./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh --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 a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 04:42:33,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:42:33,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:42:33,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:42:33,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:42:33,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:42:33,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:42:33,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:42:33,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:42:33,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:42:33,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:42:33,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:42:33,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:42:33,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:42:33,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:42:33,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:42:33,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:42:33,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:42:33,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:42:33,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:42:33,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:42:33,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:42:33,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:42:33,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:42:33,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:42:33,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:42:33,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:42:33,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:42:33,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:42:33,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:42:33,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:42:33,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:42:33,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:42:33,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:42:33,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:42:33,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:42:33,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:42:33,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:42:33,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:42:33,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:42:33,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:42:33,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:42:33,579 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:42:33,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:42:33,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:42:33,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:42:33,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:42:33,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:42:33,581 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:42:33,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:42:33,582 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:42:33,582 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:42:33,582 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:42:33,582 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:42:33,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:42:33,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:42:33,583 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:42:33,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:42:33,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:42:33,583 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:42:33,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:42:33,584 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:42:33,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:42:33,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:42:33,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:42:33,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:42:33,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:42:33,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:42:33,585 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:42:33,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:42:33,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:42:33,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:42:33,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:42:33,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:42:33,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:42:33,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:42:33,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:42:33,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:42:33,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:42:33,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:42:33,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:42:33,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:42:33,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:42:33,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2022-12-14 04:42:33,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:42:33,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:42:33,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:42:33,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:42:33,797 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:42:33,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-12-14 04:42:36,387 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:42:36,621 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:42:36,622 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2022-12-14 04:42:36,637 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/data/66f895955/2faf1a4d3bce407d90329fe71866b7ee/FLAG227d9b3ca [2022-12-14 04:42:36,651 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/data/66f895955/2faf1a4d3bce407d90329fe71866b7ee [2022-12-14 04:42:36,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:42:36,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:42:36,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:42:36,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:42:36,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:42:36,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:42:36" (1/1) ... [2022-12-14 04:42:36,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23afd62e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:36, skipping insertion in model container [2022-12-14 04:42:36,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:42:36" (1/1) ... [2022-12-14 04:42:36,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:42:36,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:42:36,905 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-12-14 04:42:37,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:42:37,134 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:42:37,162 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2022-12-14 04:42:37,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:42:37,262 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:42:37,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37 WrapperNode [2022-12-14 04:42:37,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:42:37,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:42:37,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:42:37,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:42:37,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,318 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 905 [2022-12-14 04:42:37,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:42:37,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:42:37,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:42:37,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:42:37,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:42:37,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:42:37,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:42:37,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:42:37,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (1/1) ... [2022-12-14 04:42:37,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:42:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:37,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:42:37,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:42:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:42:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 04:42:37,447 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 04:42:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 04:42:37,447 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 04:42:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 04:42:37,447 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 04:42:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 04:42:37,448 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 04:42:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 04:42:37,448 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 04:42:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 04:42:37,448 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 04:42:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 04:42:37,448 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 04:42:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 04:42:37,448 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 04:42:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 04:42:37,449 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 04:42:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 04:42:37,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 04:42:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 04:42:37,449 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 04:42:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 04:42:37,449 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 04:42:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 04:42:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 04:42:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 04:42:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 04:42:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 04:42:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 04:42:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 04:42:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 04:42:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 04:42:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 04:42:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 04:42:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 04:42:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 04:42:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 04:42:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:42:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 04:42:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 04:42:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 04:42:37,452 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 04:42:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 04:42:37,452 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 04:42:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 04:42:37,452 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 04:42:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:42:37,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:42:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 04:42:37,453 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 04:42:37,568 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:42:37,570 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:42:38,354 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:42:38,912 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:42:38,912 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 04:42:38,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:42:38 BoogieIcfgContainer [2022-12-14 04:42:38,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:42:38,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:42:38,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:42:38,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:42:38,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:42:36" (1/3) ... [2022-12-14 04:42:38,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59659bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:42:38, skipping insertion in model container [2022-12-14 04:42:38,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:37" (2/3) ... [2022-12-14 04:42:38,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59659bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:42:38, skipping insertion in model container [2022-12-14 04:42:38,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:42:38" (3/3) ... [2022-12-14 04:42:38,920 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2022-12-14 04:42:38,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:42:38,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:42:38,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:42:38,985 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@19e4df0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:42:38,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:42:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-12-14 04:42:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 04:42:39,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:39,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:39,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:39,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:39,010 INFO L85 PathProgramCache]: Analyzing trace with hash -279828453, now seen corresponding path program 1 times [2022-12-14 04:42:39,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980136481] [2022-12-14 04:42:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:39,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:39,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980136481] [2022-12-14 04:42:39,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980136481] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:39,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:39,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:42:39,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947737197] [2022-12-14 04:42:39,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:39,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:42:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:42:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:39,498 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 04:42:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:39,921 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2022-12-14 04:42:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:42:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-12-14 04:42:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:39,934 INFO L225 Difference]: With dead ends: 844 [2022-12-14 04:42:39,934 INFO L226 Difference]: Without dead ends: 483 [2022-12-14 04:42:39,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:39,941 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 282 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:39,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2315 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:42:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-12-14 04:42:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2022-12-14 04:42:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-14 04:42:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2022-12-14 04:42:40,015 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2022-12-14 04:42:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2022-12-14 04:42:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 04:42:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2022-12-14 04:42:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 04:42:40,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:40,022 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:42:40,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1872925316, now seen corresponding path program 1 times [2022-12-14 04:42:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:40,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946330058] [2022-12-14 04:42:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:42:40,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946330058] [2022-12-14 04:42:40,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946330058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:40,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:40,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 04:42:40,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116724264] [2022-12-14 04:42:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:40,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 04:42:40,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:40,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 04:42:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 04:42:40,401 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 04:42:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:42,628 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2022-12-14 04:42:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 04:42:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2022-12-14 04:42:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:42,634 INFO L225 Difference]: With dead ends: 1280 [2022-12-14 04:42:42,634 INFO L226 Difference]: Without dead ends: 923 [2022-12-14 04:42:42,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 04:42:42,637 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1733 mSDsluCounter, 2128 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 4504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:42,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 2525 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 3918 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 04:42:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-12-14 04:42:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2022-12-14 04:42:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2022-12-14 04:42:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2022-12-14 04:42:42,709 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2022-12-14 04:42:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:42,710 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2022-12-14 04:42:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 04:42:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2022-12-14 04:42:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 04:42:42,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:42,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:42,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:42:42,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1774988764, now seen corresponding path program 1 times [2022-12-14 04:42:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:42,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332026305] [2022-12-14 04:42:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:42:42,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:42,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332026305] [2022-12-14 04:42:42,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332026305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:42,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:42,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:42:42,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546929621] [2022-12-14 04:42:42,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:42,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:42:42,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:42:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:42,904 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 04:42:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:43,119 INFO L93 Difference]: Finished difference Result 1470 states and 2365 transitions. [2022-12-14 04:42:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:42:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-12-14 04:42:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:43,126 INFO L225 Difference]: With dead ends: 1470 [2022-12-14 04:42:43,126 INFO L226 Difference]: Without dead ends: 956 [2022-12-14 04:42:43,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:43,129 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 41 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:43,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3503 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-12-14 04:42:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 888. [2022-12-14 04:42:43,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 626 states have (on average 1.5830670926517572) internal successors, (991), 657 states have internal predecessors, (991), 203 states have call successors, (203), 48 states have call predecessors, (203), 58 states have return successors, (225), 207 states have call predecessors, (225), 198 states have call successors, (225) [2022-12-14 04:42:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1419 transitions. [2022-12-14 04:42:43,170 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1419 transitions. Word has length 72 [2022-12-14 04:42:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:43,170 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1419 transitions. [2022-12-14 04:42:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 04:42:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1419 transitions. [2022-12-14 04:42:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 04:42:43,172 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:43,172 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:43,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:42:43,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:43,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1283850312, now seen corresponding path program 1 times [2022-12-14 04:42:43,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:43,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624026651] [2022-12-14 04:42:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:43,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:42:43,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624026651] [2022-12-14 04:42:43,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624026651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:43,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:43,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:42:43,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832068102] [2022-12-14 04:42:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:42:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:42:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:43,317 INFO L87 Difference]: Start difference. First operand 888 states and 1419 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 04:42:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:43,509 INFO L93 Difference]: Finished difference Result 1499 states and 2403 transitions. [2022-12-14 04:42:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:42:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-12-14 04:42:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:43,514 INFO L225 Difference]: With dead ends: 1499 [2022-12-14 04:42:43,514 INFO L226 Difference]: Without dead ends: 971 [2022-12-14 04:42:43,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:43,517 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 42 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3484 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:43,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3484 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-12-14 04:42:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 891. [2022-12-14 04:42:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 657 states have internal predecessors, (994), 203 states have call successors, (203), 48 states have call predecessors, (203), 58 states have return successors, (225), 210 states have call predecessors, (225), 198 states have call successors, (225) [2022-12-14 04:42:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1422 transitions. [2022-12-14 04:42:43,551 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1422 transitions. Word has length 73 [2022-12-14 04:42:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:43,552 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1422 transitions. [2022-12-14 04:42:43,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 04:42:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1422 transitions. [2022-12-14 04:42:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 04:42:43,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:43,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:43,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 04:42:43,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:43,554 INFO L85 PathProgramCache]: Analyzing trace with hash -839175576, now seen corresponding path program 1 times [2022-12-14 04:42:43,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413131561] [2022-12-14 04:42:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:43,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:42:44,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:44,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413131561] [2022-12-14 04:42:44,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413131561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:44,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:44,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:42:44,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839235202] [2022-12-14 04:42:44,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:44,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:42:44,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:44,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:42:44,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:44,139 INFO L87 Difference]: Start difference. First operand 891 states and 1422 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 04:42:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:47,121 INFO L93 Difference]: Finished difference Result 3870 states and 6302 transitions. [2022-12-14 04:42:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 04:42:47,122 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), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2022-12-14 04:42:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:47,133 INFO L225 Difference]: With dead ends: 3870 [2022-12-14 04:42:47,133 INFO L226 Difference]: Without dead ends: 2996 [2022-12-14 04:42:47,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:42:47,137 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2205 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3429 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 3429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:47,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 2000 Invalid, 4376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 3429 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 04:42:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2022-12-14 04:42:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2724. [2022-12-14 04:42:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 1916 states have (on average 1.5751565762004176) internal successors, (3018), 2020 states have internal predecessors, (3018), 645 states have call successors, (645), 128 states have call predecessors, (645), 162 states have return successors, (735), 646 states have call predecessors, (735), 640 states have call successors, (735) [2022-12-14 04:42:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4398 transitions. [2022-12-14 04:42:47,306 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4398 transitions. Word has length 73 [2022-12-14 04:42:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:47,307 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 4398 transitions. [2022-12-14 04:42:47,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 04:42:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4398 transitions. [2022-12-14 04:42:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 04:42:47,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:47,309 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:47,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:42:47,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:47,309 INFO L85 PathProgramCache]: Analyzing trace with hash 14895455, now seen corresponding path program 1 times [2022-12-14 04:42:47,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644285501] [2022-12-14 04:42:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:42:47,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:47,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644285501] [2022-12-14 04:42:47,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644285501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:47,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:47,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 04:42:47,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004528015] [2022-12-14 04:42:47,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:47,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:42:47,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:42:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:42:47,492 INFO L87 Difference]: Start difference. First operand 2724 states and 4398 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:42:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:49,096 INFO L93 Difference]: Finished difference Result 6160 states and 9996 transitions. [2022-12-14 04:42:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:42:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-12-14 04:42:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:49,110 INFO L225 Difference]: With dead ends: 6160 [2022-12-14 04:42:49,110 INFO L226 Difference]: Without dead ends: 4149 [2022-12-14 04:42:49,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 04:42:49,117 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 1638 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 2760 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 2760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:49,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1803 Valid, 1552 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 2760 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 04:42:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2022-12-14 04:42:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3973. [2022-12-14 04:42:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 2745 states have (on average 1.5340619307832422) internal successors, (4211), 2908 states have internal predecessors, (4211), 970 states have call successors, (970), 210 states have call predecessors, (970), 257 states have return successors, (1129), 960 states have call predecessors, (1129), 965 states have call successors, (1129) [2022-12-14 04:42:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 6310 transitions. [2022-12-14 04:42:49,433 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 6310 transitions. Word has length 80 [2022-12-14 04:42:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:49,433 INFO L495 AbstractCegarLoop]: Abstraction has 3973 states and 6310 transitions. [2022-12-14 04:42:49,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:42:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 6310 transitions. [2022-12-14 04:42:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 04:42:49,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:49,435 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:49,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 04:42:49,435 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:49,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1083163466, now seen corresponding path program 1 times [2022-12-14 04:42:49,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:49,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532830918] [2022-12-14 04:42:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:49,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:42:49,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:49,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532830918] [2022-12-14 04:42:49,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532830918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:49,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:49,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:42:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114583487] [2022-12-14 04:42:49,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:49,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:42:49,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:49,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:42:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:49,586 INFO L87 Difference]: Start difference. First operand 3973 states and 6310 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 04:42:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:51,034 INFO L93 Difference]: Finished difference Result 7514 states and 11987 transitions. [2022-12-14 04:42:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 04:42:51,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-12-14 04:42:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:51,052 INFO L225 Difference]: With dead ends: 7514 [2022-12-14 04:42:51,052 INFO L226 Difference]: Without dead ends: 4479 [2022-12-14 04:42:51,059 INFO L412 NwaCegarLoop]: 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 [2022-12-14 04:42:51,060 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 991 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:51,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1610 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 04:42:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4479 states. [2022-12-14 04:42:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4479 to 4054. [2022-12-14 04:42:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4054 states, 2799 states have (on average 1.528045730618078) internal successors, (4277), 2974 states have internal predecessors, (4277), 973 states have call successors, (973), 225 states have call predecessors, (973), 281 states have return successors, (1163), 960 states have call predecessors, (1163), 968 states have call successors, (1163) [2022-12-14 04:42:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 6413 transitions. [2022-12-14 04:42:51,360 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 6413 transitions. Word has length 82 [2022-12-14 04:42:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:51,361 INFO L495 AbstractCegarLoop]: Abstraction has 4054 states and 6413 transitions. [2022-12-14 04:42:51,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 04:42:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 6413 transitions. [2022-12-14 04:42:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 04:42:51,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:51,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 04:42:51,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1803735509, now seen corresponding path program 1 times [2022-12-14 04:42:51,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:51,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590473342] [2022-12-14 04:42:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:51,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:42:51,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590473342] [2022-12-14 04:42:51,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590473342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:51,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:51,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 04:42:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979970667] [2022-12-14 04:42:51,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:51,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:42:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:42:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:42:51,505 INFO L87 Difference]: Start difference. First operand 4054 states and 6413 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 04:42:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:52,065 INFO L93 Difference]: Finished difference Result 4158 states and 6575 transitions. [2022-12-14 04:42:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:42:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-12-14 04:42:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:52,081 INFO L225 Difference]: With dead ends: 4158 [2022-12-14 04:42:52,081 INFO L226 Difference]: Without dead ends: 4143 [2022-12-14 04:42:52,083 INFO L412 NwaCegarLoop]: 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 [2022-12-14 04:42:52,084 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 676 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:52,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1450 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:42:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-12-14 04:42:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4060. [2022-12-14 04:42:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2805 states have (on average 1.526916221033868) internal successors, (4283), 2980 states have internal predecessors, (4283), 973 states have call successors, (973), 225 states have call predecessors, (973), 281 states have return successors, (1163), 960 states have call predecessors, (1163), 968 states have call successors, (1163) [2022-12-14 04:42:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6419 transitions. [2022-12-14 04:42:52,355 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6419 transitions. Word has length 85 [2022-12-14 04:42:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:52,355 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 6419 transitions. [2022-12-14 04:42:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 04:42:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6419 transitions. [2022-12-14 04:42:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 04:42:52,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:52,357 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 04:42:52,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 04:42:52,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1633654335, now seen corresponding path program 1 times [2022-12-14 04:42:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:52,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263179902] [2022-12-14 04:42:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:42:53,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263179902] [2022-12-14 04:42:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263179902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985027237] [2022-12-14 04:42:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:53,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:53,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:53,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:42:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:53,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 04:42:53,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:42:53,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:53,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985027237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:53,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:42:53,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-12-14 04:42:53,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943046706] [2022-12-14 04:42:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:53,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:42:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:42:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-12-14 04:42:53,333 INFO L87 Difference]: Start difference. First operand 4060 states and 6419 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 04:42:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:53,668 INFO L93 Difference]: Finished difference Result 4081 states and 6446 transitions. [2022-12-14 04:42:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:42:53,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 91 [2022-12-14 04:42:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:53,683 INFO L225 Difference]: With dead ends: 4081 [2022-12-14 04:42:53,683 INFO L226 Difference]: Without dead ends: 4066 [2022-12-14 04:42:53,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:42:53,686 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 30 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:53,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2158 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2022-12-14 04:42:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 4060. [2022-12-14 04:42:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2805 states have (on average 1.5240641711229947) internal successors, (4275), 2980 states have internal predecessors, (4275), 973 states have call successors, (973), 225 states have call predecessors, (973), 281 states have return successors, (1163), 960 states have call predecessors, (1163), 968 states have call successors, (1163) [2022-12-14 04:42:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6411 transitions. [2022-12-14 04:42:53,938 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6411 transitions. Word has length 91 [2022-12-14 04:42:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:53,938 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 6411 transitions. [2022-12-14 04:42:53,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 04:42:53,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6411 transitions. [2022-12-14 04:42:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 04:42:53,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:53,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:53,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:42:54,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 04:42:54,143 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash 655355337, now seen corresponding path program 1 times [2022-12-14 04:42:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701616488] [2022-12-14 04:42:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:54,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:42:55,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701616488] [2022-12-14 04:42:55,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701616488] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125642912] [2022-12-14 04:42:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:55,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:55,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:55,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:42:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:55,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:42:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:42:56,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:56,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125642912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:56,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:42:56,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [24] total 29 [2022-12-14 04:42:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088939116] [2022-12-14 04:42:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:56,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:42:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:42:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:42:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2022-12-14 04:42:56,052 INFO L87 Difference]: Start difference. First operand 4060 states and 6411 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 04:42:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:57,600 INFO L93 Difference]: Finished difference Result 9383 states and 14782 transitions. [2022-12-14 04:42:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:42:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2022-12-14 04:42:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:57,622 INFO L225 Difference]: With dead ends: 9383 [2022-12-14 04:42:57,623 INFO L226 Difference]: Without dead ends: 5339 [2022-12-14 04:42:57,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2022-12-14 04:42:57,632 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 741 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 2086 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 2086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:57,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1861 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 2086 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 04:42:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2022-12-14 04:42:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 5288. [2022-12-14 04:42:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 3683 states have (on average 1.5172413793103448) internal successors, (5588), 3886 states have internal predecessors, (5588), 1235 states have call successors, (1235), 298 states have call predecessors, (1235), 369 states have return successors, (1478), 1210 states have call predecessors, (1478), 1230 states have call successors, (1478) [2022-12-14 04:42:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 8301 transitions. [2022-12-14 04:42:57,969 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 8301 transitions. Word has length 98 [2022-12-14 04:42:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:57,969 INFO L495 AbstractCegarLoop]: Abstraction has 5288 states and 8301 transitions. [2022-12-14 04:42:57,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 04:42:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 8301 transitions. [2022-12-14 04:42:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 04:42:57,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:57,972 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:57,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:42:58,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:58,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:42:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1273943314, now seen corresponding path program 1 times [2022-12-14 04:42:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:42:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085103329] [2022-12-14 04:42:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:42:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:42:58,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:42:58,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085103329] [2022-12-14 04:42:58,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085103329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092109552] [2022-12-14 04:42:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:58,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:58,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:58,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:58,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:42:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:42:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:00,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:43:01,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092109552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049042471] [2022-12-14 04:43:01,771 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2022-12-14 04:43:01,772 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:43:01,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:43:01,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:43:01,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:43:05,721 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 04:44:12,610 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-12-14 04:44:18,831 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 114 for LOIs [2022-12-14 04:44:19,342 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 04:44:19,359 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 128 for LOIs [2022-12-14 04:44:19,872 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 35 for LOIs [2022-12-14 04:44:19,880 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 82 for LOIs [2022-12-14 04:44:19,886 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 04:44:23,010 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 04:44:23,600 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-12-14 04:44:23,851 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 107 for LOIs [2022-12-14 04:44:24,151 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 105 for LOIs [2022-12-14 04:44:24,163 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 04:44:24,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:45:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2049042471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:58,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:45:58,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [11, 12, 12] total 94 [2022-12-14 04:45:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786779768] [2022-12-14 04:45:58,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 04:45:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 04:45:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=8046, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 04:45:58,962 INFO L87 Difference]: Start difference. First operand 5288 states and 8301 transitions. Second operand has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 04:48:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:03,929 INFO L93 Difference]: Finished difference Result 11398 states and 17866 transitions. [2022-12-14 04:48:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 04:48:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 99 [2022-12-14 04:48:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:03,950 INFO L225 Difference]: With dead ends: 11398 [2022-12-14 04:48:03,951 INFO L226 Difference]: Without dead ends: 6110 [2022-12-14 04:48:03,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 182.3s TimeCoverageRelationStatistics Valid=1093, Invalid=13913, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 04:48:03,978 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 862 mSDsluCounter, 7185 mSDsCounter, 0 mSdLazyCounter, 15335 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 7719 SdHoareTripleChecker+Invalid, 15549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 15335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:03,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 7719 Invalid, 15549 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [214 Valid, 15335 Invalid, 0 Unknown, 0 Unchecked, 36.7s Time] [2022-12-14 04:48:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2022-12-14 04:48:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5875. [2022-12-14 04:48:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5875 states, 4135 states have (on average 1.5071342200725515) internal successors, (6232), 4339 states have internal predecessors, (6232), 1324 states have call successors, (1324), 335 states have call predecessors, (1324), 415 states have return successors, (1592), 1307 states have call predecessors, (1592), 1319 states have call successors, (1592) [2022-12-14 04:48:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5875 states to 5875 states and 9148 transitions. [2022-12-14 04:48:04,649 INFO L78 Accepts]: Start accepts. Automaton has 5875 states and 9148 transitions. Word has length 99 [2022-12-14 04:48:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:04,650 INFO L495 AbstractCegarLoop]: Abstraction has 5875 states and 9148 transitions. [2022-12-14 04:48:04,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 04:48:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5875 states and 9148 transitions. [2022-12-14 04:48:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 04:48:04,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:04,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:04,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 04:48:04,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 04:48:04,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash -618252713, now seen corresponding path program 1 times [2022-12-14 04:48:04,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:04,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651423687] [2022-12-14 04:48:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:04,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:48:04,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651423687] [2022-12-14 04:48:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651423687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:04,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:48:04,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:48:04,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721498677] [2022-12-14 04:48:04,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:04,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:48:04,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:48:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:48:04,970 INFO L87 Difference]: Start difference. First operand 5875 states and 9148 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:48:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:05,805 INFO L93 Difference]: Finished difference Result 10573 states and 16613 transitions. [2022-12-14 04:48:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:48:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2022-12-14 04:48:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:05,825 INFO L225 Difference]: With dead ends: 10573 [2022-12-14 04:48:05,825 INFO L226 Difference]: Without dead ends: 6500 [2022-12-14 04:48:05,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:48:05,837 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 37 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3482 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:05,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3482 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:48:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2022-12-14 04:48:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 6069. [2022-12-14 04:48:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 4273 states have (on average 1.497308682424526) internal successors, (6398), 4488 states have internal predecessors, (6398), 1336 states have call successors, (1336), 335 states have call predecessors, (1336), 459 states have return successors, (1679), 1352 states have call predecessors, (1679), 1331 states have call successors, (1679) [2022-12-14 04:48:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 9413 transitions. [2022-12-14 04:48:06,544 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 9413 transitions. Word has length 108 [2022-12-14 04:48:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:06,544 INFO L495 AbstractCegarLoop]: Abstraction has 6069 states and 9413 transitions. [2022-12-14 04:48:06,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:48:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 9413 transitions. [2022-12-14 04:48:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 04:48:06,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:06,546 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 04:48:06,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 04:48:06,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1186708623, now seen corresponding path program 1 times [2022-12-14 04:48:06,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:06,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758369102] [2022-12-14 04:48:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:06,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 04:48:06,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758369102] [2022-12-14 04:48:06,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758369102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:06,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:48:06,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 04:48:06,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954110028] [2022-12-14 04:48:06,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 04:48:06,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 04:48:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:48:06,672 INFO L87 Difference]: Start difference. First operand 6069 states and 9413 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:48:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:07,685 INFO L93 Difference]: Finished difference Result 10786 states and 16882 transitions. [2022-12-14 04:48:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:48:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 109 [2022-12-14 04:48:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:07,702 INFO L225 Difference]: With dead ends: 10786 [2022-12-14 04:48:07,702 INFO L226 Difference]: Without dead ends: 6559 [2022-12-14 04:48:07,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:48:07,710 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 36 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:07,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3507 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:48:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2022-12-14 04:48:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 6080. [2022-12-14 04:48:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4297 states have (on average 1.5003490807540145) internal successors, (6447), 4481 states have internal predecessors, (6447), 1345 states have call successors, (1345), 332 states have call predecessors, (1345), 437 states have return successors, (1650), 1373 states have call predecessors, (1650), 1340 states have call successors, (1650) [2022-12-14 04:48:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 9442 transitions. [2022-12-14 04:48:08,378 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 9442 transitions. Word has length 109 [2022-12-14 04:48:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:08,378 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 9442 transitions. [2022-12-14 04:48:08,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 04:48:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 9442 transitions. [2022-12-14 04:48:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 04:48:08,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:08,380 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:08,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 04:48:08,381 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:08,381 INFO L85 PathProgramCache]: Analyzing trace with hash -810964891, now seen corresponding path program 1 times [2022-12-14 04:48:08,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:08,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583202545] [2022-12-14 04:48:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:48:08,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583202545] [2022-12-14 04:48:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583202545] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819532617] [2022-12-14 04:48:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:08,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:08,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:08,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:48:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:08,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:48:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:48:09,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 04:48:09,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819532617] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810126466] [2022-12-14 04:48:09,841 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2022-12-14 04:48:09,841 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:09,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:09,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:09,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:12,692 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 04:48:13,537 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-12-14 04:48:17,374 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 113 for LOIs [2022-12-14 04:48:18,066 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 04:48:18,083 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 111 for LOIs [2022-12-14 04:48:18,494 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 101 for LOIs [2022-12-14 04:48:18,501 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 533 for LOIs [2022-12-14 04:48:18,724 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 04:48:21,854 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 04:48:22,414 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 87 for LOIs [2022-12-14 04:48:22,423 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 04:48:22,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:49:18,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1810126466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:49:18,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:49:18,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [13, 12, 12] total 74 [2022-12-14 04:49:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690293346] [2022-12-14 04:49:18,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:49:18,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 04:49:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:49:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 04:49:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=4938, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 04:49:18,144 INFO L87 Difference]: Start difference. First operand 6080 states and 9442 transitions. Second operand has 47 states, 34 states have (on average 2.088235294117647) internal successors, (71), 29 states have internal predecessors, (71), 14 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 11 states have call predecessors, (19), 14 states have call successors, (19) [2022-12-14 04:49:32,981 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 661 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:50:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:42,751 INFO L93 Difference]: Finished difference Result 10490 states and 16367 transitions. [2022-12-14 04:50:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 04:50:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 34 states have (on average 2.088235294117647) internal successors, (71), 29 states have internal predecessors, (71), 14 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 11 states have call predecessors, (19), 14 states have call successors, (19) Word has length 122 [2022-12-14 04:50:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:42,769 INFO L225 Difference]: With dead ends: 10490 [2022-12-14 04:50:42,769 INFO L226 Difference]: Without dead ends: 6065 [2022-12-14 04:50:42,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 296 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 107.4s TimeCoverageRelationStatistics Valid=636, Invalid=7020, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 04:50:42,780 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 138 mSDsluCounter, 7444 mSDsCounter, 0 mSdLazyCounter, 11521 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 7922 SdHoareTripleChecker+Invalid, 11554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 11521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:42,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 7922 Invalid, 11554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 11521 Invalid, 0 Unknown, 0 Unchecked, 32.2s Time] [2022-12-14 04:50:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2022-12-14 04:50:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5998. [2022-12-14 04:50:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 4235 states have (on average 1.5036599763872491) internal successors, (6368), 4420 states have internal predecessors, (6368), 1333 states have call successors, (1333), 328 states have call predecessors, (1333), 429 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-12-14 04:50:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 9333 transitions. [2022-12-14 04:50:43,519 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 9333 transitions. Word has length 122 [2022-12-14 04:50:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:43,519 INFO L495 AbstractCegarLoop]: Abstraction has 5998 states and 9333 transitions. [2022-12-14 04:50:43,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 34 states have (on average 2.088235294117647) internal successors, (71), 29 states have internal predecessors, (71), 14 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 11 states have call predecessors, (19), 14 states have call successors, (19) [2022-12-14 04:50:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 9333 transitions. [2022-12-14 04:50:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 04:50:43,521 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:43,521 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:43,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 04:50:43,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 04:50:43,722 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1016461249, now seen corresponding path program 1 times [2022-12-14 04:50:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:43,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099792400] [2022-12-14 04:50:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 04:50:43,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:43,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099792400] [2022-12-14 04:50:43,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099792400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:43,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335744644] [2022-12-14 04:50:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:43,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:43,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:43,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:50:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:50:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 04:50:44,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:50:44,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335744644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:44,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:50:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-12-14 04:50:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396639958] [2022-12-14 04:50:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:44,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 04:50:44,082 INFO L87 Difference]: Start difference. First operand 5998 states and 9333 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:45,036 INFO L93 Difference]: Finished difference Result 11923 states and 18866 transitions. [2022-12-14 04:50:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:50:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 118 [2022-12-14 04:50:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:45,057 INFO L225 Difference]: With dead ends: 11923 [2022-12-14 04:50:45,057 INFO L226 Difference]: Without dead ends: 6466 [2022-12-14 04:50:45,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:50:45,071 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 213 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:45,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1416 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:50:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6466 states. [2022-12-14 04:50:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6466 to 6466. [2022-12-14 04:50:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6466 states, 4691 states have (on average 1.5442336388829674) internal successors, (7244), 4876 states have internal predecessors, (7244), 1333 states have call successors, (1333), 340 states have call predecessors, (1333), 441 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-12-14 04:50:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6466 states to 6466 states and 10209 transitions. [2022-12-14 04:50:45,742 INFO L78 Accepts]: Start accepts. Automaton has 6466 states and 10209 transitions. Word has length 118 [2022-12-14 04:50:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:45,742 INFO L495 AbstractCegarLoop]: Abstraction has 6466 states and 10209 transitions. [2022-12-14 04:50:45,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6466 states and 10209 transitions. [2022-12-14 04:50:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 04:50:45,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:45,744 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-12-14 04:50:45,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:50:45,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:45,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1344206757, now seen corresponding path program 1 times [2022-12-14 04:50:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:45,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468704214] [2022-12-14 04:50:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:45,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 04:50:46,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468704214] [2022-12-14 04:50:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468704214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814412925] [2022-12-14 04:50:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:46,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:46,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:46,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:46,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:50:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:50:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 04:50:46,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:50:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814412925] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:46,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:50:46,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 04:50:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429548428] [2022-12-14 04:50:46,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:46,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:46,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:50:46,335 INFO L87 Difference]: Start difference. First operand 6466 states and 10209 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:47,261 INFO L93 Difference]: Finished difference Result 12859 states and 20603 transitions. [2022-12-14 04:50:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:50:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 123 [2022-12-14 04:50:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:47,280 INFO L225 Difference]: With dead ends: 12859 [2022-12-14 04:50:47,280 INFO L226 Difference]: Without dead ends: 6934 [2022-12-14 04:50:47,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:50:47,293 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 211 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:47,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1416 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:50:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2022-12-14 04:50:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6934. [2022-12-14 04:50:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6934 states, 5147 states have (on average 1.577618029920342) internal successors, (8120), 5332 states have internal predecessors, (8120), 1333 states have call successors, (1333), 352 states have call predecessors, (1333), 453 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-12-14 04:50:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6934 states to 6934 states and 11085 transitions. [2022-12-14 04:50:48,066 INFO L78 Accepts]: Start accepts. Automaton has 6934 states and 11085 transitions. Word has length 123 [2022-12-14 04:50:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:48,067 INFO L495 AbstractCegarLoop]: Abstraction has 6934 states and 11085 transitions. [2022-12-14 04:50:48,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6934 states and 11085 transitions. [2022-12-14 04:50:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 04:50:48,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:48,069 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:48,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 04:50:48,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 04:50:48,270 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1051059467, now seen corresponding path program 1 times [2022-12-14 04:50:48,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:48,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368211994] [2022-12-14 04:50:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:48,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 04:50:48,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368211994] [2022-12-14 04:50:48,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368211994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345446098] [2022-12-14 04:50:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:48,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:48,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:48,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:50:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:50:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 04:50:48,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:50:48,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345446098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:48,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:50:48,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 04:50:48,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335945495] [2022-12-14 04:50:48,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:48,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:50:48,537 INFO L87 Difference]: Start difference. First operand 6934 states and 11085 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:49,364 INFO L93 Difference]: Finished difference Result 13795 states and 22340 transitions. [2022-12-14 04:50:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:50:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2022-12-14 04:50:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:49,383 INFO L225 Difference]: With dead ends: 13795 [2022-12-14 04:50:49,383 INFO L226 Difference]: Without dead ends: 7402 [2022-12-14 04:50:49,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:50:49,396 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 209 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:49,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1416 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:50:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2022-12-14 04:50:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 7402. [2022-12-14 04:50:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 5603 states have (on average 1.605568445475638) internal successors, (8996), 5788 states have internal predecessors, (8996), 1333 states have call successors, (1333), 364 states have call predecessors, (1333), 465 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-12-14 04:50:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 11961 transitions. [2022-12-14 04:50:50,081 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 11961 transitions. Word has length 127 [2022-12-14 04:50:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:50,082 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 11961 transitions. [2022-12-14 04:50:50,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 11961 transitions. [2022-12-14 04:50:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 04:50:50,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:50,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:50,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:50:50,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 04:50:50,286 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:50,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 161811615, now seen corresponding path program 1 times [2022-12-14 04:50:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512968484] [2022-12-14 04:50:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 04:50:50,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512968484] [2022-12-14 04:50:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512968484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300299946] [2022-12-14 04:50:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:50,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:50,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:50,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:50,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 04:50:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:50,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:50:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 04:50:50,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:50:50,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300299946] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:50,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:50:50,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 04:50:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009691938] [2022-12-14 04:50:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:50:50,554 INFO L87 Difference]: Start difference. First operand 7402 states and 11961 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:51,380 INFO L93 Difference]: Finished difference Result 14731 states and 24077 transitions. [2022-12-14 04:50:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:50:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2022-12-14 04:50:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:51,399 INFO L225 Difference]: With dead ends: 14731 [2022-12-14 04:50:51,399 INFO L226 Difference]: Without dead ends: 7870 [2022-12-14 04:50:51,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:50:51,413 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 207 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:51,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1416 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:50:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7870 states. [2022-12-14 04:50:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7870 to 7870. [2022-12-14 04:50:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7870 states, 6059 states have (on average 1.6293117676184188) internal successors, (9872), 6244 states have internal predecessors, (9872), 1333 states have call successors, (1333), 376 states have call predecessors, (1333), 477 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-12-14 04:50:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7870 states to 7870 states and 12837 transitions. [2022-12-14 04:50:52,103 INFO L78 Accepts]: Start accepts. Automaton has 7870 states and 12837 transitions. Word has length 130 [2022-12-14 04:50:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:52,103 INFO L495 AbstractCegarLoop]: Abstraction has 7870 states and 12837 transitions. [2022-12-14 04:50:52,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 04:50:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7870 states and 12837 transitions. [2022-12-14 04:50:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 04:50:52,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:52,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:52,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 04:50:52,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 04:50:52,308 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash -710521459, now seen corresponding path program 1 times [2022-12-14 04:50:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:52,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627918676] [2022-12-14 04:50:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 04:50:52,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627918676] [2022-12-14 04:50:52,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627918676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645269657] [2022-12-14 04:50:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:52,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:52,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:52,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:52,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:50:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 04:50:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 04:50:52,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:50:52,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645269657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:50:52,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:50:52,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 04:50:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584677488] [2022-12-14 04:50:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:50:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:50:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:50:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:50:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:50:52,655 INFO L87 Difference]: Start difference. First operand 7870 states and 12837 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2022-12-14 04:50:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:50:53,863 INFO L93 Difference]: Finished difference Result 8041 states and 13127 transitions. [2022-12-14 04:50:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:50:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 132 [2022-12-14 04:50:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:50:53,883 INFO L225 Difference]: With dead ends: 8041 [2022-12-14 04:50:53,883 INFO L226 Difference]: Without dead ends: 8026 [2022-12-14 04:50:53,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:50:53,889 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 44 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:50:53,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1695 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:50:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2022-12-14 04:50:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7892. [2022-12-14 04:50:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7892 states, 6081 states have (on average 1.6268705804966288) internal successors, (9893), 6266 states have internal predecessors, (9893), 1333 states have call successors, (1333), 376 states have call predecessors, (1333), 477 states have return successors, (1632), 1356 states have call predecessors, (1632), 1328 states have call successors, (1632) [2022-12-14 04:50:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7892 states to 7892 states and 12858 transitions. [2022-12-14 04:50:54,623 INFO L78 Accepts]: Start accepts. Automaton has 7892 states and 12858 transitions. Word has length 132 [2022-12-14 04:50:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:50:54,623 INFO L495 AbstractCegarLoop]: Abstraction has 7892 states and 12858 transitions. [2022-12-14 04:50:54,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2022-12-14 04:50:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7892 states and 12858 transitions. [2022-12-14 04:50:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 04:50:54,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:50:54,626 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:50:54,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 04:50:54,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:54,827 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:50:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:50:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash 44042427, now seen corresponding path program 1 times [2022-12-14 04:50:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:50:54,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984905848] [2022-12-14 04:50:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:54,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:50:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:50:55,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:50:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984905848] [2022-12-14 04:50:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984905848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:50:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603532912] [2022-12-14 04:50:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:50:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:55,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:55,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 04:50:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:50:55,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:50:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 04:50:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:50:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 04:50:55,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603532912] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:50:55,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201674350] [2022-12-14 04:50:55,913 INFO L159 IcfgInterpreter]: Started Sifa with 106 locations of interest [2022-12-14 04:50:55,913 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:50:55,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:50:55,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:50:55,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:51:00,789 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 410 for LOIs [2022-12-14 04:51:00,843 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 04:51:16,745 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 709 for LOIs [2022-12-14 04:51:21,730 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 35 for LOIs [2022-12-14 04:51:22,240 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 26 for LOIs [2022-12-14 04:51:22,247 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 93 for LOIs [2022-12-14 04:51:22,884 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 53 for LOIs [2022-12-14 04:51:22,895 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-12-14 04:51:22,896 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 04:51:26,055 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 04:51:26,602 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 24 for LOIs [2022-12-14 04:51:26,604 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 29 for LOIs [2022-12-14 04:51:26,647 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 58 for LOIs [2022-12-14 04:51:26,651 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 04:51:26,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:52:34,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '320377#(and (= 30 (select |#length| 34)) (= (select (select |#memory_int| 23) 0) 32) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= 30 (select |#length| 25)) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#length| 35) 9) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select |#length| 32) 9) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (not (= 0 ~floorButtons_spc2_0~0)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 36) 25) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 33) 25) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 21 (select |#length| 30)) (= 112 (select (select |#memory_int| 18) 3)) (= (select |#length| 27) 21) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 9 (select |#length| 29)) (= 32 (select (select |#memory_int| 7) 3)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= 30 (select |#length| 28)) (= (select (select |#memory_int| 5) 2) 93) (= (select (select |#memory_int| 14) 0) 32) (= 30 (select |#length| 31)) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 9 (select |#length| 26)) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-12-14 04:52:34,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:52:34,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:52:34,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-14 04:52:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075866329] [2022-12-14 04:52:34,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:52:34,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:52:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:52:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:52:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=10583, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 04:52:34,593 INFO L87 Difference]: Start difference. First operand 7892 states and 12858 transitions. Second operand has 21 states, 18 states have (on average 9.11111111111111) internal successors, (164), 18 states have internal predecessors, (164), 11 states have call successors, (45), 7 states have call predecessors, (45), 11 states have return successors, (46), 15 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 04:52:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:52:41,414 INFO L93 Difference]: Finished difference Result 23730 states and 39772 transitions. [2022-12-14 04:52:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 04:52:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 9.11111111111111) internal successors, (164), 18 states have internal predecessors, (164), 11 states have call successors, (45), 7 states have call predecessors, (45), 11 states have return successors, (46), 15 states have call predecessors, (46), 10 states have call successors, (46) Word has length 157 [2022-12-14 04:52:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:52:41,458 INFO L225 Difference]: With dead ends: 23730 [2022-12-14 04:52:41,458 INFO L226 Difference]: Without dead ends: 17855 [2022-12-14 04:52:41,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 386 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6528 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=1056, Invalid=16236, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 04:52:41,478 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 3602 mSDsluCounter, 3521 mSDsCounter, 0 mSdLazyCounter, 11146 mSolverCounterSat, 1975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3675 SdHoareTripleChecker+Valid, 4022 SdHoareTripleChecker+Invalid, 13121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1975 IncrementalHoareTripleChecker+Valid, 11146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:52:41,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3675 Valid, 4022 Invalid, 13121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1975 Valid, 11146 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 04:52:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17855 states. [2022-12-14 04:52:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17855 to 16924. [2022-12-14 04:52:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16924 states, 13036 states have (on average 1.6140687327401044) internal successors, (21041), 13475 states have internal predecessors, (21041), 2849 states have call successors, (2849), 840 states have call predecessors, (2849), 1038 states have return successors, (3798), 2853 states have call predecessors, (3798), 2844 states have call successors, (3798) [2022-12-14 04:52:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16924 states to 16924 states and 27688 transitions. [2022-12-14 04:52:43,067 INFO L78 Accepts]: Start accepts. Automaton has 16924 states and 27688 transitions. Word has length 157 [2022-12-14 04:52:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:52:43,067 INFO L495 AbstractCegarLoop]: Abstraction has 16924 states and 27688 transitions. [2022-12-14 04:52:43,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 9.11111111111111) internal successors, (164), 18 states have internal predecessors, (164), 11 states have call successors, (45), 7 states have call predecessors, (45), 11 states have return successors, (46), 15 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 04:52:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 16924 states and 27688 transitions. [2022-12-14 04:52:43,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 04:52:43,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:52:43,077 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:52:43,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 04:52:43,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:52:43,279 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:52:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:52:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash 590823861, now seen corresponding path program 1 times [2022-12-14 04:52:43,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:52:43,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872669392] [2022-12-14 04:52:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:52:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:52:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 04:52:43,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:52:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872669392] [2022-12-14 04:52:43,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872669392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:52:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652596270] [2022-12-14 04:52:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:52:43,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:52:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:52:43,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:52:43,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 04:52:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:52:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 04:52:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 04:52:44,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:52:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 04:52:44,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652596270] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:52:44,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859646820] [2022-12-14 04:52:44,357 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2022-12-14 04:52:44,357 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:52:44,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:52:44,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:52:44,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:52:49,339 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 410 for LOIs [2022-12-14 04:52:49,394 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 04:53:34,571 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 709 for LOIs [2022-12-14 04:53:39,283 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 35 for LOIs [2022-12-14 04:53:39,552 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 26 for LOIs [2022-12-14 04:53:39,559 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 50 for LOIs [2022-12-14 04:53:39,700 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 44 for LOIs [2022-12-14 04:53:39,710 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 22 for LOIs [2022-12-14 04:53:39,711 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 04:53:42,861 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 04:53:43,423 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 423 for LOIs [2022-12-14 04:53:43,543 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 33 for LOIs [2022-12-14 04:53:43,580 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 72 for LOIs [2022-12-14 04:53:43,587 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 04:53:43,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:55:02,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '374146#(and (= 30 (select |#length| 34)) (= (select (select |#memory_int| 23) 0) 32) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= 30 (select |#length| 25)) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#length| 35) 9) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select |#length| 32) 9) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (not (= 0 ~floorButtons_spc2_0~0)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 36) 25) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 33) 25) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 21 (select |#length| 30)) (= 112 (select (select |#memory_int| 18) 3)) (= (select |#length| 27) 21) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 9 (select |#length| 29)) (= 32 (select (select |#memory_int| 7) 3)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= 30 (select |#length| 28)) (= (select (select |#memory_int| 5) 2) 93) (= (select (select |#memory_int| 14) 0) 32) (= 30 (select |#length| 31)) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 9 (select |#length| 26)) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-12-14 04:55:02,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:55:02,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:02,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 7] total 20 [2022-12-14 04:55:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127163373] [2022-12-14 04:55:02,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:55:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:55:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:55:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=9628, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 04:55:02,129 INFO L87 Difference]: Start difference. First operand 16924 states and 27688 transitions. Second operand has 20 states, 19 states have (on average 9.368421052631579) internal successors, (178), 18 states have internal predecessors, (178), 10 states have call successors, (48), 4 states have call predecessors, (48), 7 states have return successors, (47), 11 states have call predecessors, (47), 9 states have call successors, (47) [2022-12-14 04:55:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:18,202 INFO L93 Difference]: Finished difference Result 52963 states and 90527 transitions. [2022-12-14 04:55:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-14 04:55:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 9.368421052631579) internal successors, (178), 18 states have internal predecessors, (178), 10 states have call successors, (48), 4 states have call predecessors, (48), 7 states have return successors, (47), 11 states have call predecessors, (47), 9 states have call successors, (47) Word has length 155 [2022-12-14 04:55:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:18,390 INFO L225 Difference]: With dead ends: 52963 [2022-12-14 04:55:18,390 INFO L226 Difference]: Without dead ends: 34822 [2022-12-14 04:55:18,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 391 SyntacticMatches, 3 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13351 ImplicationChecksByTransitivity, 83.5s TimeCoverageRelationStatistics Valid=2584, Invalid=34088, Unknown=0, NotChecked=0, Total=36672 [2022-12-14 04:55:18,481 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 6390 mSDsluCounter, 4405 mSDsCounter, 0 mSdLazyCounter, 16042 mSolverCounterSat, 4636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6399 SdHoareTripleChecker+Valid, 5098 SdHoareTripleChecker+Invalid, 20678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4636 IncrementalHoareTripleChecker+Valid, 16042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:18,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6399 Valid, 5098 Invalid, 20678 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4636 Valid, 16042 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-12-14 04:55:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34822 states. [2022-12-14 04:55:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34822 to 30171. [2022-12-14 04:55:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30171 states, 23259 states have (on average 1.6352809665075885) internal successors, (38035), 24128 states have internal predecessors, (38035), 5296 states have call successors, (5296), 1354 states have call predecessors, (5296), 1615 states have return successors, (7120), 5213 states have call predecessors, (7120), 5291 states have call successors, (7120) [2022-12-14 04:55:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30171 states to 30171 states and 50451 transitions. [2022-12-14 04:55:20,898 INFO L78 Accepts]: Start accepts. Automaton has 30171 states and 50451 transitions. Word has length 155 [2022-12-14 04:55:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:20,899 INFO L495 AbstractCegarLoop]: Abstraction has 30171 states and 50451 transitions. [2022-12-14 04:55:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 9.368421052631579) internal successors, (178), 18 states have internal predecessors, (178), 10 states have call successors, (48), 4 states have call predecessors, (48), 7 states have return successors, (47), 11 states have call predecessors, (47), 9 states have call successors, (47) [2022-12-14 04:55:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30171 states and 50451 transitions. [2022-12-14 04:55:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 04:55:20,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:20,905 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:20,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 04:55:21,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 04:55:21,107 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:55:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1520595048, now seen corresponding path program 1 times [2022-12-14 04:55:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:55:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408325242] [2022-12-14 04:55:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:55:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 04:55:21,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408325242] [2022-12-14 04:55:21,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408325242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886402169] [2022-12-14 04:55:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:21,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:21,269 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:21,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8b91652-d00f-4ee0-9171-6d036ea5ca73/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 04:55:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:21,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 04:55:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 04:55:22,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:47,574 WARN L233 SmtUtils]: Spent 24.84s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)