./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.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_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/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_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/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_0b3cce76-e5ee-49bf-b257-57929050799b/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 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:07:03,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:07:03,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:07:03,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:07:03,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:07:03,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:07:03,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:07:03,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:07:03,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:07:03,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:07:03,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:07:03,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:07:03,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:07:03,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:07:03,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:07:03,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:07:03,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:07:03,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:07:03,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:07:03,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:07:03,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:07:03,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:07:03,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:07:03,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:07:03,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:07:03,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:07:03,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:07:03,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:07:03,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:07:03,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:07:03,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:07:03,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:07:03,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:07:03,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:07:03,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:07:03,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:07:03,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:07:03,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:07:03,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:07:03,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:07:03,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:07:03,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:07:03,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:07:03,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:07:03,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:07:03,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:07:03,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:07:03,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:07:03,702 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:07:03,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:07:03,703 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:07:03,703 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:07:03,704 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:07:03,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:07:03,704 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:07:03,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:07:03,704 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:07:03,705 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:07:03,705 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:07:03,705 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:07:03,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:07:03,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:07:03,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:07:03,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:07:03,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:07:03,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:07:03,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:07:03,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:07:03,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:07:03,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:07:03,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:07:03,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:07:03,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:07:03,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:07:03,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:07:03,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:07:03,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:07:03,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:07:03,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:07:03,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:07:03,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:07:03,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:07:03,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:07:03,712 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_0b3cce76-e5ee-49bf-b257-57929050799b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-25 20:07:03,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:07:03,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:07:03,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:07:03,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:07:03,982 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:07:03,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-25 20:07:04,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/data/1b175c331/b7b224285568440683d714e507fec748/FLAG47260805d [2021-11-25 20:07:04,691 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:07:04,692 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-25 20:07:04,726 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/data/1b175c331/b7b224285568440683d714e507fec748/FLAG47260805d [2021-11-25 20:07:04,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/data/1b175c331/b7b224285568440683d714e507fec748 [2021-11-25 20:07:04,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:07:04,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:07:04,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:07:04,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:07:04,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:07:04,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:07:04" (1/1) ... [2021-11-25 20:07:04,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68531fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:04, skipping insertion in model container [2021-11-25 20:07:04,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:07:04" (1/1) ... [2021-11-25 20:07:04,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:07:04,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:07:05,263 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_0b3cce76-e5ee-49bf-b257-57929050799b/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-25 20:07:05,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:07:05,641 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:07:05,688 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_0b3cce76-e5ee-49bf-b257-57929050799b/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-25 20:07:05,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:07:05,840 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:07:05,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05 WrapperNode [2021-11-25 20:07:05,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:07:05,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:07:05,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:07:05,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:07:05,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:05,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:05,960 INFO L137 Inliner]: procedures = 97, calls = 350, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 955 [2021-11-25 20:07:05,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:07:05,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:07:05,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:07:05,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:07:05,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:05,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:05,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:05,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:06,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:06,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:06,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:06,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:07:06,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:07:06,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:07:06,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:07:06,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (1/1) ... [2021-11-25 20:07:06,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:07:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:06,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:07:06,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:07:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:07:06,183 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:07:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:07:06,183 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:07:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:07:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:07:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 20:07:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 20:07:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:07:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:07:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:07:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:07:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:07:06,185 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:07:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:07:06,185 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:07:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:07:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:07:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:07:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:07:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:07:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:07:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 20:07:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 20:07:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:07:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:07:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:07:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:07:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:07:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:07:06,188 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:07:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:07:06,188 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:07:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:07:06,188 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:07:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 20:07:06,189 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 20:07:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:07:06,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:07:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:07:06,189 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:07:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:07:06,190 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:07:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:07:06,190 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:07:06,191 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:07:06,191 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:07:06,192 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:07:06,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:07:06,193 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:07:06,193 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:07:06,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:07:06,193 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:07:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:07:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:07:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:07:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:07:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:07:06,341 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:07:06,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:07:07,573 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:07:08,219 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:07:08,220 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:07:08,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:07:08 BoogieIcfgContainer [2021-11-25 20:07:08,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:07:08,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:07:08,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:07:08,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:07:08,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:07:04" (1/3) ... [2021-11-25 20:07:08,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@924741b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:07:08, skipping insertion in model container [2021-11-25 20:07:08,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:07:05" (2/3) ... [2021-11-25 20:07:08,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@924741b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:07:08, skipping insertion in model container [2021-11-25 20:07:08,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:07:08" (3/3) ... [2021-11-25 20:07:08,236 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2021-11-25 20:07:08,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:07:08,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:07:08,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:07:08,344 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 20:07:08,344 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:07:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-25 20:07:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 20:07:08,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:08,415 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:07:08,415 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2066510140, now seen corresponding path program 1 times [2021-11-25 20:07:08,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:08,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523590105] [2021-11-25 20:07:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:08,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:07:08,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:08,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523590105] [2021-11-25 20:07:08,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523590105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:08,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:08,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:07:08,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314655835] [2021-11-25 20:07:08,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:08,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:07:08,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:07:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:07:09,015 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-25 20:07:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:09,244 INFO L93 Difference]: Finished difference Result 422 states and 661 transitions. [2021-11-25 20:07:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:07:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2021-11-25 20:07:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:09,270 INFO L225 Difference]: With dead ends: 422 [2021-11-25 20:07:09,271 INFO L226 Difference]: Without dead ends: 400 [2021-11-25 20:07:09,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:07:09,278 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:09,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 589 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:07:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-25 20:07:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-11-25 20:07:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 268 states have (on average 1.5597014925373134) internal successors, (418), 287 states have internal predecessors, (418), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-25 20:07:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 623 transitions. [2021-11-25 20:07:09,380 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 623 transitions. Word has length 88 [2021-11-25 20:07:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:09,382 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 623 transitions. [2021-11-25 20:07:09,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-25 20:07:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 623 transitions. [2021-11-25 20:07:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 20:07:09,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:09,393 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:07:09,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:07:09,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1438810213, now seen corresponding path program 1 times [2021-11-25 20:07:09,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:09,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073586700] [2021-11-25 20:07:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:09,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:07:09,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:09,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073586700] [2021-11-25 20:07:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073586700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:09,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:09,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:07:09,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249434231] [2021-11-25 20:07:09,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:09,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:07:09,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:09,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:07:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:07:09,615 INFO L87 Difference]: Start difference. First operand 400 states and 623 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:07:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:12,037 INFO L93 Difference]: Finished difference Result 1217 states and 1930 transitions. [2021-11-25 20:07:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:07:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2021-11-25 20:07:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:12,048 INFO L225 Difference]: With dead ends: 1217 [2021-11-25 20:07:12,048 INFO L226 Difference]: Without dead ends: 840 [2021-11-25 20:07:12,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:07:12,054 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 1192 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1921 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:12,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1921 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:07:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-25 20:07:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2021-11-25 20:07:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 540 states have (on average 1.5740740740740742) internal successors, (850), 573 states have internal predecessors, (850), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2021-11-25 20:07:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1253 transitions. [2021-11-25 20:07:12,143 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1253 transitions. Word has length 89 [2021-11-25 20:07:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:12,143 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1253 transitions. [2021-11-25 20:07:12,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:07:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1253 transitions. [2021-11-25 20:07:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:07:12,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:12,149 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:07:12,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:07:12,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash 228903843, now seen corresponding path program 1 times [2021-11-25 20:07:12,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:12,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757922477] [2021-11-25 20:07:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:12,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:07:12,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757922477] [2021-11-25 20:07:12,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757922477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:12,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:12,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:07:12,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597480194] [2021-11-25 20:07:12,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:12,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:07:12,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:07:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:07:12,314 INFO L87 Difference]: Start difference. First operand 791 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:07:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:12,832 INFO L93 Difference]: Finished difference Result 862 states and 1365 transitions. [2021-11-25 20:07:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:07:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2021-11-25 20:07:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:12,842 INFO L225 Difference]: With dead ends: 862 [2021-11-25 20:07:12,843 INFO L226 Difference]: Without dead ends: 847 [2021-11-25 20:07:12,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:12,850 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 715 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:12,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 1547 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:07:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-25 20:07:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 795. [2021-11-25 20:07:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5698529411764706) internal successors, (854), 577 states have internal predecessors, (854), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2021-11-25 20:07:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1257 transitions. [2021-11-25 20:07:12,934 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1257 transitions. Word has length 93 [2021-11-25 20:07:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:12,935 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1257 transitions. [2021-11-25 20:07:12,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:07:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1257 transitions. [2021-11-25 20:07:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:07:12,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:12,939 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:07:12,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:07:12,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1654676781, now seen corresponding path program 1 times [2021-11-25 20:07:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:12,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509155783] [2021-11-25 20:07:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:12,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:07:13,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:13,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509155783] [2021-11-25 20:07:13,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509155783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:13,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:13,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:07:13,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496008223] [2021-11-25 20:07:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:13,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:07:13,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:07:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:07:13,100 INFO L87 Difference]: Start difference. First operand 795 states and 1257 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-25 20:07:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:13,295 INFO L93 Difference]: Finished difference Result 814 states and 1281 transitions. [2021-11-25 20:07:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:07:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2021-11-25 20:07:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:13,306 INFO L225 Difference]: With dead ends: 814 [2021-11-25 20:07:13,306 INFO L226 Difference]: Without dead ends: 799 [2021-11-25 20:07:13,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:07:13,308 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 41 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:13,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 2891 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:07:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-11-25 20:07:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 795. [2021-11-25 20:07:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5661764705882353) internal successors, (852), 577 states have internal predecessors, (852), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2021-11-25 20:07:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1255 transitions. [2021-11-25 20:07:13,368 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1255 transitions. Word has length 98 [2021-11-25 20:07:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:13,368 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1255 transitions. [2021-11-25 20:07:13,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-25 20:07:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1255 transitions. [2021-11-25 20:07:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 20:07:13,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:13,373 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-25 20:07:13,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:07:13,373 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1277274216, now seen corresponding path program 1 times [2021-11-25 20:07:13,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:13,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271096586] [2021-11-25 20:07:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:13,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:07:14,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271096586] [2021-11-25 20:07:14,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271096586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040857513] [2021-11-25 20:07:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:14,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:14,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:14,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:07:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:07:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:07:14,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:07:14,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040857513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:14,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:07:14,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [23] total 25 [2021-11-25 20:07:14,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862962936] [2021-11-25 20:07:14,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:14,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:07:14,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:14,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:07:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:07:14,923 INFO L87 Difference]: Start difference. First operand 795 states and 1255 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-25 20:07:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:15,134 INFO L93 Difference]: Finished difference Result 878 states and 1379 transitions. [2021-11-25 20:07:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:07:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 105 [2021-11-25 20:07:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:15,148 INFO L225 Difference]: With dead ends: 878 [2021-11-25 20:07:15,162 INFO L226 Difference]: Without dead ends: 863 [2021-11-25 20:07:15,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:07:15,164 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 44 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:15,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1816 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:07:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-25 20:07:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 799. [2021-11-25 20:07:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 548 states have (on average 1.562043795620438) internal successors, (856), 581 states have internal predecessors, (856), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2021-11-25 20:07:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2021-11-25 20:07:15,250 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 105 [2021-11-25 20:07:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:15,250 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2021-11-25 20:07:15,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-25 20:07:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2021-11-25 20:07:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:07:15,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:15,257 INFO L514 BasicCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:15,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:07:15,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:15,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:07:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1797913455, now seen corresponding path program 1 times [2021-11-25 20:07:15,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:15,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569866116] [2021-11-25 20:07:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:15,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-25 20:07:15,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:15,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569866116] [2021-11-25 20:07:15,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569866116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370114290] [2021-11-25 20:07:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:15,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:15,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:15,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b3cce76-e5ee-49bf-b257-57929050799b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:07:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-25 20:07:16,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:07:18,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:14,014 WARN L227 SmtUtils]: Spent 50.92s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:09:05,334 WARN L227 SmtUtils]: Spent 50.79s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:09:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 20:09:06,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370114290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758854950] [2021-11-25 20:09:06,150 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2021-11-25 20:09:06,151 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:06,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:06,161 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:06,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:09:26,058 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 534 for LOIs [2021-11-25 20:09:26,737 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2021-11-25 20:12:46,080 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 586 for LOIs [2021-11-25 20:12:54,247 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 447 for LOIs [2021-11-25 20:12:56,213 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 501 for LOIs [2021-11-25 20:12:58,044 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 78 for LOIs [2021-11-25 20:12:58,064 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 73 for LOIs [2021-11-25 20:12:58,075 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 593 for LOIs [2021-11-25 20:13:01,578 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 491 for LOIs [2021-11-25 20:13:02,155 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 455 for LOIs [2021-11-25 20:13:03,053 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 449 for LOIs [2021-11-25 20:13:03,131 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 556 for LOIs [2021-11-25 20:13:05,723 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 833 for LOIs [2021-11-25 20:13:11,308 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 660 for LOIs [2021-11-25 20:13:11,732 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:32,383 WARN L227 SmtUtils]: Spent 8.86s on a formula simplification. DAG size of input: 660 DAG size of output: 521 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:13:42,772 WARN L227 SmtUtils]: Spent 9.32s on a formula simplification. DAG size of input: 700 DAG size of output: 535 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:13:49,015 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:13:55,269 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:14:06,050 WARN L227 SmtUtils]: Spent 8.60s on a formula simplification. DAG size of input: 833 DAG size of output: 684 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:14:13,562 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 836 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:58,748 WARN L227 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 604 DAG size of output: 534 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)