./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW --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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- 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-4e7fbc6 [2022-11-23 16:11:35,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:11:35,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:11:35,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:11:35,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:11:35,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:11:35,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:11:35,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:11:35,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:11:35,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:11:35,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:11:35,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:11:35,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:11:35,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:11:35,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:11:35,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:11:35,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:11:35,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:11:35,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:11:35,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:11:35,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:11:35,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:11:35,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:11:35,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:11:35,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:11:35,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:11:35,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:11:35,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:11:35,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:11:35,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:11:35,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:11:35,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:11:35,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:11:35,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:11:35,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:11:35,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:11:35,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:11:35,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:11:35,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:11:35,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:11:35,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:11:35,746 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:11:35,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:11:35,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:11:35,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:11:35,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:11:35,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:11:35,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:11:35,771 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:11:35,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:11:35,771 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:11:35,772 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:11:35,772 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:11:35,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:11:35,772 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:11:35,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:11:35,773 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:11:35,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:11:35,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:11:35,774 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:11:35,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:11:35,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:11:35,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:11:35,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:11:35,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:11:35,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:11:35,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:11:35,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:11:35,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:11:35,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:11:35,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:11:35,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:11:35,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:11:35,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:11:35,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:11:35,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:11:35,779 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:11:35,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:11:35,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:11:35,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:11:35,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:11:35,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:11:35,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:11:35,781 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_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2022-11-23 16:11:36,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:11:36,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:11:36,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:11:36,047 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:11:36,048 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:11:36,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2022-11-23 16:11:39,201 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:11:39,527 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:11:39,535 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2022-11-23 16:11:39,560 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/data/5eaa7e578/129e944547f14d998ce0b207a9fafafc/FLAG3a6734fb5 [2022-11-23 16:11:39,580 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/data/5eaa7e578/129e944547f14d998ce0b207a9fafafc [2022-11-23 16:11:39,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:11:39,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:11:39,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:39,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:11:39,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:11:39,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:39" (1/1) ... [2022-11-23 16:11:39,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5092496e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:39, skipping insertion in model container [2022-11-23 16:11:39,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:39" (1/1) ... [2022-11-23 16:11:39,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:11:39,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:11:40,183 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_3180722a-6e41-4615-bab0-e1dbeef3231d/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2022-11-23 16:11:40,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:40,346 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:11:40,479 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_3180722a-6e41-4615-bab0-e1dbeef3231d/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2022-11-23 16:11:40,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:40,528 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:11:40,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40 WrapperNode [2022-11-23 16:11:40,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:40,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:11:40,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:11:40,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:11:40,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,665 INFO L138 Inliner]: procedures = 91, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 862 [2022-11-23 16:11:40,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:11:40,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:11:40,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:11:40,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:11:40,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,766 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:11:40,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:11:40,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:11:40,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:11:40,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (1/1) ... [2022-11-23 16:11:40,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:11:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:40,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:11:40,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:11:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-23 16:11:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-23 16:11:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:11:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-23 16:11:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-23 16:11:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 16:11:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 16:11:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-23 16:11:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-23 16:11:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 16:11:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 16:11:40,902 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 16:11:40,902 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 16:11:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-23 16:11:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-23 16:11:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 16:11:40,903 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 16:11:40,903 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 16:11:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 16:11:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 16:11:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 16:11:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 16:11:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 16:11:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 16:11:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 16:11:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 16:11:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 16:11:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 16:11:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 16:11:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 16:11:40,918 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 16:11:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 16:11:40,919 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 16:11:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 16:11:40,919 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 16:11:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 16:11:40,920 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 16:11:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 16:11:40,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 16:11:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 16:11:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 16:11:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:11:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 16:11:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 16:11:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 16:11:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 16:11:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 16:11:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 16:11:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 16:11:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 16:11:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:11:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:11:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 16:11:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 16:11:41,121 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:11:41,124 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:11:42,507 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:11:43,333 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:11:43,333 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 16:11:43,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:11:43 BoogieIcfgContainer [2022-11-23 16:11:43,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:11:43,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:11:43,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:11:43,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:11:43,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:11:39" (1/3) ... [2022-11-23 16:11:43,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f52479e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:11:43, skipping insertion in model container [2022-11-23 16:11:43,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:40" (2/3) ... [2022-11-23 16:11:43,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f52479e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:11:43, skipping insertion in model container [2022-11-23 16:11:43,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:11:43" (3/3) ... [2022-11-23 16:11:43,354 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2022-11-23 16:11:43,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:11:43,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:11:43,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:11:43,472 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;@f29bfea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:11:43,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:11:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-23 16:11:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 16:11:43,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:43,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:43,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1819455823, now seen corresponding path program 1 times [2022-11-23 16:11:43,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:43,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212951518] [2022-11-23 16:11:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:43,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:44,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:44,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212951518] [2022-11-23 16:11:44,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212951518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:44,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:44,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 16:11:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564115396] [2022-11-23 16:11:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:44,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:11:44,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:11:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:11:44,668 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 16:11:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:45,687 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2022-11-23 16:11:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 16:11:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-23 16:11:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:45,718 INFO L225 Difference]: With dead ends: 1204 [2022-11-23 16:11:45,719 INFO L226 Difference]: Without dead ends: 800 [2022-11-23 16:11:45,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:11:45,738 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 4449 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:45,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 4449 Invalid, 458 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:11:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-23 16:11:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2022-11-23 16:11:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2022-11-23 16:11:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2022-11-23 16:11:45,872 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2022-11-23 16:11:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:45,873 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2022-11-23 16:11:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 16:11:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2022-11-23 16:11:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 16:11:45,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:45,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:45,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:11:45,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash 307058614, now seen corresponding path program 1 times [2022-11-23 16:11:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:45,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236038692] [2022-11-23 16:11:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:46,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236038692] [2022-11-23 16:11:46,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236038692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:46,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:46,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 16:11:46,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128982825] [2022-11-23 16:11:46,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:46,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:11:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:11:46,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:11:46,326 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 16:11:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:46,636 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2022-11-23 16:11:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:11:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-23 16:11:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:46,647 INFO L225 Difference]: With dead ends: 1219 [2022-11-23 16:11:46,647 INFO L226 Difference]: Without dead ends: 829 [2022-11-23 16:11:46,654 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 [2022-11-23 16:11:46,657 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 32 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3776 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 [2022-11-23 16:11:46,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3776 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:11:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-23 16:11:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2022-11-23 16:11:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2022-11-23 16:11:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2022-11-23 16:11:46,754 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 86 [2022-11-23 16:11:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:46,756 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2022-11-23 16:11:46,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 16:11:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2022-11-23 16:11:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 16:11:46,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:46,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:46,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:11:46,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash -763691551, now seen corresponding path program 1 times [2022-11-23 16:11:46,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:46,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700870311] [2022-11-23 16:11:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:46,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:47,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:47,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700870311] [2022-11-23 16:11:47,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700870311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:47,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:47,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:11:47,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484665905] [2022-11-23 16:11:47,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:47,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:11:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:47,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:11:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:11:47,932 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 16:11:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:49,749 INFO L93 Difference]: Finished difference Result 3105 states and 5034 transitions. [2022-11-23 16:11:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:11:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2022-11-23 16:11:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:49,772 INFO L225 Difference]: With dead ends: 3105 [2022-11-23 16:11:49,773 INFO L226 Difference]: Without dead ends: 2322 [2022-11-23 16:11:49,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:11:49,790 INFO L413 NwaCegarLoop]: 1246 mSDtfsCounter, 1174 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 3103 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:49,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 3103 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 16:11:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-11-23 16:11:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2010. [2022-11-23 16:11:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1459 states have (on average 1.5496915695681974) internal successors, (2261), 1511 states have internal predecessors, (2261), 422 states have call successors, (422), 117 states have call predecessors, (422), 128 states have return successors, (518), 419 states have call predecessors, (518), 414 states have call successors, (518) [2022-11-23 16:11:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3201 transitions. [2022-11-23 16:11:50,005 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3201 transitions. Word has length 87 [2022-11-23 16:11:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:50,006 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 3201 transitions. [2022-11-23 16:11:50,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 16:11:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3201 transitions. [2022-11-23 16:11:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 16:11:50,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:50,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:50,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:11:50,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash -89730047, now seen corresponding path program 1 times [2022-11-23 16:11:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:50,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390665631] [2022-11-23 16:11:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:50,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:50,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390665631] [2022-11-23 16:11:50,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390665631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:50,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:50,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 16:11:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76473456] [2022-11-23 16:11:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:50,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:11:50,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:11:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:11:50,407 INFO L87 Difference]: Start difference. First operand 2010 states and 3201 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), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 16:11:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:50,823 INFO L93 Difference]: Finished difference Result 3142 states and 5038 transitions. [2022-11-23 16:11:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:11:50,829 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), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2022-11-23 16:11:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:50,851 INFO L225 Difference]: With dead ends: 3142 [2022-11-23 16:11:50,852 INFO L226 Difference]: Without dead ends: 2129 [2022-11-23 16:11:50,860 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 [2022-11-23 16:11:50,866 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:50,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3795 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:11:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-11-23 16:11:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2069. [2022-11-23 16:11:51,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1502 states have (on average 1.5459387483355527) internal successors, (2322), 1549 states have internal predecessors, (2322), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 440 states have call predecessors, (559), 426 states have call successors, (559) [2022-11-23 16:11:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3315 transitions. [2022-11-23 16:11:51,062 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3315 transitions. Word has length 87 [2022-11-23 16:11:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:51,063 INFO L495 AbstractCegarLoop]: Abstraction has 2069 states and 3315 transitions. [2022-11-23 16:11:51,063 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), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 16:11:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3315 transitions. [2022-11-23 16:11:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 16:11:51,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:51,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:11:51,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1303691788, now seen corresponding path program 1 times [2022-11-23 16:11:51,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:51,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102317166] [2022-11-23 16:11:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:51,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102317166] [2022-11-23 16:11:51,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102317166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:51,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:51,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:11:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577125199] [2022-11-23 16:11:51,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:51,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:11:51,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:11:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:11:51,374 INFO L87 Difference]: Start difference. First operand 2069 states and 3315 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 16:11:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:52,759 INFO L93 Difference]: Finished difference Result 4534 states and 7324 transitions. [2022-11-23 16:11:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:11:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-11-23 16:11:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:52,783 INFO L225 Difference]: With dead ends: 4534 [2022-11-23 16:11:52,784 INFO L226 Difference]: Without dead ends: 3111 [2022-11-23 16:11:52,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:11:52,802 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:52,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 16:11:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-23 16:11:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2022-11-23 16:11:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2022-11-23 16:11:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2022-11-23 16:11:53,093 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 93 [2022-11-23 16:11:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:53,095 INFO L495 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2022-11-23 16:11:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-23 16:11:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2022-11-23 16:11:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 16:11:53,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:53,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:11:53,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1043313248, now seen corresponding path program 1 times [2022-11-23 16:11:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:53,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768953554] [2022-11-23 16:11:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:53,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:53,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768953554] [2022-11-23 16:11:53,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768953554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:53,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:11:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695923151] [2022-11-23 16:11:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:53,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:11:53,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:11:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:11:53,544 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:11:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:54,415 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2022-11-23 16:11:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:11:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2022-11-23 16:11:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:54,440 INFO L225 Difference]: With dead ends: 5309 [2022-11-23 16:11:54,440 INFO L226 Difference]: Without dead ends: 3111 [2022-11-23 16:11:54,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:11:54,460 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:54,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:11:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-23 16:11:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2022-11-23 16:11:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-23 16:11:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2022-11-23 16:11:54,784 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 96 [2022-11-23 16:11:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:54,785 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2022-11-23 16:11:54,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 16:11:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2022-11-23 16:11:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 16:11:54,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:54,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:54,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:11:54,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -411671538, now seen corresponding path program 1 times [2022-11-23 16:11:54,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:54,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53593531] [2022-11-23 16:11:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 16:11:54,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:54,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53593531] [2022-11-23 16:11:54,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53593531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:54,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153604983] [2022-11-23 16:11:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:54,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:54,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:54,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:54,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:11:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:11:55,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:11:55,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:11:55,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153604983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:55,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:11:55,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-23 16:11:55,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607371936] [2022-11-23 16:11:55,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:55,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:11:55,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:11:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:11:55,411 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:11:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:55,809 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2022-11-23 16:11:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:11:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2022-11-23 16:11:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:55,834 INFO L225 Difference]: With dead ends: 6211 [2022-11-23 16:11:55,834 INFO L226 Difference]: Without dead ends: 3140 [2022-11-23 16:11:55,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:11:55,864 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:55,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:11:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2022-11-23 16:11:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2022-11-23 16:11:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-23 16:11:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2022-11-23 16:11:56,184 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2022-11-23 16:11:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:56,185 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2022-11-23 16:11:56,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:11:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2022-11-23 16:11:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 16:11:56,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:56,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:56,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:56,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:56,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash -52146884, now seen corresponding path program 1 times [2022-11-23 16:11:56,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955029888] [2022-11-23 16:11:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:56,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:11:56,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:56,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955029888] [2022-11-23 16:11:56,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955029888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:56,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110111460] [2022-11-23 16:11:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:56,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:56,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:56,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:11:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:56,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:11:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:11:57,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:11:57,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110111460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:57,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:11:57,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-23 16:11:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915467378] [2022-11-23 16:11:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:11:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:11:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:11:57,016 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:11:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:57,430 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2022-11-23 16:11:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:11:57,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2022-11-23 16:11:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:57,453 INFO L225 Difference]: With dead ends: 6292 [2022-11-23 16:11:57,453 INFO L226 Difference]: Without dead ends: 3131 [2022-11-23 16:11:57,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:11:57,478 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:57,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:11:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-23 16:11:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-11-23 16:11:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-23 16:11:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2022-11-23 16:11:57,747 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 102 [2022-11-23 16:11:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:57,748 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2022-11-23 16:11:57,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:11:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2022-11-23 16:11:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 16:11:57,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:57,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:57,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:57,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:57,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1292378790, now seen corresponding path program 1 times [2022-11-23 16:11:57,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:57,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382457384] [2022-11-23 16:11:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:57,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:11:58,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382457384] [2022-11-23 16:11:58,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382457384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852622071] [2022-11-23 16:11:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:58,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:58,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:58,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:11:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:11:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:11:58,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:11:58,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852622071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:58,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:11:58,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-23 16:11:58,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548459279] [2022-11-23 16:11:58,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:58,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:11:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:11:58,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:11:58,699 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:12:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:00,329 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2022-11-23 16:12:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:12:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2022-11-23 16:12:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:00,373 INFO L225 Difference]: With dead ends: 8109 [2022-11-23 16:12:00,373 INFO L226 Difference]: Without dead ends: 4993 [2022-11-23 16:12:00,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:12:00,399 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 623 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:00,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 2002 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 16:12:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-11-23 16:12:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2022-11-23 16:12:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2022-11-23 16:12:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2022-11-23 16:12:00,881 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 103 [2022-11-23 16:12:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:00,882 INFO L495 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2022-11-23 16:12:00,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:12:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2022-11-23 16:12:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 16:12:00,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:00,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:00,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:01,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1095052512, now seen corresponding path program 1 times [2022-11-23 16:12:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854781768] [2022-11-23 16:12:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:01,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:12:01,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:01,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854781768] [2022-11-23 16:12:01,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854781768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:01,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830758562] [2022-11-23 16:12:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:01,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:01,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:01,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:12:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:12:01,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:12:01,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:01,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830758562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:01,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:12:01,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-23 16:12:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836504062] [2022-11-23 16:12:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:12:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:12:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:12:01,962 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:12:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:03,383 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2022-11-23 16:12:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:12:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2022-11-23 16:12:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:03,429 INFO L225 Difference]: With dead ends: 11020 [2022-11-23 16:12:03,429 INFO L226 Difference]: Without dead ends: 6104 [2022-11-23 16:12:03,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:12:03,457 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 701 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:03,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 3257 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:12:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-11-23 16:12:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2022-11-23 16:12:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2022-11-23 16:12:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2022-11-23 16:12:04,020 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 103 [2022-11-23 16:12:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:04,021 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2022-11-23 16:12:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 16:12:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2022-11-23 16:12:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 16:12:04,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:04,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:04,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:04,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 16:12:04,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2008991990, now seen corresponding path program 1 times [2022-11-23 16:12:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:04,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907311051] [2022-11-23 16:12:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:12:04,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907311051] [2022-11-23 16:12:04,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907311051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040343633] [2022-11-23 16:12:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:04,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:04,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:04,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:12:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:12:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 16:12:04,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:04,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040343633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:04,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:12:04,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-23 16:12:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144483611] [2022-11-23 16:12:04,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:12:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:12:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:12:04,822 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:12:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:05,466 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2022-11-23 16:12:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:12:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2022-11-23 16:12:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:05,517 INFO L225 Difference]: With dead ends: 11905 [2022-11-23 16:12:05,517 INFO L226 Difference]: Without dead ends: 5678 [2022-11-23 16:12:05,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:12:05,582 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 4 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:05,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1771 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-11-23 16:12:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2022-11-23 16:12:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2022-11-23 16:12:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2022-11-23 16:12:06,303 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 108 [2022-11-23 16:12:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:06,304 INFO L495 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2022-11-23 16:12:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:12:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2022-11-23 16:12:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 16:12:06,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:06,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:06,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 16:12:06,522 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2048400244, now seen corresponding path program 1 times [2022-11-23 16:12:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:06,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138680412] [2022-11-23 16:12:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:06,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 16:12:06,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138680412] [2022-11-23 16:12:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138680412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968000927] [2022-11-23 16:12:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:06,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:06,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:12:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:12:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:12:07,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:12:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968000927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4875359] [2022-11-23 16:12:07,537 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2022-11-23 16:12:07,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:07,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:07,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:07,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:14,715 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-23 16:12:16,587 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-23 16:12:16,655 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-23 16:12:19,521 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-23 16:12:31,750 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-23 16:12:32,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:44,087 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:12:51,550 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:13:10,513 WARN L233 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:13:27,648 WARN L233 SmtUtils]: Spent 16.63s on a formula simplification. DAG size of input: 862 DAG size of output: 773 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:13:59,875 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:14:05,868 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 621 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:14:05,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [4875359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:14:05,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:14:05,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2022-11-23 16:14:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462853285] [2022-11-23 16:14:05,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:14:05,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 16:14:05,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:14:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 16:14:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-11-23 16:14:05,878 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-23 16:14:21,856 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 679 DAG size of output: 547 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:14:32,414 WARN L233 SmtUtils]: Spent 10.21s on a formula simplification. DAG size of input: 773 DAG size of output: 559 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:14:38,084 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:15:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:06,538 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2022-11-23 16:15:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 16:15:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2022-11-23 16:15:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:06,576 INFO L225 Difference]: With dead ends: 10981 [2022-11-23 16:15:06,576 INFO L226 Difference]: Without dead ends: 5525 [2022-11-23 16:15:06,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 124.2s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 16:15:06,629 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 40 mSDsluCounter, 2878 mSDsCounter, 0 mSdLazyCounter, 3947 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:06,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3502 Invalid, 3961 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 3947 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2022-11-23 16:15:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2022-11-23 16:15:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2022-11-23 16:15:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2022-11-23 16:15:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2022-11-23 16:15:07,222 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 111 [2022-11-23 16:15:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:07,223 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2022-11-23 16:15:07,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-23 16:15:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2022-11-23 16:15:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 16:15:07,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:07,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:07,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:07,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:07,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:15:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash -462717573, now seen corresponding path program 1 times [2022-11-23 16:15:07,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:15:07,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561091400] [2022-11-23 16:15:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:07,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:15:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 16:15:07,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:15:07,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561091400] [2022-11-23 16:15:07,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561091400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:15:07,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:15:07,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:15:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147037354] [2022-11-23 16:15:07,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:15:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:15:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:15:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:15:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:15:07,710 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:15:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:08,679 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2022-11-23 16:15:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:15:08,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2022-11-23 16:15:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:08,725 INFO L225 Difference]: With dead ends: 11386 [2022-11-23 16:15:08,725 INFO L226 Difference]: Without dead ends: 6539 [2022-11-23 16:15:08,781 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 [2022-11-23 16:15:08,782 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 252 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:08,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2567 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:15:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-11-23 16:15:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2022-11-23 16:15:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2022-11-23 16:15:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2022-11-23 16:15:09,461 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 112 [2022-11-23 16:15:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:09,461 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2022-11-23 16:15:09,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 16:15:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2022-11-23 16:15:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 16:15:09,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:09,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:15:09,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:15:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1428077247, now seen corresponding path program 1 times [2022-11-23 16:15:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:15:09,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909397574] [2022-11-23 16:15:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:15:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 16:15:09,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:15:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909397574] [2022-11-23 16:15:09,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909397574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:15:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418409129] [2022-11-23 16:15:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:15:09,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:15:09,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3180722a-6e41-4615-bab0-e1dbeef3231d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:15:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:15:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 16:15:10,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:15:10,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418409129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337147857] [2022-11-23 16:15:10,362 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-11-23 16:15:10,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:15:10,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:15:10,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:15:10,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:15:14,668 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-23 16:16:54,183 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-11-23 16:16:55,341 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-11-23 16:16:55,443 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 464 for LOIs [2022-11-23 16:16:57,929 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 526 for LOIs [2022-11-23 16:16:58,288 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 104 for LOIs [2022-11-23 16:16:58,680 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 96 for LOIs [2022-11-23 16:16:58,691 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-23 16:16:58,763 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-23 16:17:01,290 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-23 16:23:15,848 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-23 16:23:16,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:23:28,716 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:23:36,483 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:23:56,793 WARN L233 SmtUtils]: Spent 10.71s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:24:50,746 WARN L233 SmtUtils]: Spent 49.11s on a formula simplification. DAG size of input: 1409 DAG size of output: 630 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:25:02,949 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 546 DAG size of output: 543 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:25:27,898 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:25:35,165 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 619 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:25:47,876 WARN L233 SmtUtils]: Spent 11.69s on a formula simplification. DAG size of input: 526 DAG size of output: 445 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)