./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:57:02,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:57:02,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:57:02,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:57:02,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:57:02,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:57:02,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:57:02,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:57:02,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:57:02,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:57:02,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:57:02,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:57:02,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:57:02,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:57:02,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:57:02,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:57:02,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:57:02,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:57:02,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:57:02,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:57:02,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:57:02,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:57:02,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:57:02,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:57:02,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:57:02,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:57:02,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:57:02,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:57:02,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:57:02,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:57:02,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:57:02,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:57:02,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:57:02,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:57:02,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:57:02,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:57:02,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:57:02,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:57:02,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:57:02,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:57:02,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:57:02,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:57:02,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:57:02,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:57:02,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:57:02,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:57:02,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:57:02,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:57:02,789 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:57:02,789 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:57:02,789 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:57:02,789 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:57:02,789 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:57:02,790 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:57:02,790 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:57:02,790 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:57:02,790 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:57:02,790 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:57:02,791 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:57:02,791 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:57:02,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:57:02,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:57:02,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:57:02,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:57:02,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:57:02,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:57:02,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:57:02,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:57:02,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:57:02,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:57:02,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:57:02,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:57:02,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:57:02,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:57:02,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:57:02,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:57:02,794 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:57:02,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:57:02,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:57:02,795 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:57:02,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:57:02,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:57:02,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:57:02,796 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_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2022-11-26 00:57:03,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:57:03,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:57:03,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:57:03,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:57:03,150 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:57:03,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-26 00:57:06,230 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:57:06,621 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:57:06,621 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2022-11-26 00:57:06,653 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/data/782fee084/351d4f9c950f4fc98c19208262e4dd9d/FLAGc196f4b8d [2022-11-26 00:57:06,675 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/data/782fee084/351d4f9c950f4fc98c19208262e4dd9d [2022-11-26 00:57:06,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:57:06,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:57:06,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:57:06,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:57:06,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:57:06,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:57:06" (1/1) ... [2022-11-26 00:57:06,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b90ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:06, skipping insertion in model container [2022-11-26 00:57:06,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:57:06" (1/1) ... [2022-11-26 00:57:06,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:57:06,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:57:06,941 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_fff7a985-fd5b-4424-83cd-9d8de3fdf757/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-26 00:57:07,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:57:07,364 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:57:07,381 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_fff7a985-fd5b-4424-83cd-9d8de3fdf757/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2022-11-26 00:57:07,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:57:07,519 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:57:07,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07 WrapperNode [2022-11-26 00:57:07,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:57:07,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:57:07,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:57:07,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:57:07,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,628 INFO L138 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1095 [2022-11-26 00:57:07,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:57:07,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:57:07,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:57:07,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:57:07,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:57:07,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:57:07,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:57:07,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:57:07,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (1/1) ... [2022-11-26 00:57:07,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:57:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:07,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:57:07,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:57:07,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:57:07,837 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 00:57:07,837 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 00:57:07,837 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:57:07,837 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:57:07,837 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:57:07,837 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:57:07,838 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:57:07,838 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:57:07,838 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:57:07,838 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:57:07,838 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 00:57:07,838 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 00:57:07,839 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:57:07,839 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:57:07,839 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:57:07,839 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:57:07,839 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:57:07,839 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:57:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:57:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:57:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:57:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:57:07,840 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:57:07,840 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:57:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:57:07,841 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:57:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:57:07,841 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:57:07,841 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-26 00:57:07,841 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-26 00:57:07,842 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:57:07,842 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:57:07,842 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:57:07,842 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:57:07,842 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:57:07,843 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:57:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:57:07,843 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:57:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:57:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:57:07,843 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:57:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:57:07,844 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:57:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:57:07,844 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:57:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:57:07,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:57:07,845 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:57:07,845 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:57:08,000 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:57:08,003 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:57:09,232 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:57:10,065 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:57:10,065 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:57:10,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:57:10 BoogieIcfgContainer [2022-11-26 00:57:10,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:57:10,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:57:10,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:57:10,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:57:10,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:57:06" (1/3) ... [2022-11-26 00:57:10,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a31a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:57:10, skipping insertion in model container [2022-11-26 00:57:10,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:57:07" (2/3) ... [2022-11-26 00:57:10,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a31a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:57:10, skipping insertion in model container [2022-11-26 00:57:10,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:57:10" (3/3) ... [2022-11-26 00:57:10,084 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2022-11-26 00:57:10,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:57:10,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:57:10,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:57:10,193 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;@500da338, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:57:10,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:57:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-26 00:57:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:57:10,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:10,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:10,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1884041600, now seen corresponding path program 1 times [2022-11-26 00:57:10,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:10,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761692352] [2022-11-26 00:57:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:10,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:57:11,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761692352] [2022-11-26 00:57:11,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761692352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:11,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:57:11,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:57:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875120421] [2022-11-26 00:57:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:11,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:57:11,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:57:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:57:11,310 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 00:57:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:12,135 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2022-11-26 00:57:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:57:12,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-11-26 00:57:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:12,161 INFO L225 Difference]: With dead ends: 1037 [2022-11-26 00:57:12,162 INFO L226 Difference]: Without dead ends: 685 [2022-11-26 00:57:12,172 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 [2022-11-26 00:57:12,178 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:12,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:57:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-26 00:57:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2022-11-26 00:57:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2022-11-26 00:57:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2022-11-26 00:57:12,329 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2022-11-26 00:57:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:12,331 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2022-11-26 00:57:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 00:57:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2022-11-26 00:57:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:57:12,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:12,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:12,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:57:12,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 526041047, now seen corresponding path program 1 times [2022-11-26 00:57:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:12,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416491610] [2022-11-26 00:57:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:12,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:57:12,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:12,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416491610] [2022-11-26 00:57:12,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416491610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:12,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:57:12,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:57:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425247023] [2022-11-26 00:57:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:12,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:57:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:57:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:57:12,838 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 00:57:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:13,666 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2022-11-26 00:57:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:57:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2022-11-26 00:57:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:13,673 INFO L225 Difference]: With dead ends: 776 [2022-11-26 00:57:13,673 INFO L226 Difference]: Without dead ends: 774 [2022-11-26 00:57:13,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:57:13,676 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 637 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:13,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1626 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:57:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-26 00:57:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2022-11-26 00:57:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 00:57:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2022-11-26 00:57:13,734 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2022-11-26 00:57:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:13,735 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2022-11-26 00:57:13,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-26 00:57:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2022-11-26 00:57:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:57:13,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:13,739 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-26 00:57:13,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:57:13,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1228260862, now seen corresponding path program 1 times [2022-11-26 00:57:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:13,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149073901] [2022-11-26 00:57:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:57:13,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:13,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149073901] [2022-11-26 00:57:13,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149073901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:13,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:57:13,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:57:13,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283251886] [2022-11-26 00:57:13,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:57:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:57:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:57:13,994 INFO L87 Difference]: Start difference. First operand 764 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 00:57:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:14,189 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2022-11-26 00:57:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:57:14,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-26 00:57:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:14,196 INFO L225 Difference]: With dead ends: 1554 [2022-11-26 00:57:14,196 INFO L226 Difference]: Without dead ends: 802 [2022-11-26 00:57:14,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:57:14,208 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 54 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:14,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:57:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-26 00:57:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2022-11-26 00:57:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 00:57:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2022-11-26 00:57:14,276 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2022-11-26 00:57:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:14,277 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2022-11-26 00:57:14,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 00:57:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2022-11-26 00:57:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-26 00:57:14,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:14,285 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2022-11-26 00:57:14,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:57:14,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash 782844242, now seen corresponding path program 1 times [2022-11-26 00:57:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:14,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312650329] [2022-11-26 00:57:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 00:57:14,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312650329] [2022-11-26 00:57:14,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312650329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539562875] [2022-11-26 00:57:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:14,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:14,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:57:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:57:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:57:15,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:57:15,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539562875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:15,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:57:15,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-26 00:57:15,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539278704] [2022-11-26 00:57:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:57:15,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:57:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:57:15,087 INFO L87 Difference]: Start difference. First operand 768 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:15,448 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2022-11-26 00:57:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:57:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2022-11-26 00:57:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:15,456 INFO L225 Difference]: With dead ends: 1602 [2022-11-26 00:57:15,457 INFO L226 Difference]: Without dead ends: 846 [2022-11-26 00:57:15,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:57:15,470 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:15,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:57:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-26 00:57:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-11-26 00:57:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 00:57:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2022-11-26 00:57:15,551 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2022-11-26 00:57:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:15,551 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2022-11-26 00:57:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2022-11-26 00:57:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:57:15,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:15,558 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2022-11-26 00:57:15,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:15,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:15,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837937, now seen corresponding path program 1 times [2022-11-26 00:57:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440655752] [2022-11-26 00:57:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:57:15,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:15,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440655752] [2022-11-26 00:57:15,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440655752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881078334] [2022-11-26 00:57:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:15,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:15,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:15,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:57:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:16,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:57:16,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:57:16,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:57:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881078334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:16,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:57:16,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:57:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836714768] [2022-11-26 00:57:16,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:57:16,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:57:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:57:16,345 INFO L87 Difference]: Start difference. First operand 846 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:16,695 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2022-11-26 00:57:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:57:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2022-11-26 00:57:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:16,702 INFO L225 Difference]: With dead ends: 1758 [2022-11-26 00:57:16,702 INFO L226 Difference]: Without dead ends: 924 [2022-11-26 00:57:16,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:57:16,709 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:16,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:57:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-26 00:57:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-11-26 00:57:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 00:57:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2022-11-26 00:57:16,770 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2022-11-26 00:57:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:16,771 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2022-11-26 00:57:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2022-11-26 00:57:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:57:16,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:16,776 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2022-11-26 00:57:16,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:16,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:16,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1280945471, now seen corresponding path program 1 times [2022-11-26 00:57:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:16,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919686970] [2022-11-26 00:57:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-26 00:57:17,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919686970] [2022-11-26 00:57:17,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919686970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647113038] [2022-11-26 00:57:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:17,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:17,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:57:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:17,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:57:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:57:17,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:57:17,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647113038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:17,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:57:17,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:57:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306414153] [2022-11-26 00:57:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:57:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:17,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:57:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:57:17,522 INFO L87 Difference]: Start difference. First operand 924 states and 1485 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:17,864 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2022-11-26 00:57:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:57:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2022-11-26 00:57:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:17,870 INFO L225 Difference]: With dead ends: 1914 [2022-11-26 00:57:17,871 INFO L226 Difference]: Without dead ends: 1002 [2022-11-26 00:57:17,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:57:17,878 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:17,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:57:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-26 00:57:17,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-26 00:57:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 00:57:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2022-11-26 00:57:17,932 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2022-11-26 00:57:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:17,932 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2022-11-26 00:57:17,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2022-11-26 00:57:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 00:57:17,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:17,937 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:17,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:18,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:18,144 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1320443278, now seen corresponding path program 1 times [2022-11-26 00:57:18,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66761162] [2022-11-26 00:57:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:57:18,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66761162] [2022-11-26 00:57:18,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66761162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524787258] [2022-11-26 00:57:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:18,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:18,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:18,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:57:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:57:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 00:57:18,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:57:18,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524787258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:57:18,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:57:18,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:57:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650873654] [2022-11-26 00:57:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:57:18,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:57:18,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:57:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:57:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:57:18,661 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:57:19,005 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2022-11-26 00:57:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:57:19,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-26 00:57:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:57:19,011 INFO L225 Difference]: With dead ends: 2070 [2022-11-26 00:57:19,012 INFO L226 Difference]: Without dead ends: 1080 [2022-11-26 00:57:19,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:57:19,017 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:57:19,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:57:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-26 00:57:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-26 00:57:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2022-11-26 00:57:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2022-11-26 00:57:19,062 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2022-11-26 00:57:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:57:19,063 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2022-11-26 00:57:19,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:57:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2022-11-26 00:57:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:57:19,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:57:19,068 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:57:19,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:57:19,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:57:19,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:57:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:57:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2027278208, now seen corresponding path program 1 times [2022-11-26 00:57:19,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:57:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785587750] [2022-11-26 00:57:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:19,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:57:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 00:57:19,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:57:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785587750] [2022-11-26 00:57:19,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785587750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:57:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076647495] [2022-11-26 00:57:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:57:19,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:57:19,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:57:19,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:57:19,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:57:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:57:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:57:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:57:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-26 00:57:21,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:14,166 WARN L233 SmtUtils]: Spent 49.87s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:58:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-26 00:58:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076647495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:17,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227954384] [2022-11-26 00:58:17,260 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-26 00:58:17,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:17,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:17,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:17,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:20,290 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 00:58:23,862 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 00:58:24,574 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2022-11-26 00:58:35,658 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2022-11-26 00:58:35,665 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 100 for LOIs [2022-11-26 00:58:35,783 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2022-11-26 00:58:36,364 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 437 for LOIs [2022-11-26 00:58:37,136 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-11-26 00:58:37,149 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 00:58:37,283 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 82 for LOIs [2022-11-26 00:58:37,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:00,170 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:07,601 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:16,484 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:34,078 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:40,118 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 610 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:46,095 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 606 DAG size of output: 581 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:00:23,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25729#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentFloorID~0 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= ~personOnFloor_5_1~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~5#1| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 ~currentFloorID~0) (= |old(~weight~0)| 0) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 ~floorButtons_3~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (<= 1 ~currentHeading~0) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= 1 ~personOnFloor_5_1~0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 ~weight~0) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-26 01:00:23,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:23,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:23,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2022-11-26 01:00:23,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247652525] [2022-11-26 01:00:23,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:23,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 01:00:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 01:00:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=7041, Unknown=0, NotChecked=0, Total=7832 [2022-11-26 01:00:23,908 INFO L87 Difference]: Start difference. First operand 1080 states and 1777 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-26 01:00:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:40,189 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2022-11-26 01:00:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-26 01:00:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2022-11-26 01:00:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:40,203 INFO L225 Difference]: With dead ends: 3455 [2022-11-26 01:00:40,203 INFO L226 Difference]: Without dead ends: 1904 [2022-11-26 01:00:40,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 293 SyntacticMatches, 15 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7546 ImplicationChecksByTransitivity, 110.6s TimeCoverageRelationStatistics Valid=1845, Invalid=17895, Unknown=0, NotChecked=0, Total=19740 [2022-11-26 01:00:40,223 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 5015 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 15345 mSolverCounterSat, 2944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5060 SdHoareTripleChecker+Valid, 3879 SdHoareTripleChecker+Invalid, 18289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2944 IncrementalHoareTripleChecker+Valid, 15345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:40,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5060 Valid, 3879 Invalid, 18289 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2944 Valid, 15345 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2022-11-26 01:00:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-26 01:00:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2022-11-26 01:00:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1262 states have (on average 1.5736925515055467) internal successors, (1986), 1324 states have internal predecessors, (1986), 372 states have call successors, (372), 132 states have call predecessors, (372), 126 states have return successors, (414), 352 states have call predecessors, (414), 369 states have call successors, (414) [2022-11-26 01:00:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2022-11-26 01:00:40,380 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2022-11-26 01:00:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:40,381 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2022-11-26 01:00:40,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2022-11-26 01:00:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2022-11-26 01:00:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-26 01:00:40,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:40,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-11-26 01:00:40,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:40,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 01:00:40,598 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash -654703038, now seen corresponding path program 1 times [2022-11-26 01:00:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206454450] [2022-11-26 01:00:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-26 01:00:40,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:40,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206454450] [2022-11-26 01:00:40,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206454450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:40,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890470914] [2022-11-26 01:00:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:40,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:40,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:40,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:40,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:00:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:00:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 01:00:41,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:41,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890470914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:41,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:00:41,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-26 01:00:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319023430] [2022-11-26 01:00:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:41,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:00:41,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:00:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:00:41,396 INFO L87 Difference]: Start difference. First operand 1761 states and 2772 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-26 01:00:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:42,361 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2022-11-26 01:00:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:00:42,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2022-11-26 01:00:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:42,372 INFO L225 Difference]: With dead ends: 3327 [2022-11-26 01:00:42,373 INFO L226 Difference]: Without dead ends: 1579 [2022-11-26 01:00:42,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:00:42,383 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 340 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:42,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:00:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-11-26 01:00:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2022-11-26 01:00:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1134 states have (on average 1.5864197530864197) internal successors, (1799), 1180 states have internal predecessors, (1799), 309 states have call successors, (309), 116 states have call predecessors, (309), 111 states have return successors, (338), 294 states have call predecessors, (338), 306 states have call successors, (338) [2022-11-26 01:00:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2022-11-26 01:00:42,499 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2022-11-26 01:00:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:42,499 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2022-11-26 01:00:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-26 01:00:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2022-11-26 01:00:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-26 01:00:42,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:42,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:42,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:42,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:42,717 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 541974728, now seen corresponding path program 1 times [2022-11-26 01:00:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:42,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120406584] [2022-11-26 01:00:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-26 01:00:43,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120406584] [2022-11-26 01:00:43,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120406584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154872086] [2022-11-26 01:00:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:43,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:43,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:43,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:00:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:00:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 01:00:44,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-26 01:00:44,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154872086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:44,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207183153] [2022-11-26 01:00:44,542 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-26 01:00:44,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:44,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:44,543 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:44,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:49,766 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-26 01:01:01,094 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-11-26 01:01:01,183 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-11-26 01:01:01,254 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-11-26 01:01:01,432 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 23 for LOIs [2022-11-26 01:01:01,485 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-11-26 01:01:01,493 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 62 for LOIs [2022-11-26 01:01:01,506 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-11-26 01:01:01,512 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:01:04,909 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:01:05,639 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-11-26 01:01:05,683 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-11-26 01:01:05,685 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:01:05,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:27,977 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:01:35,371 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:01:44,187 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:01:56,777 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:02:29,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40967#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:29,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:29,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:29,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-11-26 01:02:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801120481] [2022-11-26 01:02:29,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:29,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:02:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:02:29,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=12473, Unknown=0, NotChecked=0, Total=13572 [2022-11-26 01:02:29,279 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-26 01:02:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:46,536 INFO L93 Difference]: Finished difference Result 5716 states and 9215 transitions. [2022-11-26 01:02:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-26 01:02:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 188 [2022-11-26 01:02:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:46,565 INFO L225 Difference]: With dead ends: 5716 [2022-11-26 01:02:46,566 INFO L226 Difference]: Without dead ends: 4123 [2022-11-26 01:02:46,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 485 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12891 ImplicationChecksByTransitivity, 85.6s TimeCoverageRelationStatistics Valid=2314, Invalid=28838, Unknown=0, NotChecked=0, Total=31152 [2022-11-26 01:02:46,590 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 8377 mSDsluCounter, 4398 mSDsCounter, 0 mSdLazyCounter, 18292 mSolverCounterSat, 6302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8398 SdHoareTripleChecker+Valid, 4971 SdHoareTripleChecker+Invalid, 24594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6302 IncrementalHoareTripleChecker+Valid, 18292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:46,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8398 Valid, 4971 Invalid, 24594 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6302 Valid, 18292 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2022-11-26 01:02:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2022-11-26 01:02:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3779. [2022-11-26 01:02:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 2781 states have (on average 1.5329018338727076) internal successors, (4263), 2861 states have internal predecessors, (4263), 704 states have call successors, (704), 302 states have call predecessors, (704), 293 states have return successors, (815), 675 states have call predecessors, (815), 696 states have call successors, (815) [2022-11-26 01:02:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5782 transitions. [2022-11-26 01:02:46,922 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5782 transitions. Word has length 188 [2022-11-26 01:02:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:46,923 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 5782 transitions. [2022-11-26 01:02:46,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-26 01:02:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5782 transitions. [2022-11-26 01:02:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-26 01:02:46,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:46,963 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:46,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:47,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:47,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash 514516799, now seen corresponding path program 1 times [2022-11-26 01:02:47,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:47,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549362162] [2022-11-26 01:02:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:47,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-26 01:02:47,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:47,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549362162] [2022-11-26 01:02:47,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549362162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:47,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125725113] [2022-11-26 01:02:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:47,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:47,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:47,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:02:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:02:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 98 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-11-26 01:02:48,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-26 01:02:49,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125725113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:49,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509711445] [2022-11-26 01:02:49,008 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2022-11-26 01:02:49,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:49,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:49,009 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:49,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:54,852 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2022-11-26 01:03:05,537 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 38 for LOIs [2022-11-26 01:03:05,622 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 51 for LOIs [2022-11-26 01:03:05,691 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2022-11-26 01:03:05,874 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2022-11-26 01:03:05,933 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 24 for LOIs [2022-11-26 01:03:05,942 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 62 for LOIs [2022-11-26 01:03:05,957 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 51 for LOIs [2022-11-26 01:03:05,963 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:03:09,543 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-26 01:03:10,243 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2022-11-26 01:03:10,310 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2022-11-26 01:03:10,318 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-26 01:03:10,514 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:32,985 WARN L233 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:03:40,415 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:03:49,307 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:04:02,064 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:04:38,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55664#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:04:38,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:04:38,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:04:38,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-26 01:04:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387314519] [2022-11-26 01:04:38,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:04:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:04:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=12202, Unknown=0, NotChecked=0, Total=13340 [2022-11-26 01:04:38,805 INFO L87 Difference]: Start difference. First operand 3779 states and 5782 transitions. Second operand has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-26 01:04:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:44,910 INFO L93 Difference]: Finished difference Result 7497 states and 11445 transitions. [2022-11-26 01:04:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 01:04:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 246 [2022-11-26 01:04:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:44,945 INFO L225 Difference]: With dead ends: 7497 [2022-11-26 01:04:44,945 INFO L226 Difference]: Without dead ends: 4773 [2022-11-26 01:04:44,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 630 SyntacticMatches, 17 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7205 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=1479, Invalid=17153, Unknown=0, NotChecked=0, Total=18632 [2022-11-26 01:04:44,967 INFO L413 NwaCegarLoop]: 1007 mSDtfsCounter, 2541 mSDsluCounter, 8314 mSDsCounter, 0 mSdLazyCounter, 6038 mSolverCounterSat, 1675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2561 SdHoareTripleChecker+Valid, 9321 SdHoareTripleChecker+Invalid, 7713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1675 IncrementalHoareTripleChecker+Valid, 6038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:44,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2561 Valid, 9321 Invalid, 7713 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1675 Valid, 6038 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-26 01:04:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2022-11-26 01:04:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4649. [2022-11-26 01:04:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 3408 states have (on average 1.4838615023474178) internal successors, (5057), 3491 states have internal predecessors, (5057), 859 states have call successors, (859), 392 states have call predecessors, (859), 381 states have return successors, (1054), 825 states have call predecessors, (1054), 849 states have call successors, (1054) [2022-11-26 01:04:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 6970 transitions. [2022-11-26 01:04:45,433 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 6970 transitions. Word has length 246 [2022-11-26 01:04:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:45,434 INFO L495 AbstractCegarLoop]: Abstraction has 4649 states and 6970 transitions. [2022-11-26 01:04:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.210526315789474) internal successors, (194), 22 states have internal predecessors, (194), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2022-11-26 01:04:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 6970 transitions. [2022-11-26 01:04:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-11-26 01:04:45,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:45,468 INFO L195 NwaCegarLoop]: trace histogram [14, 11, 11, 11, 11, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:04:45,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:45,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:45,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash 711742788, now seen corresponding path program 1 times [2022-11-26 01:04:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:45,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642624909] [2022-11-26 01:04:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-26 01:04:46,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642624909] [2022-11-26 01:04:46,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642624909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:46,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086569296] [2022-11-26 01:04:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:46,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:46,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:46,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:46,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:04:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:04:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 123 proven. 38 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-26 01:04:47,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-11-26 01:04:48,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086569296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400688307] [2022-11-26 01:04:48,194 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2022-11-26 01:04:48,195 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:48,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:48,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:48,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:55,032 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-11-26 01:04:55,457 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2022-11-26 01:04:57,057 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-11-26 01:04:57,187 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-11-26 01:04:57,228 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-26 01:04:57,509 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 50 for LOIs [2022-11-26 01:04:57,601 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-26 01:04:57,608 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-11-26 01:04:57,620 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-26 01:04:57,624 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:05:00,914 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2022-11-26 01:05:00,973 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2022-11-26 01:05:00,976 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-11-26 01:05:03,080 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-11-26 01:05:11,489 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-11-26 01:05:11,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:29,774 WARN L233 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:39,865 WARN L233 SmtUtils]: Spent 9.64s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:47,290 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:54,769 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:03,902 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:20,390 WARN L233 SmtUtils]: Spent 15.80s on a formula simplification. DAG size of input: 790 DAG size of output: 771 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:20,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74696#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-11-26 01:07:20,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:07:20,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:20,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-26 01:07:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286574223] [2022-11-26 01:07:20,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:20,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:07:20,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:20,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:07:20,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=14168, Unknown=0, NotChecked=0, Total=15252 [2022-11-26 01:07:20,240 INFO L87 Difference]: Start difference. First operand 4649 states and 6970 transitions. Second operand has 25 states, 21 states have (on average 11.428571428571429) internal successors, (240), 23 states have internal predecessors, (240), 12 states have call successors, (86), 7 states have call predecessors, (86), 12 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2022-11-26 01:07:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:57,111 INFO L93 Difference]: Finished difference Result 18072 states and 27893 transitions. [2022-11-26 01:07:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-11-26 01:07:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 11.428571428571429) internal successors, (240), 23 states have internal predecessors, (240), 12 states have call successors, (86), 7 states have call predecessors, (86), 12 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) Word has length 322 [2022-11-26 01:07:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:57,176 INFO L225 Difference]: With dead ends: 18072 [2022-11-26 01:07:57,177 INFO L226 Difference]: Without dead ends: 10683 [2022-11-26 01:07:57,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 896 SyntacticMatches, 36 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33721 ImplicationChecksByTransitivity, 137.5s TimeCoverageRelationStatistics Valid=4824, Invalid=74418, Unknown=0, NotChecked=0, Total=79242 [2022-11-26 01:07:57,216 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 6104 mSDsluCounter, 9539 mSDsCounter, 0 mSdLazyCounter, 39504 mSolverCounterSat, 7759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6111 SdHoareTripleChecker+Valid, 10366 SdHoareTripleChecker+Invalid, 47263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 7759 IncrementalHoareTripleChecker+Valid, 39504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:57,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6111 Valid, 10366 Invalid, 47263 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [7759 Valid, 39504 Invalid, 0 Unknown, 0 Unchecked, 25.8s Time] [2022-11-26 01:07:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2022-11-26 01:07:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 9851. [2022-11-26 01:07:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9851 states, 7232 states have (on average 1.4521570796460177) internal successors, (10502), 7386 states have internal predecessors, (10502), 1783 states have call successors, (1783), 841 states have call predecessors, (1783), 835 states have return successors, (2496), 1719 states have call predecessors, (2496), 1770 states have call successors, (2496) [2022-11-26 01:07:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9851 states to 9851 states and 14781 transitions. [2022-11-26 01:07:58,231 INFO L78 Accepts]: Start accepts. Automaton has 9851 states and 14781 transitions. Word has length 322 [2022-11-26 01:07:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:58,232 INFO L495 AbstractCegarLoop]: Abstraction has 9851 states and 14781 transitions. [2022-11-26 01:07:58,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 11.428571428571429) internal successors, (240), 23 states have internal predecessors, (240), 12 states have call successors, (86), 7 states have call predecessors, (86), 12 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2022-11-26 01:07:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 9851 states and 14781 transitions. [2022-11-26 01:07:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-26 01:07:58,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:58,302 INFO L195 NwaCegarLoop]: trace histogram [17, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:58,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:07:58,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1565985314, now seen corresponding path program 1 times [2022-11-26 01:07:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:58,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683797977] [2022-11-26 01:07:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 84 proven. 22 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-11-26 01:07:59,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683797977] [2022-11-26 01:07:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683797977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105437169] [2022-11-26 01:07:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:59,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:59,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:59,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:07:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:59,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 3432 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:07:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2022-11-26 01:08:00,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:08:00,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105437169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:08:00,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:08:00,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 01:08:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719178349] [2022-11-26 01:08:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:08:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:08:00,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:08:00,033 INFO L87 Difference]: Start difference. First operand 9851 states and 14781 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-26 01:08:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:00,924 INFO L93 Difference]: Finished difference Result 17684 states and 26492 transitions. [2022-11-26 01:08:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:08:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 404 [2022-11-26 01:08:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:00,987 INFO L225 Difference]: With dead ends: 17684 [2022-11-26 01:08:00,987 INFO L226 Difference]: Without dead ends: 10495 [2022-11-26 01:08:01,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 01:08:01,024 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 386 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:01,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 986 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:08:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2022-11-26 01:08:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10427. [2022-11-26 01:08:02,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10427 states, 7640 states have (on average 1.4197643979057593) internal successors, (10847), 7794 states have internal predecessors, (10847), 1879 states have call successors, (1879), 913 states have call predecessors, (1879), 907 states have return successors, (2597), 1815 states have call predecessors, (2597), 1866 states have call successors, (2597) [2022-11-26 01:08:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10427 states to 10427 states and 15323 transitions. [2022-11-26 01:08:02,150 INFO L78 Accepts]: Start accepts. Automaton has 10427 states and 15323 transitions. Word has length 404 [2022-11-26 01:08:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:02,151 INFO L495 AbstractCegarLoop]: Abstraction has 10427 states and 15323 transitions. [2022-11-26 01:08:02,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-26 01:08:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 10427 states and 15323 transitions. [2022-11-26 01:08:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-26 01:08:02,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:02,203 INFO L195 NwaCegarLoop]: trace histogram [17, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:02,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:02,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 01:08:02,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1026988924, now seen corresponding path program 1 times [2022-11-26 01:08:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:02,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143971509] [2022-11-26 01:08:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2022-11-26 01:08:03,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143971509] [2022-11-26 01:08:03,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143971509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24882309] [2022-11-26 01:08:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:03,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:03,062 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:03,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fff7a985-fd5b-4424-83cd-9d8de3fdf757/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:08:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 3448 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:08:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 155 proven. 42 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-11-26 01:08:04,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 53 proven. 31 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2022-11-26 01:08:04,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24882309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:04,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318675336] [2022-11-26 01:08:04,863 INFO L159 IcfgInterpreter]: Started Sifa with 154 locations of interest [2022-11-26 01:08:04,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:04,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:04,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:04,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:11,976 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2022-11-26 01:08:15,006 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2022-11-26 01:08:19,621 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 32 for LOIs [2022-11-26 01:08:19,904 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2022-11-26 01:08:19,969 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2022-11-26 01:08:20,219 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 50 for LOIs [2022-11-26 01:08:20,334 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-26 01:08:20,342 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 66 for LOIs [2022-11-26 01:08:20,356 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-11-26 01:08:20,360 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2022-11-26 01:08:23,620 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 403 for LOIs [2022-11-26 01:08:23,677 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-11-26 01:08:23,729 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 57 for LOIs [2022-11-26 01:08:23,738 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2022-11-26 01:08:25,849 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2022-11-26 01:08:50,934 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2022-11-26 01:08:51,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:09:09,172 WARN L233 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:19,392 WARN L233 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:26,873 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:34,405 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:43,720 WARN L233 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:01,611 WARN L233 SmtUtils]: Spent 16.56s on a formula simplification. DAG size of input: 892 DAG size of output: 771 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)