./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P --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 be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:46:34,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:46:34,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:46:34,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:46:34,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:46:34,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:46:34,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:46:34,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:46:34,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:46:34,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:46:34,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:46:34,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:46:34,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:46:34,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:46:34,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:46:34,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:46:34,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:46:34,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:46:34,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:46:34,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:46:34,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:46:34,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:46:34,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:46:34,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:46:34,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:46:34,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:46:34,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:46:34,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:46:34,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:46:34,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:46:34,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:46:34,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:46:34,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:46:34,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:46:34,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:46:34,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:46:34,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:46:34,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:46:34,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:46:34,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:46:34,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:46:34,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:46:34,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:46:34,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:46:34,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:46:34,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:46:34,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:46:34,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:46:34,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:46:34,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:46:34,526 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:46:34,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:46:34,526 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:46:34,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:46:34,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:46:34,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:46:34,527 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:46:34,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:46:34,527 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:46:34,528 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:46:34,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:46:34,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:46:34,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:46:34,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:46:34,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:46:34,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:46:34,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:46:34,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:46:34,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:46:34,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:46:34,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:46:34,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:46:34,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:46:34,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:46:34,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:34,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:46:34,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:46:34,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:46:34,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:46:34,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:46:34,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:46:34,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:46:34,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:46:34,534 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_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-20 22:46:34,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:46:34,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:46:34,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:46:34,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:46:34,805 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:46:34,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-20 22:46:34,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/data/59ae4cc34/dd9178fffde34418bc3d045cf5db5081/FLAG98c9beb0e [2021-11-20 22:46:35,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:46:35,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-20 22:46:35,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/data/59ae4cc34/dd9178fffde34418bc3d045cf5db5081/FLAG98c9beb0e [2021-11-20 22:46:35,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/data/59ae4cc34/dd9178fffde34418bc3d045cf5db5081 [2021-11-20 22:46:35,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:46:35,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:46:35,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:35,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:46:35,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:46:35,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:35" (1/1) ... [2021-11-20 22:46:35,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76dcdbc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:35, skipping insertion in model container [2021-11-20 22:46:35,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:35" (1/1) ... [2021-11-20 22:46:35,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:46:35,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:46:36,618 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_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-20 22:46:36,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:36,644 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:46:36,757 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_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-20 22:46:36,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:36,797 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:46:36,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36 WrapperNode [2021-11-20 22:46:36,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:36,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:36,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:46:36,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:46:36,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,921 INFO L137 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 911 [2021-11-20 22:46:36,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:36,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:46:36,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:46:36,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:46:36,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:36,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:37,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:37,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:46:37,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:46:37,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:46:37,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:46:37,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (1/1) ... [2021-11-20 22:46:37,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:37,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:46:37,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:46:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 22:46:37,120 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 22:46:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:46:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-20 22:46:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-20 22:46:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 22:46:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 22:46:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 22:46:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 22:46:37,121 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 22:46:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 22:46:37,122 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-20 22:46:37,122 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-20 22:46:37,122 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 22:46:37,122 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 22:46:37,122 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 22:46:37,123 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 22:46:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 22:46:37,123 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 22:46:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 22:46:37,123 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 22:46:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 22:46:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 22:46:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 22:46:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 22:46:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 22:46:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 22:46:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 22:46:37,125 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 22:46:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 22:46:37,125 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 22:46:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 22:46:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 22:46:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 22:46:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 22:46:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 22:46:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 22:46:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 22:46:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 22:46:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 22:46:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 22:46:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 22:46:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 22:46:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:46:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-20 22:46:37,129 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-20 22:46:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 22:46:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 22:46:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 22:46:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 22:46:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 22:46:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 22:46:37,132 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-20 22:46:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-20 22:46:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:46:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:46:37,133 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 22:46:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 22:46:37,390 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:46:37,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:46:38,455 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:46:39,001 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:46:39,001 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 22:46:39,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:39 BoogieIcfgContainer [2021-11-20 22:46:39,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:46:39,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:46:39,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:46:39,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:46:39,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:35" (1/3) ... [2021-11-20 22:46:39,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5539f2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:39, skipping insertion in model container [2021-11-20 22:46:39,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:36" (2/3) ... [2021-11-20 22:46:39,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5539f2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:39, skipping insertion in model container [2021-11-20 22:46:39,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:39" (3/3) ... [2021-11-20 22:46:39,012 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2021-11-20 22:46:39,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:46:39,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:46:39,065 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:46:39,072 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 [2021-11-20 22:46:39,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:46:39,098 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) [2021-11-20 22:46:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 22:46:39,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:39,139 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] [2021-11-20 22:46:39,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1891006212, now seen corresponding path program 1 times [2021-11-20 22:46:39,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218509619] [2021-11-20 22:46:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:39,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 22:46:39,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218509619] [2021-11-20 22:46:39,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218509619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:39,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:39,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:46:39,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413789946] [2021-11-20 22:46:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:39,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 22:46:39,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:39,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 22:46:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:46:39,743 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) [2021-11-20 22:46:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:39,952 INFO L93 Difference]: Finished difference Result 422 states and 661 transitions. [2021-11-20 22:46:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 22:46:39,954 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 [2021-11-20 22:46:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:39,975 INFO L225 Difference]: With dead ends: 422 [2021-11-20 22:46:39,976 INFO L226 Difference]: Without dead ends: 400 [2021-11-20 22:46:39,979 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 [2021-11-20 22:46:39,983 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 [2021-11-20 22:46:39,984 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] [2021-11-20 22:46:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-20 22:46:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-11-20 22:46:40,072 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) [2021-11-20 22:46:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 623 transitions. [2021-11-20 22:46:40,093 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 623 transitions. Word has length 88 [2021-11-20 22:46:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:40,095 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 623 transitions. [2021-11-20 22:46:40,096 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) [2021-11-20 22:46:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 623 transitions. [2021-11-20 22:46:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 22:46:40,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:40,113 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] [2021-11-20 22:46:40,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:46:40,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash 841970578, now seen corresponding path program 1 times [2021-11-20 22:46:40,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:40,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245625352] [2021-11-20 22:46:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:40,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 22:46:40,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245625352] [2021-11-20 22:46:40,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245625352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:40,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:40,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 22:46:40,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484567667] [2021-11-20 22:46:40,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:40,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:46:40,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:46:40,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:46:40,413 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) [2021-11-20 22:46:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:42,645 INFO L93 Difference]: Finished difference Result 1217 states and 1930 transitions. [2021-11-20 22:46:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:46:42,646 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 [2021-11-20 22:46:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:42,664 INFO L225 Difference]: With dead ends: 1217 [2021-11-20 22:46:42,664 INFO L226 Difference]: Without dead ends: 840 [2021-11-20 22:46:42,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:46:42,672 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 1192 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:42,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1921 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 22:46:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-20 22:46:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2021-11-20 22:46:42,741 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) [2021-11-20 22:46:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1253 transitions. [2021-11-20 22:46:42,750 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1253 transitions. Word has length 89 [2021-11-20 22:46:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:42,751 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1253 transitions. [2021-11-20 22:46:42,751 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) [2021-11-20 22:46:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1253 transitions. [2021-11-20 22:46:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 22:46:42,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:42,758 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] [2021-11-20 22:46:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:46:42,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1641248, now seen corresponding path program 1 times [2021-11-20 22:46:42,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683416190] [2021-11-20 22:46:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:42,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 22:46:42,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:42,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683416190] [2021-11-20 22:46:42,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683416190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:42,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:42,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:46:42,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741915718] [2021-11-20 22:46:42,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:42,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:46:42,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:46:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:46:42,988 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) [2021-11-20 22:46:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:43,554 INFO L93 Difference]: Finished difference Result 862 states and 1365 transitions. [2021-11-20 22:46:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:46:43,555 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 [2021-11-20 22:46:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:43,567 INFO L225 Difference]: With dead ends: 862 [2021-11-20 22:46:43,567 INFO L226 Difference]: Without dead ends: 847 [2021-11-20 22:46:43,568 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 [2021-11-20 22:46:43,578 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:43,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 1547 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:46:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-20 22:46:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 795. [2021-11-20 22:46:43,650 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) [2021-11-20 22:46:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1257 transitions. [2021-11-20 22:46:43,664 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1257 transitions. Word has length 93 [2021-11-20 22:46:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:43,665 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1257 transitions. [2021-11-20 22:46:43,665 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) [2021-11-20 22:46:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1257 transitions. [2021-11-20 22:46:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 22:46:43,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:43,670 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] [2021-11-20 22:46:43,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:46:43,671 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1200315626, now seen corresponding path program 1 times [2021-11-20 22:46:43,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480687617] [2021-11-20 22:46:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:43,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 22:46:43,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:43,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480687617] [2021-11-20 22:46:43,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480687617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:43,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:43,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:46:43,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506393044] [2021-11-20 22:46:43,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:43,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:46:43,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:46:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:46:43,856 INFO L87 Difference]: Start difference. First operand 795 states and 1257 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-20 22:46:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:44,000 INFO L93 Difference]: Finished difference Result 814 states and 1281 transitions. [2021-11-20 22:46:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:46:44,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 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 [2021-11-20 22:46:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:44,009 INFO L225 Difference]: With dead ends: 814 [2021-11-20 22:46:44,009 INFO L226 Difference]: Without dead ends: 799 [2021-11-20 22:46:44,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:46:44,012 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 30 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:44,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2316 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:46:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-11-20 22:46:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 795. [2021-11-20 22:46:44,052 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) [2021-11-20 22:46:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1255 transitions. [2021-11-20 22:46:44,060 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1255 transitions. Word has length 98 [2021-11-20 22:46:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1255 transitions. [2021-11-20 22:46:44,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-20 22:46:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1255 transitions. [2021-11-20 22:46:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 22:46:44,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:44,065 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] [2021-11-20 22:46:44,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:46:44,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash 826927623, now seen corresponding path program 1 times [2021-11-20 22:46:44,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:44,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862668474] [2021-11-20 22:46:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:44,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 22:46:45,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:45,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862668474] [2021-11-20 22:46:45,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862668474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:45,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895512144] [2021-11-20 22:46:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:45,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:45,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:45,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:46:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 22:46:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 22:46:46,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:46:46,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895512144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:46,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:46:46,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [29] total 31 [2021-11-20 22:46:46,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386437314] [2021-11-20 22:46:46,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:46,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:46:46,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:46:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-11-20 22:46:46,045 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) [2021-11-20 22:46:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:46,214 INFO L93 Difference]: Finished difference Result 878 states and 1379 transitions. [2021-11-20 22:46:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:46:46,215 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 [2021-11-20 22:46:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:46,223 INFO L225 Difference]: With dead ends: 878 [2021-11-20 22:46:46,224 INFO L226 Difference]: Without dead ends: 863 [2021-11-20 22:46:46,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-11-20 22:46:46,226 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 [2021-11-20 22:46:46,227 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] [2021-11-20 22:46:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-20 22:46:46,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 799. [2021-11-20 22:46:46,278 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) [2021-11-20 22:46:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2021-11-20 22:46:46,287 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 105 [2021-11-20 22:46:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:46,288 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2021-11-20 22:46:46,288 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) [2021-11-20 22:46:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2021-11-20 22:46:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 22:46:46,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:46,293 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] [2021-11-20 22:46:46,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:46,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:46,508 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash -205965631, now seen corresponding path program 1 times [2021-11-20 22:46:46,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:46,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514180927] [2021-11-20 22:46:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:46,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 22:46:46,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:46,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514180927] [2021-11-20 22:46:46,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514180927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:46,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087150125] [2021-11-20 22:46:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:46,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:46,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:46,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:46,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7dab5d6-88eb-4b1a-ae1c-26fdb2286a77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:46:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-20 22:46:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 22:46:49,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:47:34,514 WARN L227 SmtUtils]: Spent 41.10s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-20 22:48:15,628 WARN L227 SmtUtils]: Spent 40.53s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-20 22:48:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 22:48:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087150125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:48:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514385019] [2021-11-20 22:48:16,428 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2021-11-20 22:48:16,429 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:16,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:16,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:16,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:49:18,036 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 448 for LOIs [2021-11-20 22:49:19,602 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 586 for LOIs [2021-11-20 22:51:20,086 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 586 for LOIs [2021-11-20 22:55:40,800 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 455 for LOIs [2021-11-20 22:56:09,888 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 499 for LOIs [2021-11-20 22:56:30,771 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2021-11-20 22:56:30,898 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 101 for LOIs [2021-11-20 22:56:31,197 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 593 for LOIs [2021-11-20 22:57:19,091 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 423 for LOIs [2021-11-20 22:57:20,643 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 456 for LOIs [2021-11-20 22:57:40,273 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 452 for LOIs [2021-11-20 22:57:42,406 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 556 for LOIs [2021-11-20 22:58:16,990 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 814 for LOIs [2021-11-20 22:58:49,738 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 660 for LOIs