:05,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:36:05,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:36:05,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:36:05,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,588 INFO L138 Inliner]: procedures = 93, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 894 [2022-11-25 23:36:05,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:36:05,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:36:05,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:36:05,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:36:05,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,671 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:36:05,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:36:05,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:36:05,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:36:05,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (1/1) ... [2022-11-25 23:36:05,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:36:05,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:05,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:36:05,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:36:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-25 23:36:05,786 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-25 23:36:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:36:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 23:36:05,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 23:36:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-25 23:36:05,787 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-25 23:36:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 23:36:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 23:36:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 23:36:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 23:36:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 23:36:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 23:36:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 23:36:05,789 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 23:36:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 23:36:05,789 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 23:36:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 23:36:05,790 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 23:36:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-25 23:36:05,790 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-25 23:36:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 23:36:05,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 23:36:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 23:36:05,792 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 23:36:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 23:36:05,793 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 23:36:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 23:36:05,793 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 23:36:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 23:36:05,795 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 23:36:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 23:36:05,795 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 23:36:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 23:36:05,796 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 23:36:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 23:36:05,796 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 23:36:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 23:36:05,796 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 23:36:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 23:36:05,797 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 23:36:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:36:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 23:36:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 23:36:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 23:36:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 23:36:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 23:36:05,799 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 23:36:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 23:36:05,800 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 23:36:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:36:05,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:36:05,801 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 23:36:05,801 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 23:36:06,008 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:36:06,010 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:36:07,439 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:36:08,306 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:36:08,307 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:36:08,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:36:08 BoogieIcfgContainer [2022-11-25 23:36:08,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:36:08,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:36:08,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:36:08,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:36:08,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:36:04" (1/3) ... [2022-11-25 23:36:08,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b7d51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:36:08, skipping insertion in model container [2022-11-25 23:36:08,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:36:05" (2/3) ... [2022-11-25 23:36:08,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b7d51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:36:08, skipping insertion in model container [2022-11-25 23:36:08,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:36:08" (3/3) ... [2022-11-25 23:36:08,327 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2022-11-25 23:36:08,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:36:08,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:36:08,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:36:08,445 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;@1193a75a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:36:08,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:36:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-25 23:36:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 23:36:08,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:08,497 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, 1] [2022-11-25 23:36:08,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1730455560, now seen corresponding path program 1 times [2022-11-25 23:36:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:08,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516741605] [2022-11-25 23:36:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:36:09,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516741605] [2022-11-25 23:36:09,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516741605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:09,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:09,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:36:09,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822288766] [2022-11-25 23:36:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:36:09,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:36:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:36:09,700 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 23:36:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:10,291 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2022-11-25 23:36:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:36:10,294 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), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-11-25 23:36:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:10,311 INFO L225 Difference]: With dead ends: 851 [2022-11-25 23:36:10,311 INFO L226 Difference]: Without dead ends: 490 [2022-11-25 23:36:10,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:10,322 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 282 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:10,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2351 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:36:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-25 23:36:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2022-11-25 23:36:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-25 23:36:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2022-11-25 23:36:10,403 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2022-11-25 23:36:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:10,404 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2022-11-25 23:36:10,404 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), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-25 23:36:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2022-11-25 23:36:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 23:36:10,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:10,409 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] [2022-11-25 23:36:10,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:36:10,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1940037977, now seen corresponding path program 1 times [2022-11-25 23:36:10,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:10,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238026271] [2022-11-25 23:36:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:36:11,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238026271] [2022-11-25 23:36:11,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238026271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:11,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:11,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 23:36:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41958325] [2022-11-25 23:36:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:11,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:36:11,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:36:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:36:11,057 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 23:36:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:14,779 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2022-11-25 23:36:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:36:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2022-11-25 23:36:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:14,787 INFO L225 Difference]: With dead ends: 1287 [2022-11-25 23:36:14,788 INFO L226 Difference]: Without dead ends: 930 [2022-11-25 23:36:14,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:36:14,791 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 1740 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 3981 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 4574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 3981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:14,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 2530 Invalid, 4574 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [593 Valid, 3981 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 23:36:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-25 23:36:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2022-11-25 23:36:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2022-11-25 23:36:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2022-11-25 23:36:14,873 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2022-11-25 23:36:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:14,874 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2022-11-25 23:36:14,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 23:36:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2022-11-25 23:36:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 23:36:14,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:14,883 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, 1, 1, 1, 1] [2022-11-25 23:36:14,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:36:14,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1999918314, now seen corresponding path program 1 times [2022-11-25 23:36:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219387173] [2022-11-25 23:36:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:36:15,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219387173] [2022-11-25 23:36:15,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219387173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:15,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:15,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:36:15,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114148166] [2022-11-25 23:36:15,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:15,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:36:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:36:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:15,353 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 23:36:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:15,635 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2022-11-25 23:36:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:36:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-25 23:36:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:15,647 INFO L225 Difference]: With dead ends: 1477 [2022-11-25 23:36:15,647 INFO L226 Difference]: Without dead ends: 963 [2022-11-25 23:36:15,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:15,656 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:15,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3533 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:36:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-25 23:36:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2022-11-25 23:36:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-25 23:36:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2022-11-25 23:36:15,717 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2022-11-25 23:36:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:15,718 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2022-11-25 23:36:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 23:36:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2022-11-25 23:36:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 23:36:15,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:15,721 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, 1, 1, 1, 1, 1] [2022-11-25 23:36:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:36:15,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337395, now seen corresponding path program 1 times [2022-11-25 23:36:15,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236894561] [2022-11-25 23:36:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:15,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:36:16,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236894561] [2022-11-25 23:36:16,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236894561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:16,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:16,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:36:16,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311062420] [2022-11-25 23:36:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:16,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:36:16,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:36:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:16,098 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 23:36:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:16,371 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2022-11-25 23:36:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:36:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-11-25 23:36:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:16,383 INFO L225 Difference]: With dead ends: 1506 [2022-11-25 23:36:16,383 INFO L226 Difference]: Without dead ends: 978 [2022-11-25 23:36:16,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:16,398 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 41 mSDsluCounter, 2950 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:16,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3557 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:36:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-25 23:36:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2022-11-25 23:36:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2022-11-25 23:36:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2022-11-25 23:36:16,498 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 84 [2022-11-25 23:36:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:16,498 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2022-11-25 23:36:16,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 23:36:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2022-11-25 23:36:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 23:36:16,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:16,502 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, 1, 1, 1, 1, 1] [2022-11-25 23:36:16,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:36:16,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:16,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:16,503 INFO L85 PathProgramCache]: Analyzing trace with hash -56688493, now seen corresponding path program 1 times [2022-11-25 23:36:16,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:16,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059872845] [2022-11-25 23:36:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:16,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:36:18,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059872845] [2022-11-25 23:36:18,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059872845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:18,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:18,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:36:18,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540032170] [2022-11-25 23:36:18,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:18,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:36:18,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:18,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:36:18,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:18,020 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 23:36:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:22,837 INFO L93 Difference]: Finished difference Result 3877 states and 6311 transitions. [2022-11-25 23:36:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:36:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2022-11-25 23:36:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:22,870 INFO L225 Difference]: With dead ends: 3877 [2022-11-25 23:36:22,870 INFO L226 Difference]: Without dead ends: 3003 [2022-11-25 23:36:22,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:36:22,879 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 2212 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 4421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:22,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2319 Valid, 2001 Invalid, 4421 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [956 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-25 23:36:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-11-25 23:36:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2731. [2022-11-25 23:36:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 1919 states have (on average 1.5742574257425743) internal successors, (3021), 2023 states have internal predecessors, (3021), 648 states have call successors, (648), 129 states have call predecessors, (648), 163 states have return successors, (738), 649 states have call predecessors, (738), 643 states have call successors, (738) [2022-11-25 23:36:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4407 transitions. [2022-11-25 23:36:23,231 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4407 transitions. Word has length 84 [2022-11-25 23:36:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:23,232 INFO L495 AbstractCegarLoop]: Abstraction has 2731 states and 4407 transitions. [2022-11-25 23:36:23,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 23:36:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4407 transitions. [2022-11-25 23:36:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 23:36:23,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:23,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:23,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:36:23,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash -866911837, now seen corresponding path program 1 times [2022-11-25 23:36:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258568298] [2022-11-25 23:36:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:36:23,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:23,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258568298] [2022-11-25 23:36:23,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258568298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:23,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:23,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:36:23,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790864643] [2022-11-25 23:36:23,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:23,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:36:23,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:36:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:36:23,653 INFO L87 Difference]: Start difference. First operand 2731 states and 4407 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 23:36:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:26,806 INFO L93 Difference]: Finished difference Result 6167 states and 10005 transitions. [2022-11-25 23:36:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:36:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 90 [2022-11-25 23:36:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:26,840 INFO L225 Difference]: With dead ends: 6167 [2022-11-25 23:36:26,840 INFO L226 Difference]: Without dead ends: 4156 [2022-11-25 23:36:26,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:36:26,853 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 2927 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 1321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3091 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 3561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1321 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:26,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3091 Valid, 1195 Invalid, 3561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1321 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 23:36:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2022-11-25 23:36:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3980. [2022-11-25 23:36:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 2748 states have (on average 1.5334788937409025) internal successors, (4214), 2911 states have internal predecessors, (4214), 973 states have call successors, (973), 211 states have call predecessors, (973), 258 states have return successors, (1132), 963 states have call predecessors, (1132), 968 states have call successors, (1132) [2022-11-25 23:36:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 6319 transitions. [2022-11-25 23:36:27,405 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 6319 transitions. Word has length 90 [2022-11-25 23:36:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:27,405 INFO L495 AbstractCegarLoop]: Abstraction has 3980 states and 6319 transitions. [2022-11-25 23:36:27,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 23:36:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 6319 transitions. [2022-11-25 23:36:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-25 23:36:27,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:27,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:27,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:36:27,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1332034478, now seen corresponding path program 1 times [2022-11-25 23:36:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:27,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416280111] [2022-11-25 23:36:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:36:27,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:27,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416280111] [2022-11-25 23:36:27,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416280111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:27,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:27,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 23:36:27,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239604898] [2022-11-25 23:36:27,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:27,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:36:27,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:36:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:36:27,820 INFO L87 Difference]: Start difference. First operand 3980 states and 6319 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 23:36:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:30,363 INFO L93 Difference]: Finished difference Result 7521 states and 11996 transitions. [2022-11-25 23:36:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:36:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2022-11-25 23:36:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:30,391 INFO L225 Difference]: With dead ends: 7521 [2022-11-25 23:36:30,391 INFO L226 Difference]: Without dead ends: 4486 [2022-11-25 23:36:30,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:36:30,411 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 998 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:30,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 1612 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 23:36:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2022-11-25 23:36:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4061. [2022-11-25 23:36:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 2802 states have (on average 1.5274803711634546) internal successors, (4280), 2977 states have internal predecessors, (4280), 976 states have call successors, (976), 226 states have call predecessors, (976), 282 states have return successors, (1166), 963 states have call predecessors, (1166), 971 states have call successors, (1166) [2022-11-25 23:36:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 6422 transitions. [2022-11-25 23:36:30,954 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 6422 transitions. Word has length 92 [2022-11-25 23:36:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:30,955 INFO L495 AbstractCegarLoop]: Abstraction has 4061 states and 6422 transitions. [2022-11-25 23:36:30,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 23:36:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 6422 transitions. [2022-11-25 23:36:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 23:36:30,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:30,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:36:30,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash 47364347, now seen corresponding path program 1 times [2022-11-25 23:36:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637183776] [2022-11-25 23:36:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:36:31,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:31,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637183776] [2022-11-25 23:36:31,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637183776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:31,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:31,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:36:31,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464415620] [2022-11-25 23:36:31,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:31,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:36:31,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:31,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:36:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:36:31,362 INFO L87 Difference]: Start difference. First operand 4061 states and 6422 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:36:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:32,194 INFO L93 Difference]: Finished difference Result 4165 states and 6584 transitions. [2022-11-25 23:36:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:36:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-11-25 23:36:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:32,220 INFO L225 Difference]: With dead ends: 4165 [2022-11-25 23:36:32,221 INFO L226 Difference]: Without dead ends: 4150 [2022-11-25 23:36:32,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:36:32,224 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 684 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:32,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1471 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:36:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-25 23:36:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 4067. [2022-11-25 23:36:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4067 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2983 states have internal predecessors, (4286), 976 states have call successors, (976), 226 states have call predecessors, (976), 282 states have return successors, (1166), 963 states have call predecessors, (1166), 971 states have call successors, (1166) [2022-11-25 23:36:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4067 states to 4067 states and 6428 transitions. [2022-11-25 23:36:32,777 INFO L78 Accepts]: Start accepts. Automaton has 4067 states and 6428 transitions. Word has length 97 [2022-11-25 23:36:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:32,778 INFO L495 AbstractCegarLoop]: Abstraction has 4067 states and 6428 transitions. [2022-11-25 23:36:32,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-25 23:36:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4067 states and 6428 transitions. [2022-11-25 23:36:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-25 23:36:32,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:32,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:32,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:36:32,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1289942680, now seen corresponding path program 1 times [2022-11-25 23:36:32,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:32,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529943735] [2022-11-25 23:36:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:32,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:36:33,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529943735] [2022-11-25 23:36:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529943735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:33,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 23:36:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684086035] [2022-11-25 23:36:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:33,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:36:33,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:36:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:36:33,182 INFO L87 Difference]: Start difference. First operand 4067 states and 6428 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-25 23:36:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:34,060 INFO L93 Difference]: Finished difference Result 7620 states and 12200 transitions. [2022-11-25 23:36:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:36:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2022-11-25 23:36:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:34,101 INFO L225 Difference]: With dead ends: 7620 [2022-11-25 23:36:34,101 INFO L226 Difference]: Without dead ends: 4277 [2022-11-25 23:36:34,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:36:34,120 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 360 mSDsluCounter, 3512 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 4048 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:34,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 4048 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:36:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2022-11-25 23:36:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4267. [2022-11-25 23:36:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 2994 states have (on average 1.5050100200400802) internal successors, (4506), 3173 states have internal predecessors, (4506), 981 states have call successors, (981), 231 states have call predecessors, (981), 291 states have return successors, (1169), 968 states have call predecessors, (1169), 976 states have call successors, (1169) [2022-11-25 23:36:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6656 transitions. [2022-11-25 23:36:34,797 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6656 transitions. Word has length 101 [2022-11-25 23:36:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:34,798 INFO L495 AbstractCegarLoop]: Abstraction has 4267 states and 6656 transitions. [2022-11-25 23:36:34,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-25 23:36:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6656 transitions. [2022-11-25 23:36:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 23:36:34,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:34,806 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:36:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:36:34,806 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2022153961, now seen corresponding path program 1 times [2022-11-25 23:36:34,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:34,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916141246] [2022-11-25 23:36:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:34,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:36:35,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:35,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916141246] [2022-11-25 23:36:35,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916141246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:36:35,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:36:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:36:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109818936] [2022-11-25 23:36:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:36:35,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:36:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:36:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:36:35,497 INFO L87 Difference]: Start difference. First operand 4267 states and 6656 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-25 23:36:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:40,299 INFO L93 Difference]: Finished difference Result 15216 states and 24034 transitions. [2022-11-25 23:36:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:36:40,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 109 [2022-11-25 23:36:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:40,366 INFO L225 Difference]: With dead ends: 15216 [2022-11-25 23:36:40,366 INFO L226 Difference]: Without dead ends: 10972 [2022-11-25 23:36:40,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:36:40,386 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 2155 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 3036 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:40,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2219 Valid, 1655 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3036 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 23:36:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2022-11-25 23:36:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 9698. [2022-11-25 23:36:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9698 states, 6831 states have (on average 1.515590689503733) internal successors, (10353), 7235 states have internal predecessors, (10353), 2236 states have call successors, (2236), 497 states have call predecessors, (2236), 630 states have return successors, (2653), 2117 states have call predecessors, (2653), 2231 states have call successors, (2653) [2022-11-25 23:36:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9698 states to 9698 states and 15242 transitions. [2022-11-25 23:36:41,774 INFO L78 Accepts]: Start accepts. Automaton has 9698 states and 15242 transitions. Word has length 109 [2022-11-25 23:36:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:41,775 INFO L495 AbstractCegarLoop]: Abstraction has 9698 states and 15242 transitions. [2022-11-25 23:36:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-25 23:36:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9698 states and 15242 transitions. [2022-11-25 23:36:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-25 23:36:41,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:41,780 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 23:36:41,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:36:41,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash -834580586, now seen corresponding path program 1 times [2022-11-25 23:36:41,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:41,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667235892] [2022-11-25 23:36:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:41,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:36:43,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667235892] [2022-11-25 23:36:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667235892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207093846] [2022-11-25 23:36:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:43,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:43,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:43,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6929ca3-5f68-44a3-86d9-59a67453b7bc/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:36:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:36:44,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:36:46,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:36:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207093846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939752997] [2022-11-25 23:36:49,886 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-25 23:36:49,887 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:49,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:49,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:49,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:57,333 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2022-11-25 23:38:00,362 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-25 23:38:07,934 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2022-11-25 23:38:08,449 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2022-11-25 23:38:08,465 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 116 for LOIs [2022-11-25 23:38:08,982 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2022-11-25 23:38:08,989 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 105 for LOIs [2022-11-25 23:38:08,999 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2022-11-25 23:38:12,587 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-11-25 23:38:12,853 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2022-11-25 23:38:13,173 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2022-11-25 23:38:13,178 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2022-11-25 23:38:15,792 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs