./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7 --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 a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:20:00,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:20:00,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:20:00,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:20:00,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:20:00,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:20:00,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:20:00,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:20:00,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:20:00,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:20:00,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:20:00,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:20:00,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:20:00,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:20:00,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:20:00,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:20:00,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:20:00,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:20:00,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:20:00,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:20:00,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:20:00,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:20:00,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:20:00,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:20:00,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:20:00,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:20:00,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:20:00,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:20:00,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:20:00,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:20:00,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:20:00,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:20:00,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:20:00,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:20:00,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:20:00,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:20:00,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:20:00,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:20:00,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:20:00,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:20:00,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:20:00,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:20:00,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:20:00,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:20:00,693 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:20:00,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:20:00,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:20:00,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:20:00,694 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:20:00,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:20:00,695 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:20:00,695 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:20:00,696 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:20:00,696 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:20:00,696 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:20:00,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:20:00,697 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:20:00,697 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:20:00,697 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:20:00,698 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:20:00,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:20:00,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:20:00,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:20:00,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:20:00,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:20:00,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:20:00,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:20:00,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:20:00,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:20:00,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:20:00,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:20:00,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:20:00,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:20:00,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:20:00,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:20:00,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:20:00,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:20:00,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:20:00,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:20:00,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:20:00,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:20:00,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:20:00,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:20:00,722 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2021-11-25 18:20:01,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:20:01,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:20:01,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:20:01,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:20:01,124 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:20:01,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-25 18:20:01,207 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/data/8392d3362/a55fd363a1da4444bda4a3cf928de4c2/FLAGbe64aea92 [2021-11-25 18:20:02,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:20:02,022 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-25 18:20:02,072 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/data/8392d3362/a55fd363a1da4444bda4a3cf928de4c2/FLAGbe64aea92 [2021-11-25 18:20:02,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/data/8392d3362/a55fd363a1da4444bda4a3cf928de4c2 [2021-11-25 18:20:02,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:20:02,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:20:02,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:20:02,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:20:02,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:20:02,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:20:02" (1/1) ... [2021-11-25 18:20:02,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1b383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:02, skipping insertion in model container [2021-11-25 18:20:02,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:20:02" (1/1) ... [2021-11-25 18:20:02,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:20:02,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:20:02,947 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-25 18:20:03,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:20:03,471 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:20:03,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-25 18:20:03,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:20:03,700 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:20:03,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03 WrapperNode [2021-11-25 18:20:03,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:20:03,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:20:03,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:20:03,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:20:03,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,841 INFO L137 Inliner]: procedures = 90, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1061 [2021-11-25 18:20:03,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:20:03,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:20:03,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:20:03,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:20:03,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:20:03,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:20:03,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:20:03,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:20:03,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (1/1) ... [2021-11-25 18:20:03,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:20:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:03,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:20:04,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:20:04,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:20:04,060 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 18:20:04,061 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 18:20:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 18:20:04,061 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 18:20:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 18:20:04,061 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 18:20:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 18:20:04,062 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 18:20:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 18:20:04,062 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 18:20:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 18:20:04,063 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 18:20:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 18:20:04,063 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 18:20:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 18:20:04,063 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 18:20:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 18:20:04,064 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 18:20:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 18:20:04,064 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 18:20:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 18:20:04,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 18:20:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 18:20:04,065 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 18:20:04,065 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 18:20:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 18:20:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 18:20:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 18:20:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 18:20:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 18:20:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 18:20:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 18:20:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 18:20:04,069 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 18:20:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 18:20:04,070 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 18:20:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:20:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 18:20:04,070 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 18:20:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 18:20:04,070 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 18:20:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 18:20:04,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 18:20:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:20:04,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:20:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 18:20:04,073 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 18:20:04,316 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:20:04,318 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:20:05,846 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:20:06,617 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:20:06,617 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:20:06,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:20:06 BoogieIcfgContainer [2021-11-25 18:20:06,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:20:06,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:20:06,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:20:06,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:20:06,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:20:02" (1/3) ... [2021-11-25 18:20:06,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df858ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:20:06, skipping insertion in model container [2021-11-25 18:20:06,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:20:03" (2/3) ... [2021-11-25 18:20:06,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df858ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:20:06, skipping insertion in model container [2021-11-25 18:20:06,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:20:06" (3/3) ... [2021-11-25 18:20:06,637 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2021-11-25 18:20:06,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:20:06,648 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:20:06,729 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:20:06,742 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:20:06,743 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:20:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-25 18:20:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 18:20:06,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:06,823 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:06,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -484411217, now seen corresponding path program 1 times [2021-11-25 18:20:06,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:06,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154225532] [2021-11-25 18:20:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:06,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:20:07,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:07,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154225532] [2021-11-25 18:20:07,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154225532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:07,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:20:07,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:20:07,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409824681] [2021-11-25 18:20:07,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:07,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:20:07,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:20:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:20:07,508 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) 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) [2021-11-25 18:20:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:08,502 INFO L93 Difference]: Finished difference Result 1019 states and 1636 transitions. [2021-11-25 18:20:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:20:08,505 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 [2021-11-25 18:20:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:08,529 INFO L225 Difference]: With dead ends: 1019 [2021-11-25 18:20:08,530 INFO L226 Difference]: Without dead ends: 673 [2021-11-25 18:20:08,540 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:20:08,544 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 523 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:08,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 2288 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:20:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-25 18:20:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2021-11-25 18:20:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 449 states have (on average 1.5679287305122493) internal successors, (704), 478 states have internal predecessors, (704), 176 states have call successors, (176), 43 states have call predecessors, (176), 41 states have return successors, (182), 170 states have call predecessors, (182), 174 states have call successors, (182) [2021-11-25 18:20:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1062 transitions. [2021-11-25 18:20:08,747 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1062 transitions. Word has length 73 [2021-11-25 18:20:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:08,751 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1062 transitions. [2021-11-25 18:20:08,751 INFO L471 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) [2021-11-25 18:20:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1062 transitions. [2021-11-25 18:20:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:20:08,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:08,774 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:08,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:20:08,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1001026953, now seen corresponding path program 1 times [2021-11-25 18:20:08,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:08,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132075979] [2021-11-25 18:20:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:08,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 18:20:09,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132075979] [2021-11-25 18:20:09,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132075979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:09,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:20:09,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:20:09,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365067571] [2021-11-25 18:20:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:09,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:20:09,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:20:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:20:09,127 INFO L87 Difference]: Start difference. First operand 667 states and 1062 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) [2021-11-25 18:20:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:10,047 INFO L93 Difference]: Finished difference Result 764 states and 1209 transitions. [2021-11-25 18:20:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:20:10,048 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 [2021-11-25 18:20:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:10,065 INFO L225 Difference]: With dead ends: 764 [2021-11-25 18:20:10,065 INFO L226 Difference]: Without dead ends: 762 [2021-11-25 18:20:10,071 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:20:10,074 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:10,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:20:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-25 18:20:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 752. [2021-11-25 18:20:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 500 states have (on average 1.534) internal successors, (767), 529 states have internal predecessors, (767), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1175 transitions. [2021-11-25 18:20:10,197 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1175 transitions. Word has length 77 [2021-11-25 18:20:10,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:10,202 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1175 transitions. [2021-11-25 18:20:10,202 INFO L471 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) [2021-11-25 18:20:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1175 transitions. [2021-11-25 18:20:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 18:20:10,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:10,216 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:10,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:20:10,217 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash 756903943, now seen corresponding path program 1 times [2021-11-25 18:20:10,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:10,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425412326] [2021-11-25 18:20:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:10,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 18:20:10,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:10,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425412326] [2021-11-25 18:20:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425412326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:10,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:20:10,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:20:10,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556504420] [2021-11-25 18:20:10,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:10,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:20:10,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:20:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:20:10,431 INFO L87 Difference]: Start difference. First operand 752 states and 1175 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) [2021-11-25 18:20:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:10,716 INFO L93 Difference]: Finished difference Result 1530 states and 2419 transitions. [2021-11-25 18:20:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:10,717 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 [2021-11-25 18:20:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:10,726 INFO L225 Difference]: With dead ends: 1530 [2021-11-25 18:20:10,726 INFO L226 Difference]: Without dead ends: 790 [2021-11-25 18:20:10,734 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:20:10,744 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:10,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:20:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-25 18:20:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 756. [2021-11-25 18:20:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 504 states have (on average 1.5297619047619047) internal successors, (771), 533 states have internal predecessors, (771), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1179 transitions. [2021-11-25 18:20:10,823 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1179 transitions. Word has length 108 [2021-11-25 18:20:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:10,824 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1179 transitions. [2021-11-25 18:20:10,824 INFO L471 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) [2021-11-25 18:20:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1179 transitions. [2021-11-25 18:20:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 18:20:10,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:10,835 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:10,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:20:10,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2136138177, now seen corresponding path program 1 times [2021-11-25 18:20:10,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:10,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486128741] [2021-11-25 18:20:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:10,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 18:20:11,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486128741] [2021-11-25 18:20:11,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486128741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:20:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188150338] [2021-11-25 18:20:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:11,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:11,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:11,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:20:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:20:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 18:20:11,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:20:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188150338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:11,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:20:11,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 18:20:11,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434232769] [2021-11-25 18:20:11,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:11,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:20:11,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:11,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:20:11,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:20:11,815 INFO L87 Difference]: Start difference. First operand 756 states and 1179 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) [2021-11-25 18:20:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:12,185 INFO L93 Difference]: Finished difference Result 1578 states and 2508 transitions. [2021-11-25 18:20:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:12,186 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 [2021-11-25 18:20:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:12,219 INFO L225 Difference]: With dead ends: 1578 [2021-11-25 18:20:12,220 INFO L226 Difference]: Without dead ends: 834 [2021-11-25 18:20:12,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:20:12,239 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:12,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:20:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-25 18:20:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-11-25 18:20:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 580 states have (on average 1.5810344827586207) internal successors, (917), 609 states have internal predecessors, (917), 198 states have call successors, (198), 58 states have call predecessors, (198), 55 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1325 transitions. [2021-11-25 18:20:12,308 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1325 transitions. Word has length 111 [2021-11-25 18:20:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:12,309 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1325 transitions. [2021-11-25 18:20:12,310 INFO L471 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) [2021-11-25 18:20:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1325 transitions. [2021-11-25 18:20:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:20:12,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:12,318 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:12,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:20:12,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:12,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2099866642, now seen corresponding path program 1 times [2021-11-25 18:20:12,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:12,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290476340] [2021-11-25 18:20:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:12,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 18:20:12,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290476340] [2021-11-25 18:20:12,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290476340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:20:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964606680] [2021-11-25 18:20:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:12,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:12,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:12,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:12,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:20:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:20:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 18:20:13,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:20:13,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964606680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:13,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:20:13,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 18:20:13,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912487893] [2021-11-25 18:20:13,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:13,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:20:13,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:13,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:20:13,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:20:13,276 INFO L87 Difference]: Start difference. First operand 834 states and 1325 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) [2021-11-25 18:20:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:13,644 INFO L93 Difference]: Finished difference Result 1734 states and 2798 transitions. [2021-11-25 18:20:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:13,645 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 [2021-11-25 18:20:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:13,658 INFO L225 Difference]: With dead ends: 1734 [2021-11-25 18:20:13,658 INFO L226 Difference]: Without dead ends: 912 [2021-11-25 18:20:13,679 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:20:13,682 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:13,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:20:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-11-25 18:20:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2021-11-25 18:20:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 656 states have (on average 1.6204268292682926) internal successors, (1063), 685 states have internal predecessors, (1063), 198 states have call successors, (198), 60 states have call predecessors, (198), 57 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1471 transitions. [2021-11-25 18:20:13,764 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1471 transitions. Word has length 116 [2021-11-25 18:20:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:13,765 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1471 transitions. [2021-11-25 18:20:13,765 INFO L471 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) [2021-11-25 18:20:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1471 transitions. [2021-11-25 18:20:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-25 18:20:13,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:13,771 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:13,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:20:13,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:13,997 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash -438632994, now seen corresponding path program 1 times [2021-11-25 18:20:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483228972] [2021-11-25 18:20:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:13,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 18:20:14,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483228972] [2021-11-25 18:20:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483228972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:20:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801991087] [2021-11-25 18:20:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:14,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:14,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:14,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:20:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:20:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 18:20:14,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:20:14,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801991087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:14,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:20:14,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 18:20:14,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729262981] [2021-11-25 18:20:14,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:14,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:20:14,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:14,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:20:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:20:14,769 INFO L87 Difference]: Start difference. First operand 912 states and 1471 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) [2021-11-25 18:20:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:15,133 INFO L93 Difference]: Finished difference Result 1890 states and 3088 transitions. [2021-11-25 18:20:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:15,133 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 [2021-11-25 18:20:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:15,144 INFO L225 Difference]: With dead ends: 1890 [2021-11-25 18:20:15,144 INFO L226 Difference]: Without dead ends: 990 [2021-11-25 18:20:15,152 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:20:15,153 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:15,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:20:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-11-25 18:20:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2021-11-25 18:20:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 732 states have (on average 1.651639344262295) internal successors, (1209), 761 states have internal predecessors, (1209), 198 states have call successors, (198), 62 states have call predecessors, (198), 59 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1617 transitions. [2021-11-25 18:20:15,251 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1617 transitions. Word has length 120 [2021-11-25 18:20:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:15,252 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1617 transitions. [2021-11-25 18:20:15,253 INFO L471 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) [2021-11-25 18:20:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1617 transitions. [2021-11-25 18:20:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 18:20:15,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:15,261 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:20:15,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:20:15,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:15,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 549834207, now seen corresponding path program 1 times [2021-11-25 18:20:15,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471724380] [2021-11-25 18:20:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:15,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 18:20:15,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:15,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471724380] [2021-11-25 18:20:15,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471724380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:20:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84985784] [2021-11-25 18:20:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:15,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:15,613 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:15,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:20:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:20:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:20:16,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:20:16,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84985784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:16,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:20:16,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 18:20:16,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577191642] [2021-11-25 18:20:16,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:16,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:20:16,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:20:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:20:16,215 INFO L87 Difference]: Start difference. First operand 990 states and 1617 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) [2021-11-25 18:20:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:16,560 INFO L93 Difference]: Finished difference Result 2046 states and 3378 transitions. [2021-11-25 18:20:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:16,561 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 [2021-11-25 18:20:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:16,572 INFO L225 Difference]: With dead ends: 2046 [2021-11-25 18:20:16,572 INFO L226 Difference]: Without dead ends: 1068 [2021-11-25 18:20:16,579 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:20:16,580 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:16,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:20:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-25 18:20:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2021-11-25 18:20:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 808 states have (on average 1.676980198019802) internal successors, (1355), 837 states have internal predecessors, (1355), 198 states have call successors, (198), 64 states have call predecessors, (198), 61 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1763 transitions. [2021-11-25 18:20:16,640 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1763 transitions. Word has length 123 [2021-11-25 18:20:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:16,640 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1763 transitions. [2021-11-25 18:20:16,641 INFO L471 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) [2021-11-25 18:20:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1763 transitions. [2021-11-25 18:20:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 18:20:16,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:16,647 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2021-11-25 18:20:16,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:20:16,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:16,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:16,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2146047567, now seen corresponding path program 1 times [2021-11-25 18:20:16,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:16,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301927849] [2021-11-25 18:20:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:16,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 18:20:17,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301927849] [2021-11-25 18:20:17,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301927849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:17,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:20:17,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:20:17,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479474629] [2021-11-25 18:20:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:17,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:20:17,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:20:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:20:17,009 INFO L87 Difference]: Start difference. First operand 1068 states and 1763 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:20:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:17,386 INFO L93 Difference]: Finished difference Result 2208 states and 3666 transitions. [2021-11-25 18:20:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:20:17,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 125 [2021-11-25 18:20:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:17,406 INFO L225 Difference]: With dead ends: 2208 [2021-11-25 18:20:17,406 INFO L226 Difference]: Without dead ends: 1136 [2021-11-25 18:20:17,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:20:17,416 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 99 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:17,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:20:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-25 18:20:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2021-11-25 18:20:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 874 states have (on average 1.591533180778032) internal successors, (1391), 903 states have internal predecessors, (1391), 198 states have call successors, (198), 66 states have call predecessors, (198), 63 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2021-11-25 18:20:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1799 transitions. [2021-11-25 18:20:17,488 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1799 transitions. Word has length 125 [2021-11-25 18:20:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:17,488 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1799 transitions. [2021-11-25 18:20:17,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:20:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1799 transitions. [2021-11-25 18:20:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 18:20:17,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:17,495 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:20:17,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:20:17,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash 623391102, now seen corresponding path program 1 times [2021-11-25 18:20:17,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445699259] [2021-11-25 18:20:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:17,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 18:20:17,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445699259] [2021-11-25 18:20:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445699259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:20:17,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:20:17,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:20:17,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858457688] [2021-11-25 18:20:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:20:17,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:20:17,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:20:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:20:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:20:17,659 INFO L87 Difference]: Start difference. First operand 1136 states and 1799 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:20:18,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:20:18,383 INFO L93 Difference]: Finished difference Result 2331 states and 3678 transitions. [2021-11-25 18:20:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:20:18,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 125 [2021-11-25 18:20:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:20:18,394 INFO L225 Difference]: With dead ends: 2331 [2021-11-25 18:20:18,395 INFO L226 Difference]: Without dead ends: 1024 [2021-11-25 18:20:18,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:20:18,406 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 659 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:20:18,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 2601 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:20:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-25 18:20:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1002. [2021-11-25 18:20:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 724 states have (on average 1.5) internal successors, (1086), 755 states have internal predecessors, (1086), 207 states have call successors, (207), 74 states have call predecessors, (207), 70 states have return successors, (224), 196 states have call predecessors, (224), 204 states have call successors, (224) [2021-11-25 18:20:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1517 transitions. [2021-11-25 18:20:18,477 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1517 transitions. Word has length 125 [2021-11-25 18:20:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:20:18,478 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1517 transitions. [2021-11-25 18:20:18,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:20:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1517 transitions. [2021-11-25 18:20:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 18:20:18,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:20:18,484 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:20:18,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:20:18,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:20:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:20:18,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1665311154, now seen corresponding path program 1 times [2021-11-25 18:20:18,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:20:18,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776192791] [2021-11-25 18:20:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:18,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:20:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 18:20:19,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:20:19,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776192791] [2021-11-25 18:20:19,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776192791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:20:19,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673818037] [2021-11-25 18:20:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:20:19,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:20:19,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:20:19,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:20:19,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:20:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 18:20:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-25 18:20:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:14,094 WARN L227 SmtUtils]: Spent 49.33s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 18:21:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-25 18:21:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673818037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604102773] [2021-11-25 18:21:17,719 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2021-11-25 18:21:17,720 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:21:17,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:21:17,735 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:21:17,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:21:21,620 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-25 18:21:26,040 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:21:26,650 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 564 for LOIs [2021-11-25 18:21:50,659 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 60 for LOIs [2021-11-25 18:21:50,668 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 57 for LOIs [2021-11-25 18:21:50,743 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 97 for LOIs [2021-11-25 18:21:51,169 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 433 for LOIs [2021-11-25 18:21:51,959 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 491 for LOIs [2021-11-25 18:21:52,168 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:21:52,347 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 104 for LOIs [2021-11-25 18:21:52,375 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:11,924 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:22:18,214 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:23:32,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34062#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 0) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= ~currentFloorID~0 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 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) (= |old(~floorButtons_0~0)| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 ~currentFloorID~0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= 0 ~floorButtons_3~0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~10#1| 0) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= 1 ~currentHeading~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= 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_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |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|) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___2~4#1| 0) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-25 18:23:32,439 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:23:32,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:32,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 43 [2021-11-25 18:23:32,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443503176] [2021-11-25 18:23:32,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:32,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:23:32,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:23:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=9363, Unknown=0, NotChecked=0, Total=10302 [2021-11-25 18:23:32,445 INFO L87 Difference]: Start difference. First operand 1002 states and 1517 transitions. Second operand has 43 states, 31 states have (on average 5.290322580645161) internal successors, (164), 32 states have internal predecessors, (164), 10 states have call successors, (47), 9 states have call predecessors, (47), 18 states have return successors, (46), 19 states have call predecessors, (46), 10 states have call successors, (46) [2021-11-25 18:23:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:46,500 INFO L93 Difference]: Finished difference Result 3199 states and 4926 transitions. [2021-11-25 18:23:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-25 18:23:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 31 states have (on average 5.290322580645161) internal successors, (164), 32 states have internal predecessors, (164), 10 states have call successors, (47), 9 states have call predecessors, (47), 18 states have return successors, (46), 19 states have call predecessors, (46), 10 states have call successors, (46) Word has length 126 [2021-11-25 18:23:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:46,519 INFO L225 Difference]: With dead ends: 3199 [2021-11-25 18:23:46,519 INFO L226 Difference]: Without dead ends: 1772 [2021-11-25 18:23:46,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 298 SyntacticMatches, 20 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11476 ImplicationChecksByTransitivity, 104.0s TimeCoverageRelationStatistics Valid=2524, Invalid=25532, Unknown=0, NotChecked=0, Total=28056 [2021-11-25 18:23:46,542 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 6263 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 18662 mSolverCounterSat, 3964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6311 SdHoareTripleChecker+Valid, 5029 SdHoareTripleChecker+Invalid, 22626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3964 IncrementalHoareTripleChecker+Valid, 18662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:46,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6311 Valid, 5029 Invalid, 22626 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3964 Valid, 18662 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-11-25 18:23:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-11-25 18:23:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1647. [2021-11-25 18:23:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1156 states have (on average 1.4065743944636677) internal successors, (1626), 1218 states have internal predecessors, (1626), 364 states have call successors, (364), 132 states have call predecessors, (364), 126 states have return successors, (406), 344 states have call predecessors, (406), 361 states have call successors, (406) [2021-11-25 18:23:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2396 transitions. [2021-11-25 18:23:46,658 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2396 transitions. Word has length 126 [2021-11-25 18:23:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:46,659 INFO L470 AbstractCegarLoop]: Abstraction has 1647 states and 2396 transitions. [2021-11-25 18:23:46,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 31 states have (on average 5.290322580645161) internal successors, (164), 32 states have internal predecessors, (164), 10 states have call successors, (47), 9 states have call predecessors, (47), 18 states have return successors, (46), 19 states have call predecessors, (46), 10 states have call successors, (46) [2021-11-25 18:23:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2396 transitions. [2021-11-25 18:23:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:23:46,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:46,667 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2021-11-25 18:23:46,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:46,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:23:46,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1729776230, now seen corresponding path program 1 times [2021-11-25 18:23:46,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:46,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624645491] [2021-11-25 18:23:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:46,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 18:23:46,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624645491] [2021-11-25 18:23:46,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624645491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072739205] [2021-11-25 18:23:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:46,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:46,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:23:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:47,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:23:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-25 18:23:47,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:23:47,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072739205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:47,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:23:47,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 18:23:47,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598540723] [2021-11-25 18:23:47,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:47,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:23:47,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:47,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:23:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:23:47,548 INFO L87 Difference]: Start difference. First operand 1647 states and 2396 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-25 18:23:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:48,274 INFO L93 Difference]: Finished difference Result 3114 states and 4525 transitions. [2021-11-25 18:23:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:23:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 131 [2021-11-25 18:23:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:48,287 INFO L225 Difference]: With dead ends: 3114 [2021-11-25 18:23:48,287 INFO L226 Difference]: Without dead ends: 1480 [2021-11-25 18:23:48,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:23:48,298 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 333 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:48,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 2225 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:23:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-25 18:23:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1456. [2021-11-25 18:23:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1041 states have (on average 1.4159462055715657) internal successors, (1474), 1087 states have internal predecessors, (1474), 303 states have call successors, (303), 116 states have call predecessors, (303), 111 states have return successors, (332), 288 states have call predecessors, (332), 300 states have call successors, (332) [2021-11-25 18:23:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2109 transitions. [2021-11-25 18:23:48,398 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2109 transitions. Word has length 131 [2021-11-25 18:23:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:48,398 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 2109 transitions. [2021-11-25 18:23:48,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-25 18:23:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2109 transitions. [2021-11-25 18:23:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-25 18:23:48,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:48,411 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:48,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:48,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:48,633 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:23:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash 357893546, now seen corresponding path program 1 times [2021-11-25 18:23:48,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:48,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004299414] [2021-11-25 18:23:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:48,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-25 18:23:48,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:48,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004299414] [2021-11-25 18:23:48,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004299414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:48,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981139050] [2021-11-25 18:23:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:48,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:48,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:48,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:23:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:23:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-25 18:23:49,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-25 18:23:49,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981139050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403809925] [2021-11-25 18:23:50,007 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2021-11-25 18:23:50,007 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:50,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:23:50,008 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:23:50,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:23:55,076 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-25 18:24:02,803 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 47 for LOIs [2021-11-25 18:24:02,929 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2021-11-25 18:24:03,048 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 82 for LOIs [2021-11-25 18:24:03,591 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 25 for LOIs [2021-11-25 18:24:03,655 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 27 for LOIs [2021-11-25 18:24:03,666 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 70 for LOIs [2021-11-25 18:24:03,682 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-25 18:24:03,685 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-25 18:24:07,001 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:24:07,537 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 57 for LOIs [2021-11-25 18:24:07,588 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2021-11-25 18:24:07,591 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:24:07,732 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:24,354 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:24:30,037 WARN L227 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:10,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48611#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 |#NULL.base|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 ~head~0.offset) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= 4 ~executiveFloor~0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 12 ~cleanupTimeShifts~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (<= |#NULL.base| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)))' at error location [2021-11-25 18:25:10,474 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:25:10,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:25:10,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-11-25 18:25:10,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353213802] [2021-11-25 18:25:10,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:25:10,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:25:10,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:25:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:25:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1072, Invalid=13690, Unknown=0, NotChecked=0, Total=14762 [2021-11-25 18:25:10,481 INFO L87 Difference]: Start difference. First operand 1456 states and 2109 transitions. Second operand has 26 states, 20 states have (on average 10.35) internal successors, (207), 22 states have internal predecessors, (207), 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) [2021-11-25 18:25:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:23,668 INFO L93 Difference]: Finished difference Result 5397 states and 8118 transitions. [2021-11-25 18:25:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-25 18:25:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.35) internal successors, (207), 22 states have internal predecessors, (207), 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 [2021-11-25 18:25:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:23,701 INFO L225 Difference]: With dead ends: 5397 [2021-11-25 18:25:23,701 INFO L226 Difference]: Without dead ends: 3954 [2021-11-25 18:25:23,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 492 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13047 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=2287, Invalid=30655, Unknown=0, NotChecked=0, Total=32942 [2021-11-25 18:25:23,724 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 5602 mSDsluCounter, 5901 mSDsCounter, 0 mSdLazyCounter, 20008 mSolverCounterSat, 4238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5624 SdHoareTripleChecker+Valid, 6341 SdHoareTripleChecker+Invalid, 24246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4238 IncrementalHoareTripleChecker+Valid, 20008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:23,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5624 Valid, 6341 Invalid, 24246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4238 Valid, 20008 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2021-11-25 18:25:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-11-25 18:25:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3614. [2021-11-25 18:25:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3614 states, 2626 states have (on average 1.4120335110434121) internal successors, (3708), 2706 states have internal predecessors, (3708), 694 states have call successors, (694), 302 states have call predecessors, (694), 293 states have return successors, (805), 665 states have call predecessors, (805), 686 states have call successors, (805) [2021-11-25 18:25:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3614 states to 3614 states and 5207 transitions. [2021-11-25 18:25:23,968 INFO L78 Accepts]: Start accepts. Automaton has 3614 states and 5207 transitions. Word has length 188 [2021-11-25 18:25:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:23,969 INFO L470 AbstractCegarLoop]: Abstraction has 3614 states and 5207 transitions. [2021-11-25 18:25:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.35) internal successors, (207), 22 states have internal predecessors, (207), 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) [2021-11-25 18:25:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3614 states and 5207 transitions. [2021-11-25 18:25:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-25 18:25:24,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:24,002 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:25:24,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:25:24,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:25:24,229 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:25:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash -112349873, now seen corresponding path program 1 times [2021-11-25 18:25:24,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:24,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501743782] [2021-11-25 18:25:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:24,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-25 18:25:24,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:24,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501743782] [2021-11-25 18:25:24,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501743782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:24,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498705991] [2021-11-25 18:25:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:24,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:24,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:24,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:25:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:25:24,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 98 proven. 18 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-25 18:25:25,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:25:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-25 18:25:25,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498705991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:25:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327012227] [2021-11-25 18:25:25,725 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2021-11-25 18:25:25,726 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:25:25,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:25:25,727 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:25:25,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:25:31,560 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-25 18:25:40,776 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 47 for LOIs [2021-11-25 18:25:40,858 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2021-11-25 18:25:40,955 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-25 18:25:41,462 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 20 for LOIs [2021-11-25 18:25:41,539 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 27 for LOIs [2021-11-25 18:25:41,554 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 85 for LOIs [2021-11-25 18:25:41,579 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-25 18:25:41,582 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-25 18:25:44,928 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:25:45,578 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 57 for LOIs [2021-11-25 18:25:45,642 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2021-11-25 18:25:45,646 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:25:45,786 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:02,311 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:26:07,924 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:26:52,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62790#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 ~head~0.offset) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= ~currentFloorID~0 2147483647) (<= 4 ~executiveFloor~0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 12 ~cleanupTimeShifts~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (<= |#NULL.base| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)))' at error location [2021-11-25 18:26:52,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:52,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:52,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-25 18:26:52,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746444870] [2021-11-25 18:26:52,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:52,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:26:52,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:52,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:26:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=12202, Unknown=0, NotChecked=0, Total=13340 [2021-11-25 18:26:52,109 INFO L87 Difference]: Start difference. First operand 3614 states and 5207 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) [2021-11-25 18:26:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:56,978 INFO L93 Difference]: Finished difference Result 7212 states and 10465 transitions. [2021-11-25 18:26:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 18:26:56,979 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 [2021-11-25 18:26:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:57,015 INFO L225 Difference]: With dead ends: 7212 [2021-11-25 18:26:57,015 INFO L226 Difference]: Without dead ends: 4618 [2021-11-25 18:26:57,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 639 SyntacticMatches, 8 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6705 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=1479, Invalid=17153, Unknown=0, NotChecked=0, Total=18632 [2021-11-25 18:26:57,034 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 3058 mSDsluCounter, 10634 mSDsCounter, 0 mSdLazyCounter, 6642 mSolverCounterSat, 2120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 10846 SdHoareTripleChecker+Invalid, 8762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2120 IncrementalHoareTripleChecker+Valid, 6642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:57,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 10846 Invalid, 8762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2120 Valid, 6642 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 18:26:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4618 states. [2021-11-25 18:26:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4618 to 4502. [2021-11-25 18:26:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 3271 states have (on average 1.3946805258330786) internal successors, (4562), 3354 states have internal predecessors, (4562), 849 states have call successors, (849), 392 states have call predecessors, (849), 381 states have return successors, (1044), 815 states have call predecessors, (1044), 839 states have call successors, (1044) [2021-11-25 18:26:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 6455 transitions. [2021-11-25 18:26:57,386 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 6455 transitions. Word has length 246 [2021-11-25 18:26:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:57,387 INFO L470 AbstractCegarLoop]: Abstraction has 4502 states and 6455 transitions. [2021-11-25 18:26:57,388 INFO L471 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) [2021-11-25 18:26:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 6455 transitions. [2021-11-25 18:26:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-25 18:26:57,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:57,431 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 14, 14, 6, 6, 6, 6, 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, 4, 4, 4, 4, 3, 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] [2021-11-25 18:26:57,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:57,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:26:57,645 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash 702048970, now seen corresponding path program 1 times [2021-11-25 18:26:57,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:57,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798954466] [2021-11-25 18:26:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:57,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 50 proven. 24 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2021-11-25 18:26:57,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798954466] [2021-11-25 18:26:57,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798954466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707196598] [2021-11-25 18:26:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:57,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:57,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:57,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:26:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 3385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:26:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2021-11-25 18:26:58,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:26:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707196598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:58,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:26:58,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:26:58,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694138863] [2021-11-25 18:26:58,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:58,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:26:58,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:26:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:26:58,921 INFO L87 Difference]: Start difference. First operand 4502 states and 6455 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 18:26:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:59,331 INFO L93 Difference]: Finished difference Result 8014 states and 11535 transitions. [2021-11-25 18:26:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:26:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 396 [2021-11-25 18:26:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:59,376 INFO L225 Difference]: With dead ends: 8014 [2021-11-25 18:26:59,376 INFO L226 Difference]: Without dead ends: 4600 [2021-11-25 18:26:59,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:26:59,392 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 350 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:59,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 995 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:26:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-11-25 18:26:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4578. [2021-11-25 18:26:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 3321 states have (on average 1.37548931044866) internal successors, (4568), 3404 states have internal predecessors, (4568), 863 states have call successors, (863), 404 states have call predecessors, (863), 393 states have return successors, (1056), 829 states have call predecessors, (1056), 853 states have call successors, (1056) [2021-11-25 18:26:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 6487 transitions. [2021-11-25 18:26:59,693 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 6487 transitions. Word has length 396 [2021-11-25 18:26:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:59,694 INFO L470 AbstractCegarLoop]: Abstraction has 4578 states and 6487 transitions. [2021-11-25 18:26:59,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 18:26:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 6487 transitions. [2021-11-25 18:26:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-25 18:26:59,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:59,727 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:59,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-25 18:26:59,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:26:59,941 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash 189157901, now seen corresponding path program 1 times [2021-11-25 18:26:59,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:59,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73585668] [2021-11-25 18:26:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:59,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-25 18:27:00,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:00,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73585668] [2021-11-25 18:27:00,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73585668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:00,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:00,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:27:00,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250818168] [2021-11-25 18:27:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:00,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:27:00,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:27:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:00,073 INFO L87 Difference]: Start difference. First operand 4578 states and 6487 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 18:27:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:00,542 INFO L93 Difference]: Finished difference Result 9762 states and 14286 transitions. [2021-11-25 18:27:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:27:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 260 [2021-11-25 18:27:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:00,571 INFO L225 Difference]: With dead ends: 9762 [2021-11-25 18:27:00,572 INFO L226 Difference]: Without dead ends: 4654 [2021-11-25 18:27:00,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:27:00,597 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 418 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:00,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1692 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:27:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-11-25 18:27:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4638. [2021-11-25 18:27:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 3351 states have (on average 1.3303491495076096) internal successors, (4458), 3464 states have internal predecessors, (4458), 863 states have call successors, (863), 404 states have call predecessors, (863), 423 states have return successors, (1089), 829 states have call predecessors, (1089), 853 states have call successors, (1089) [2021-11-25 18:27:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 6410 transitions. [2021-11-25 18:27:00,896 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 6410 transitions. Word has length 260 [2021-11-25 18:27:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:00,897 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 6410 transitions. [2021-11-25 18:27:00,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 3 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 18:27:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 6410 transitions. [2021-11-25 18:27:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-25 18:27:00,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:00,933 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 6, 6, 6, 6, 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, 3, 3, 3, 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] [2021-11-25 18:27:00,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:27:00,933 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:00,934 INFO L85 PathProgramCache]: Analyzing trace with hash -979624741, now seen corresponding path program 1 times [2021-11-25 18:27:00,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:00,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274619249] [2021-11-25 18:27:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:00,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-25 18:27:01,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:01,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274619249] [2021-11-25 18:27:01,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274619249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607004008] [2021-11-25 18:27:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:01,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:01,118 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:01,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:27:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:01,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:27:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 116 proven. 44 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-11-25 18:27:02,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:27:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2021-11-25 18:27:02,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607004008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:27:02,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292458066] [2021-11-25 18:27:02,958 INFO L159 IcfgInterpreter]: Started Sifa with 141 locations of interest [2021-11-25 18:27:02,958 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:27:02,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:27:02,959 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:27:02,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:27:10,470 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 550 for LOIs [2021-11-25 18:27:10,871 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2021-11-25 18:27:12,362 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2021-11-25 18:27:12,686 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 48 for LOIs [2021-11-25 18:27:12,745 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 37 for LOIs [2021-11-25 18:27:12,829 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 45 for LOIs [2021-11-25 18:27:12,927 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2021-11-25 18:27:12,935 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 51 for LOIs [2021-11-25 18:27:12,948 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2021-11-25 18:27:12,955 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-25 18:27:16,282 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 33 for LOIs [2021-11-25 18:27:16,333 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 52 for LOIs [2021-11-25 18:27:16,344 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 506 for LOIs [2021-11-25 18:27:18,653 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 770 for LOIs [2021-11-25 18:27:22,597 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 623 for LOIs [2021-11-25 18:27:23,027 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:27:37,149 WARN L227 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 623 DAG size of output: 504 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:45,634 WARN L227 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 663 DAG size of output: 518 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:51,403 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:57,246 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:12,051 WARN L227 SmtUtils]: Spent 13.38s on a formula simplification. DAG size of input: 770 DAG size of output: 638 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:18,457 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 773 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:13,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120767#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= 4 ~executiveFloor~0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2021-11-25 18:29:13,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:29:13,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:29:13,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2021-11-25 18:29:13,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916796081] [2021-11-25 18:29:13,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:29:13,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:29:13,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:29:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=15117, Unknown=0, NotChecked=0, Total=16256 [2021-11-25 18:29:13,530 INFO L87 Difference]: Start difference. First operand 4638 states and 6410 transitions. Second operand has 21 states, 17 states have (on average 13.941176470588236) internal successors, (237), 18 states have internal predecessors, (237), 8 states have call successors, (81), 5 states have call predecessors, (81), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) [2021-11-25 18:29:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:19,793 INFO L93 Difference]: Finished difference Result 9668 states and 13569 transitions. [2021-11-25 18:29:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 18:29:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 13.941176470588236) internal successors, (237), 18 states have internal predecessors, (237), 8 states have call successors, (81), 5 states have call predecessors, (81), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) Word has length 338 [2021-11-25 18:29:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:19,827 INFO L225 Difference]: With dead ends: 9668 [2021-11-25 18:29:19,827 INFO L226 Difference]: Without dead ends: 5312 [2021-11-25 18:29:19,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 877 SyntacticMatches, 35 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10297 ImplicationChecksByTransitivity, 112.6s TimeCoverageRelationStatistics Valid=1565, Invalid=24517, Unknown=0, NotChecked=0, Total=26082 [2021-11-25 18:29:19,852 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 2221 mSDsluCounter, 9658 mSDsCounter, 0 mSdLazyCounter, 5463 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2237 SdHoareTripleChecker+Valid, 9804 SdHoareTripleChecker+Invalid, 7043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 5463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:19,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2237 Valid, 9804 Invalid, 7043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 5463 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 18:29:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-11-25 18:29:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 5116. [2021-11-25 18:29:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 3712 states have (on average 1.3116918103448276) internal successors, (4869), 3829 states have internal predecessors, (4869), 920 states have call successors, (920), 440 states have call predecessors, (920), 483 states have return successors, (1268), 906 states have call predecessors, (1268), 910 states have call successors, (1268) [2021-11-25 18:29:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 7057 transitions. [2021-11-25 18:29:20,218 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 7057 transitions. Word has length 338 [2021-11-25 18:29:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:20,219 INFO L470 AbstractCegarLoop]: Abstraction has 5116 states and 7057 transitions. [2021-11-25 18:29:20,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 13.941176470588236) internal successors, (237), 18 states have internal predecessors, (237), 8 states have call successors, (81), 5 states have call predecessors, (81), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) [2021-11-25 18:29:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 7057 transitions. [2021-11-25 18:29:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-25 18:29:20,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:20,259 INFO L514 BasicCegarLoop]: trace histogram [17, 12, 12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:20,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:20,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:20,485 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1716947066, now seen corresponding path program 1 times [2021-11-25 18:29:20,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:20,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935714351] [2021-11-25 18:29:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:20,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-25 18:29:20,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935714351] [2021-11-25 18:29:20,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935714351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532852688] [2021-11-25 18:29:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:20,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:20,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:20,714 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:20,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:29:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:21,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 3068 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:29:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-25 18:29:21,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:29:21,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532852688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:21,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:29:21,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 18:29:21,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967118946] [2021-11-25 18:29:21,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:21,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:29:21,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:29:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:29:21,634 INFO L87 Difference]: Start difference. First operand 5116 states and 7057 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 18:29:22,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:22,038 INFO L93 Difference]: Finished difference Result 8960 states and 12421 transitions. [2021-11-25 18:29:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:29:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 364 [2021-11-25 18:29:22,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:22,069 INFO L225 Difference]: With dead ends: 8960 [2021-11-25 18:29:22,069 INFO L226 Difference]: Without dead ends: 5358 [2021-11-25 18:29:22,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:29:22,088 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 372 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:22,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 970 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:29:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5358 states. [2021-11-25 18:29:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5358 to 5336. [2021-11-25 18:29:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5336 states, 3870 states have (on average 1.2943152454780362) internal successors, (5009), 3993 states have internal predecessors, (5009), 954 states have call successors, (954), 464 states have call predecessors, (954), 511 states have return successors, (1297), 938 states have call predecessors, (1297), 944 states have call successors, (1297) [2021-11-25 18:29:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5336 states to 5336 states and 7260 transitions. [2021-11-25 18:29:22,440 INFO L78 Accepts]: Start accepts. Automaton has 5336 states and 7260 transitions. Word has length 364 [2021-11-25 18:29:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:22,441 INFO L470 AbstractCegarLoop]: Abstraction has 5336 states and 7260 transitions. [2021-11-25 18:29:22,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 18:29:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5336 states and 7260 transitions. [2021-11-25 18:29:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-25 18:29:22,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:22,471 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:22,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:22,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:29:22,685 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash 550947024, now seen corresponding path program 1 times [2021-11-25 18:29:22,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721091245] [2021-11-25 18:29:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:22,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-25 18:29:22,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:22,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721091245] [2021-11-25 18:29:22,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721091245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:22,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604676132] [2021-11-25 18:29:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:22,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:22,890 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:22,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:29:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:29:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-25 18:29:23,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:29:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-25 18:29:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604676132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:29:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131932681] [2021-11-25 18:29:24,284 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2021-11-25 18:29:24,284 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:29:24,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:29:24,285 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:29:24,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:29:29,372 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-25 18:29:35,962 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 47 for LOIs [2021-11-25 18:29:36,044 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2021-11-25 18:29:36,124 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 77 for LOIs [2021-11-25 18:29:36,276 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 20 for LOIs [2021-11-25 18:29:36,329 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 27 for LOIs [2021-11-25 18:29:36,340 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 70 for LOIs [2021-11-25 18:29:36,356 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-25 18:29:36,359 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-25 18:29:39,530 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:29:40,100 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 57 for LOIs [2021-11-25 18:29:40,174 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2021-11-25 18:29:40,178 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:29:40,317 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:29:56,931 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:02,585 WARN L227 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:30:40,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164658#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 ~head~0.offset) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= ~currentFloorID~0 2147483647) (<= 4 ~executiveFloor~0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= 12 ~cleanupTimeShifts~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (<= |#NULL.base| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)))' at error location [2021-11-25 18:30:40,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:30:40,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:30:40,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-25 18:30:40,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708494890] [2021-11-25 18:30:40,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:30:40,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 18:30:40,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 18:30:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=11153, Unknown=0, NotChecked=0, Total=11990 [2021-11-25 18:30:40,793 INFO L87 Difference]: Start difference. First operand 5336 states and 7260 transitions. Second operand has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2021-11-25 18:30:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:43,947 INFO L93 Difference]: Finished difference Result 8085 states and 10974 transitions. [2021-11-25 18:30:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:30:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) Word has length 251 [2021-11-25 18:30:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:43,983 INFO L225 Difference]: With dead ends: 8085 [2021-11-25 18:30:43,983 INFO L226 Difference]: Without dead ends: 5422 [2021-11-25 18:30:43,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 659 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5017 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=1028, Invalid=14224, Unknown=0, NotChecked=0, Total=15252 [2021-11-25 18:30:43,996 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 1497 mSDsluCounter, 5991 mSDsCounter, 0 mSdLazyCounter, 4138 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 4754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 4138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:43,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 6380 Invalid, 4754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 4138 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 18:30:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5422 states. [2021-11-25 18:30:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5422 to 5315. [2021-11-25 18:30:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 3849 states have (on average 1.2922837100545597) internal successors, (4974), 3972 states have internal predecessors, (4974), 954 states have call successors, (954), 464 states have call predecessors, (954), 511 states have return successors, (1297), 938 states have call predecessors, (1297), 944 states have call successors, (1297) [2021-11-25 18:30:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 7225 transitions. [2021-11-25 18:30:44,342 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 7225 transitions. Word has length 251 [2021-11-25 18:30:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:44,343 INFO L470 AbstractCegarLoop]: Abstraction has 5315 states and 7225 transitions. [2021-11-25 18:30:44,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2021-11-25 18:30:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 7225 transitions. [2021-11-25 18:30:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-25 18:30:44,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:44,369 INFO L514 BasicCegarLoop]: trace histogram [19, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:44,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:44,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:30:44,588 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash 191698097, now seen corresponding path program 1 times [2021-11-25 18:30:44,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521039865] [2021-11-25 18:30:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:44,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2021-11-25 18:30:44,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521039865] [2021-11-25 18:30:44,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521039865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:44,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985064041] [2021-11-25 18:30:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:44,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:44,817 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:44,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:30:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 3104 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:30:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-11-25 18:30:45,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:30:45,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985064041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:45,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:30:45,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 18:30:45,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826344286] [2021-11-25 18:30:45,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:45,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:45,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:30:45,832 INFO L87 Difference]: Start difference. First operand 5315 states and 7225 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-25 18:30:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:46,220 INFO L93 Difference]: Finished difference Result 8507 states and 11614 transitions. [2021-11-25 18:30:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 381 [2021-11-25 18:30:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:46,245 INFO L225 Difference]: With dead ends: 8507 [2021-11-25 18:30:46,246 INFO L226 Difference]: Without dead ends: 5143 [2021-11-25 18:30:46,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:30:46,261 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 386 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:46,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 973 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:30:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5143 states. [2021-11-25 18:30:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5143 to 5121. [2021-11-25 18:30:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 3697 states have (on average 1.2891533675953475) internal successors, (4766), 3816 states have internal predecessors, (4766), 928 states have call successors, (928), 452 states have call predecessors, (928), 495 states have return successors, (1245), 912 states have call predecessors, (1245), 918 states have call successors, (1245) [2021-11-25 18:30:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 6939 transitions. [2021-11-25 18:30:46,580 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 6939 transitions. Word has length 381 [2021-11-25 18:30:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:46,580 INFO L470 AbstractCegarLoop]: Abstraction has 5121 states and 6939 transitions. [2021-11-25 18:30:46,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-25 18:30:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 6939 transitions. [2021-11-25 18:30:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-25 18:30:46,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:46,606 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:46,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:46,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:46,821 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1352739057, now seen corresponding path program 1 times [2021-11-25 18:30:46,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:46,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267814310] [2021-11-25 18:30:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:46,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-25 18:30:46,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267814310] [2021-11-25 18:30:46,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267814310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577707968] [2021-11-25 18:30:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:46,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:46,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:47,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8adb0e44-b4d6-4c19-944b-1d4554df38f4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:30:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:47,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 18:30:47,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 121 proven. 20 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2021-11-25 18:30:47,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-25 18:30:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577707968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:30:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283096707] [2021-11-25 18:30:48,359 INFO L159 IcfgInterpreter]: Started Sifa with 133 locations of interest [2021-11-25 18:30:48,359 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:48,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:30:48,360 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:30:48,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:30:53,686 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2021-11-25 18:31:03,824 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 59 for LOIs [2021-11-25 18:31:04,253 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 24 for LOIs [2021-11-25 18:31:04,299 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 78 for LOIs [2021-11-25 18:31:04,409 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 20 for LOIs [2021-11-25 18:31:04,457 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 45 for LOIs [2021-11-25 18:31:04,474 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 97 for LOIs [2021-11-25 18:31:04,492 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 24 for LOIs [2021-11-25 18:31:04,495 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2021-11-25 18:31:07,720 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:31:08,277 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 73 for LOIs [2021-11-25 18:31:08,732 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 45 for LOIs [2021-11-25 18:31:08,738 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:31:08,876 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 39 for LOIs [2021-11-25 18:31:08,880 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:31:25,068 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)