./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:46:44,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:46:44,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:46:44,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:46:44,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:46:44,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:46:44,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:46:44,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:46:44,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:46:44,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:46:44,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:46:44,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:46:44,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:46:44,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:46:44,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:46:44,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:46:44,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:46:44,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:46:44,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:46:44,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:46:44,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:46:44,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:46:44,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:46:44,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:46:44,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:46:44,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:46:44,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:46:44,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:46:44,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:46:44,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:46:44,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:46:44,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:46:44,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:46:44,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:46:44,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:46:44,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:46:44,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:46:44,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:46:44,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:46:44,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:46:44,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:46:44,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:46:44,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:46:44,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:46:44,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:46:44,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:46:44,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:46:44,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:46:44,484 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:46:44,484 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:46:44,484 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:46:44,485 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:46:44,485 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:46:44,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:46:44,485 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:46:44,485 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:46:44,485 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:46:44,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:46:44,486 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:46:44,486 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:46:44,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:46:44,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:46:44,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:46:44,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:46:44,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:46:44,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:46:44,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:46:44,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:46:44,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:46:44,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:46:44,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:46:44,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:46:44,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:46:44,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:46:44,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:44,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:46:44,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:46:44,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:46:44,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:46:44,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:46:44,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:46:44,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:46:44,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:46:44,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-20 22:46:44,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:46:44,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:46:44,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:46:44,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:46:44,772 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:46:44,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-20 22:46:44,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/data/486a609a0/84ef8c007962473ca60c71366c03f750/FLAGfa5eabf77 [2021-11-20 22:46:45,534 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:46:45,535 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-20 22:46:45,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/data/486a609a0/84ef8c007962473ca60c71366c03f750/FLAGfa5eabf77 [2021-11-20 22:46:45,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/data/486a609a0/84ef8c007962473ca60c71366c03f750 [2021-11-20 22:46:45,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:46:45,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:46:45,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:45,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:46:45,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:46:45,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:45" (1/1) ... [2021-11-20 22:46:45,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792075ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:45, skipping insertion in model container [2021-11-20 22:46:45,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:45" (1/1) ... [2021-11-20 22:46:45,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:46:45,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:46:45,995 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-20 22:46:46,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:46,370 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:46:46,383 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-20 22:46:46,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:46,558 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:46:46,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46 WrapperNode [2021-11-20 22:46:46,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:46,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:46,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:46:46,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:46:46,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,668 INFO L137 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 876 [2021-11-20 22:46:46,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:46,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:46:46,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:46:46,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:46:46,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:46:46,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:46:46,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:46:46,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:46:46,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (1/1) ... [2021-11-20 22:46:46,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:46,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:46:46,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bff12a21-7300-4c2e-9493-3e8c1fff1e47/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:46:46,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:46:46,870 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 22:46:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 22:46:46,870 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 22:46:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 22:46:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 22:46:46,871 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 22:46:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 22:46:46,871 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 22:46:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 22:46:46,872 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 22:46:46,872 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 22:46:46,872 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 22:46:46,873 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 22:46:46,873 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 22:46:46,873 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 22:46:46,874 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 22:46:46,874 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 22:46:46,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 22:46:46,874 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 22:46:46,874 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 22:46:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 22:46:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 22:46:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 22:46:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 22:46:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 22:46:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 22:46:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 22:46:46,876 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 22:46:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 22:46:46,876 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 22:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 22:46:46,878 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 22:46:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 22:46:46,878 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 22:46:46,879 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 22:46:46,879 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 22:46:46,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:46:46,879 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-20 22:46:46,879 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-20 22:46:46,879 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 22:46:46,880 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 22:46:46,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 22:46:46,880 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 22:46:46,880 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 22:46:46,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 22:46:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-20 22:46:46,911 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-20 22:46:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-20 22:46:46,912 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-20 22:46:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:46:46,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:46:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 22:46:46,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 22:46:47,141 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:46:47,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:46:48,149 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:46:48,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:46:48,744 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 22:46:48,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:48 BoogieIcfgContainer [2021-11-20 22:46:48,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:46:48,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:46:48,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:46:48,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:46:48,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:45" (1/3) ... [2021-11-20 22:46:48,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbb8aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:48, skipping insertion in model container [2021-11-20 22:46:48,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:46" (2/3) ... [2021-11-20 22:46:48,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbb8aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:48, skipping insertion in model container [2021-11-20 22:46:48,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:48" (3/3) ... [2021-11-20 22:46:48,760 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-11-20 22:46:48,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:46:48,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:46:48,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:46:48,831 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:46:48,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:46:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-20 22:46:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 22:46:48,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:48,884 INFO L514 BasicCegarLoop]: 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] [2021-11-20 22:46:48,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:48,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash -520217047, now seen corresponding path program 1 times [2021-11-20 22:46:48,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:48,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705587476] [2021-11-20 22:46:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:48,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:49,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:49,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705587476] [2021-11-20 22:46:49,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705587476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:49,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:49,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:46:49,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011869513] [2021-11-20 22:46:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:49,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 22:46:49,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 22:46:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:46:49,291 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:46:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:49,457 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-20 22:46:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 22:46:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-20 22:46:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:49,488 INFO L225 Difference]: With dead ends: 401 [2021-11-20 22:46:49,489 INFO L226 Difference]: Without dead ends: 379 [2021-11-20 22:46:49,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 22:46:49,500 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:49,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:46:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-20 22:46:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-20 22:46:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 22:46:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-20 22:46:49,665 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-20 22:46:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:49,666 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-20 22:46:49,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:46:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-20 22:46:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 22:46:49,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:49,675 INFO L514 BasicCegarLoop]: 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] [2021-11-20 22:46:49,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:46:49,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash 832256424, now seen corresponding path program 1 times [2021-11-20 22:46:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352717494] [2021-11-20 22:46:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:49,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:49,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352717494] [2021-11-20 22:46:49,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352717494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:49,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:49,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:46:49,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820737876] [2021-11-20 22:46:49,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:49,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:46:49,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:46:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:46:49,928 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 22:46:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:52,052 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-20 22:46:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:46:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-20 22:46:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:52,064 INFO L225 Difference]: With dead ends: 1243 [2021-11-20 22:46:52,064 INFO L226 Difference]: Without dead ends: 880 [2021-11-20 22:46:52,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:46:52,071 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1600 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:52,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 1253 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 22:46:52,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-20 22:46:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-20 22:46:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2021-11-20 22:46:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-20 22:46:52,197 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-20 22:46:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-20 22:46:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 22:46:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-20 22:46:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 22:46:52,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:52,215 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:46:52,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:46:52,216 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:52,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2075127646, now seen corresponding path program 1 times [2021-11-20 22:46:52,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:52,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551433458] [2021-11-20 22:46:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:52,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:52,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:52,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551433458] [2021-11-20 22:46:52,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551433458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:52,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:52,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 22:46:52,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652213414] [2021-11-20 22:46:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:52,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:46:52,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:46:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:46:52,434 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 22:46:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:57,789 INFO L93 Difference]: Finished difference Result 3318 states and 5440 transitions. [2021-11-20 22:46:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 22:46:57,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2021-11-20 22:46:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:57,834 INFO L225 Difference]: With dead ends: 3318 [2021-11-20 22:46:57,834 INFO L226 Difference]: Without dead ends: 2541 [2021-11-20 22:46:57,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:46:57,850 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 2544 mSDsluCounter, 3871 mSDsCounter, 0 mSdLazyCounter, 7456 mSolverCounterSat, 2198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 9654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2198 IncrementalHoareTripleChecker+Valid, 7456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:57,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 4646 Invalid, 9654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2198 Valid, 7456 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 22:46:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-20 22:46:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2021-11-20 22:46:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1233 states have (on average 1.5660989456609895) internal successors, (1931), 1305 states have internal predecessors, (1931), 471 states have call successors, (471), 82 states have call predecessors, (471), 94 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2021-11-20 22:46:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2021-11-20 22:46:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2021-11-20 22:46:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:58,094 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2021-11-20 22:46:58,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 22:46:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2021-11-20 22:46:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 22:46:58,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:58,099 INFO L514 BasicCegarLoop]: 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] [2021-11-20 22:46:58,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:46:58,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:58,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1142842916, now seen corresponding path program 1 times [2021-11-20 22:46:58,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:58,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085067155] [2021-11-20 22:46:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:58,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:46:58,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:58,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085067155] [2021-11-20 22:46:58,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085067155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:58,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:58,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 22:46:58,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968453595] [2021-11-20 22:46:58,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:58,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:46:58,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:46:58,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:46:58,346 INFO L87 Difference]: Start difference. First operand 1799 states and 2892 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-20 22:47:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:01,212 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2021-11-20 22:47:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 22:47:01,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2021-11-20 22:47:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:01,242 INFO L225 Difference]: With dead ends: 5054 [2021-11-20 22:47:01,243 INFO L226 Difference]: Without dead ends: 3273 [2021-11-20 22:47:01,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-20 22:47:01,261 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 1741 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:01,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 3171 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 3417 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:47:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-20 22:47:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2021-11-20 22:47:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2207 states have (on average 1.5894879927503398) internal successors, (3508), 2298 states have internal predecessors, (3508), 729 states have call successors, (729), 144 states have call predecessors, (729), 174 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2021-11-20 22:47:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2021-11-20 22:47:01,544 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2021-11-20 22:47:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:01,545 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2021-11-20 22:47:01,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-20 22:47:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2021-11-20 22:47:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 22:47:01,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:01,549 INFO L514 BasicCegarLoop]: 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] [2021-11-20 22:47:01,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:47:01,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:01,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2017325801, now seen corresponding path program 1 times [2021-11-20 22:47:01,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:01,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654590083] [2021-11-20 22:47:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:01,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:47:01,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654590083] [2021-11-20 22:47:01,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654590083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:01,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:01,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 22:47:01,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739364241] [2021-11-20 22:47:01,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:01,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:47:01,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:47:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:47:01,682 INFO L87 Difference]: Start difference. First operand 3111 states and 5029 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 22:47:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:02,088 INFO L93 Difference]: Finished difference Result 5558 states and 9001 transitions. [2021-11-20 22:47:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:47:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-20 22:47:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:02,115 INFO L225 Difference]: With dead ends: 5558 [2021-11-20 22:47:02,116 INFO L226 Difference]: Without dead ends: 3223 [2021-11-20 22:47:02,132 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:47:02,135 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 6 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:02,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3355 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:47:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-11-20 22:47:02,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3181. [2021-11-20 22:47:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2257 states have (on average 1.5764288879042978) internal successors, (3558), 2348 states have internal predecessors, (3558), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 732 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-20 22:47:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5129 transitions. [2021-11-20 22:47:02,374 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5129 transitions. Word has length 82 [2021-11-20 22:47:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:02,375 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5129 transitions. [2021-11-20 22:47:02,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 22:47:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5129 transitions. [2021-11-20 22:47:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 22:47:02,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:02,380 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-20 22:47:02,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:47:02,381 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 245288187, now seen corresponding path program 1 times [2021-11-20 22:47:02,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:02,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394041515] [2021-11-20 22:47:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:02,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:47:02,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394041515] [2021-11-20 22:47:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394041515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:02,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:02,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 22:47:02,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751337308] [2021-11-20 22:47:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:02,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:47:02,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:47:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:47:02,545 INFO L87 Difference]: Start difference. First operand 3181 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 22:47:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:02,845 INFO L93 Difference]: Finished difference Result 5664 states and 9141 transitions. [2021-11-20 22:47:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:47:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-20 22:47:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:02,874 INFO L225 Difference]: With dead ends: 5664 [2021-11-20 22:47:02,874 INFO L226 Difference]: Without dead ends: 3273 [2021-11-20 22:47:02,890 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:47:02,891 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 7 mSDsluCounter, 2943 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:02,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 3331 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:47:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-20 22:47:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3191. [2021-11-20 22:47:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2267 states have (on average 1.5738861932068813) internal successors, (3568), 2348 states have internal predecessors, (3568), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 742 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-20 22:47:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5139 transitions. [2021-11-20 22:47:03,165 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5139 transitions. Word has length 83 [2021-11-20 22:47:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:03,165 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 5139 transitions. [2021-11-20 22:47:03,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 22:47:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5139 transitions. [2021-11-20 22:47:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 22:47:03,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:03,173 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-20 22:47:03,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:47:03,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash 126875419, now seen corresponding path program 1 times [2021-11-20 22:47:03,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:03,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187593392] [2021-11-20 22:47:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:03,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:47:03,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:03,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187593392] [2021-11-20 22:47:03,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187593392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:03,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:03,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 22:47:03,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754001533] [2021-11-20 22:47:03,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:03,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:47:03,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:03,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:47:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:47:03,493 INFO L87 Difference]: Start difference. First operand 3191 states and 5139 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 22:47:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:07,263 INFO L93 Difference]: Finished difference Result 10230 states and 16629 transitions. [2021-11-20 22:47:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:47:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2021-11-20 22:47:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:07,322 INFO L225 Difference]: With dead ends: 10230 [2021-11-20 22:47:07,323 INFO L226 Difference]: Without dead ends: 7057 [2021-11-20 22:47:07,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:47:07,347 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 2176 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 3760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:07,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2248 Valid, 2193 Invalid, 3760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 22:47:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2021-11-20 22:47:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 6416. [2021-11-20 22:47:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 4548 states have (on average 1.5529903254177662) internal successors, (7063), 4743 states have internal predecessors, (7063), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 395 states have return successors, (1728), 1492 states have call predecessors, (1728), 1467 states have call successors, (1728) [2021-11-20 22:47:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 10263 transitions. [2021-11-20 22:47:08,042 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 10263 transitions. Word has length 83 [2021-11-20 22:47:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:08,043 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 10263 transitions. [2021-11-20 22:47:08,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 22:47:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 10263 transitions. [2021-11-20 22:47:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 22:47:08,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:08,052 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:08,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:47:08,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1217659309, now seen corresponding path program 1 times [2021-11-20 22:47:08,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:08,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763471105] [2021-11-20 22:47:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:08,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:47:08,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:08,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763471105] [2021-11-20 22:47:08,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763471105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:08,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:08,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 22:47:08,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718705417] [2021-11-20 22:47:08,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:08,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:47:08,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:47:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:47:08,241 INFO L87 Difference]: Start difference. First operand 6416 states and 10263 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 22:47:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:11,092 INFO L93 Difference]: Finished difference Result 16067 states and 25940 transitions. [2021-11-20 22:47:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:47:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 89 [2021-11-20 22:47:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:11,175 INFO L225 Difference]: With dead ends: 16067 [2021-11-20 22:47:11,176 INFO L226 Difference]: Without dead ends: 10783 [2021-11-20 22:47:11,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:47:11,217 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 3310 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 3473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1550 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:11,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 1585 Invalid, 3473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1550 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 22:47:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10783 states. [2021-11-20 22:47:12,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10783 to 10535. [2021-11-20 22:47:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10535 states, 7317 states have (on average 1.5181085144184776) internal successors, (11108), 7680 states have internal predecessors, (11108), 2526 states have call successors, (2526), 523 states have call predecessors, (2526), 691 states have return successors, (3040), 2527 states have call predecessors, (3040), 2521 states have call successors, (3040) [2021-11-20 22:47:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 16674 transitions. [2021-11-20 22:47:12,209 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 16674 transitions. Word has length 89 [2021-11-20 22:47:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:12,210 INFO L470 AbstractCegarLoop]: Abstraction has 10535 states and 16674 transitions. [2021-11-20 22:47:12,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 22:47:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 16674 transitions. [2021-11-20 22:47:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 22:47:12,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:12,215 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:12,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:47:12,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 982523748, now seen corresponding path program 1 times [2021-11-20 22:47:12,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935320123] [2021-11-20 22:47:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:12,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:47:12,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935320123] [2021-11-20 22:47:12,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935320123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:12,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:12,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 22:47:12,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403416052] [2021-11-20 22:47:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:12,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:47:12,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:47:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:47:12,362 INFO L87 Difference]: Start difference. First operand 10535 states and 16674 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 22:47:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:14,697 INFO L93 Difference]: Finished difference Result 20824 states and 33110 transitions. [2021-11-20 22:47:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:47:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-11-20 22:47:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:14,770 INFO L225 Difference]: With dead ends: 20824 [2021-11-20 22:47:14,770 INFO L226 Difference]: Without dead ends: 11720 [2021-11-20 22:47:14,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:47:14,816 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 986 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:14,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1939 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 22:47:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11720 states. [2021-11-20 22:47:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11720 to 10715. [2021-11-20 22:47:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10715 states, 7437 states have (on average 1.5135135135135136) internal successors, (11256), 7828 states have internal predecessors, (11256), 2530 states have call successors, (2530), 555 states have call predecessors, (2530), 747 states have return successors, (3118), 2527 states have call predecessors, (3118), 2525 states have call successors, (3118) [2021-11-20 22:47:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10715 states to 10715 states and 16904 transitions. [2021-11-20 22:47:15,792 INFO L78 Accepts]: Start accepts. Automaton has 10715 states and 16904 transitions. Word has length 92 [2021-11-20 22:47:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:15,792 INFO L470 AbstractCegarLoop]: Abstraction has 10715 states and 16904 transitions. [2021-11-20 22:47:15,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 22:47:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 10715 states and 16904 transitions. [2021-11-20 22:47:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 22:47:15,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:15,797 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1] [2021-11-20 22:47:15,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:47:15,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1413202189, now seen corresponding path program 1 times [2021-11-20 22:47:15,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:15,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965355691] [2021-11-20 22:47:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:15,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:47:15,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965355691] [2021-11-20 22:47:15,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965355691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:15,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:15,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:47:15,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108314066] [2021-11-20 22:47:15,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:15,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:47:15,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:47:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:47:15,897 INFO L87 Difference]: Start difference. First operand 10715 states and 16904 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:17,710 INFO L93 Difference]: Finished difference Result 28072 states and 44883 transitions. [2021-11-20 22:47:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:47:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-11-20 22:47:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:17,790 INFO L225 Difference]: With dead ends: 28072 [2021-11-20 22:47:17,790 INFO L226 Difference]: Without dead ends: 17374 [2021-11-20 22:47:17,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:47:17,831 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1155 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:17,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 981 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 22:47:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17374 states. [2021-11-20 22:47:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17374 to 16005. [2021-11-20 22:47:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16005 states, 11133 states have (on average 1.515314829785323) internal successors, (16870), 11765 states have internal predecessors, (16870), 3710 states have call successors, (3710), 831 states have call predecessors, (3710), 1161 states have return successors, (4803), 3674 states have call predecessors, (4803), 3705 states have call successors, (4803) [2021-11-20 22:47:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16005 states to 16005 states and 25383 transitions. [2021-11-20 22:47:19,047 INFO L78 Accepts]: Start accepts. Automaton has 16005 states and 25383 transitions. Word has length 95 [2021-11-20 22:47:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:19,049 INFO L470 AbstractCegarLoop]: Abstraction has 16005 states and 25383 transitions. [2021-11-20 22:47:19,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 16005 states and 25383 transitions. [2021-11-20 22:47:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 22:47:19,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:19,055 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:47:19,055 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1770846730, now seen corresponding path program 1 times [2021-11-20 22:47:19,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007010544] [2021-11-20 22:47:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:19,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:47:19,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007010544] [2021-11-20 22:47:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007010544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:19,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:19,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:47:19,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706913432] [2021-11-20 22:47:19,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:19,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:47:19,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:47:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:47:19,195 INFO L87 Difference]: Start difference. First operand 16005 states and 25383 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:21,831 INFO L93 Difference]: Finished difference Result 43308 states and 70007 transitions. [2021-11-20 22:47:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:47:21,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2021-11-20 22:47:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:21,997 INFO L225 Difference]: With dead ends: 43308 [2021-11-20 22:47:21,997 INFO L226 Difference]: Without dead ends: 27321 [2021-11-20 22:47:22,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:47:22,065 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1142 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:22,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 990 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 22:47:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27321 states. [2021-11-20 22:47:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27321 to 25538. [2021-11-20 22:47:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25538 states, 17800 states have (on average 1.5169662921348315) internal successors, (27002), 18969 states have internal predecessors, (27002), 5753 states have call successors, (5753), 1383 states have call predecessors, (5753), 1984 states have return successors, (8120), 5626 states have call predecessors, (8120), 5748 states have call successors, (8120) [2021-11-20 22:47:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 40875 transitions. [2021-11-20 22:47:24,127 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 40875 transitions. Word has length 97 [2021-11-20 22:47:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:24,128 INFO L470 AbstractCegarLoop]: Abstraction has 25538 states and 40875 transitions. [2021-11-20 22:47:24,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 40875 transitions. [2021-11-20 22:47:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 22:47:24,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:24,133 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:24,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 22:47:24,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 873093487, now seen corresponding path program 1 times [2021-11-20 22:47:24,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:24,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843521288] [2021-11-20 22:47:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:24,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:47:24,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843521288] [2021-11-20 22:47:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843521288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:24,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:24,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:47:24,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957547415] [2021-11-20 22:47:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:24,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:47:24,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:47:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:47:24,279 INFO L87 Difference]: Start difference. First operand 25538 states and 40875 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:28,350 INFO L93 Difference]: Finished difference Result 72202 states and 119368 transitions. [2021-11-20 22:47:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:47:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2021-11-20 22:47:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:28,595 INFO L225 Difference]: With dead ends: 72202 [2021-11-20 22:47:28,595 INFO L226 Difference]: Without dead ends: 46684 [2021-11-20 22:47:28,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:47:28,687 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1129 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:28,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1198 Valid, 999 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 22:47:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46684 states. [2021-11-20 22:47:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46684 to 45083. [2021-11-20 22:47:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45083 states, 31429 states have (on average 1.515002068153616) internal successors, (47615), 33722 states have internal predecessors, (47615), 9949 states have call successors, (9949), 2487 states have call predecessors, (9949), 3704 states have return successors, (15840), 9650 states have call predecessors, (15840), 9944 states have call successors, (15840) [2021-11-20 22:47:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45083 states to 45083 states and 73404 transitions. [2021-11-20 22:47:32,365 INFO L78 Accepts]: Start accepts. Automaton has 45083 states and 73404 transitions. Word has length 97 [2021-11-20 22:47:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:32,365 INFO L470 AbstractCegarLoop]: Abstraction has 45083 states and 73404 transitions. [2021-11-20 22:47:32,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 45083 states and 73404 transitions. [2021-11-20 22:47:32,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 22:47:32,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:32,370 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:32,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 22:47:32,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash 972238700, now seen corresponding path program 1 times [2021-11-20 22:47:32,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:32,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562158038] [2021-11-20 22:47:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:32,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:47:32,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562158038] [2021-11-20 22:47:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562158038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:32,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:32,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:47:32,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494715182] [2021-11-20 22:47:32,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:32,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:47:32,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:47:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:47:32,478 INFO L87 Difference]: Start difference. First operand 45083 states and 73404 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:39,786 INFO L93 Difference]: Finished difference Result 131416 states and 225810 transitions. [2021-11-20 22:47:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:47:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2021-11-20 22:47:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:40,270 INFO L225 Difference]: With dead ends: 131416 [2021-11-20 22:47:40,271 INFO L226 Difference]: Without dead ends: 86357 [2021-11-20 22:47:40,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:47:40,460 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1116 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:40,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1011 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 22:47:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86357 states. [2021-11-20 22:47:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86357 to 83692. [2021-11-20 22:47:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83692 states, 58270 states have (on average 1.5097305646130084) internal successors, (87972), 62931 states have internal predecessors, (87972), 18157 states have call successors, (18157), 4695 states have call predecessors, (18157), 7264 states have return successors, (34232), 17514 states have call predecessors, (34232), 18152 states have call successors, (34232) [2021-11-20 22:47:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83692 states to 83692 states and 140361 transitions. [2021-11-20 22:47:47,643 INFO L78 Accepts]: Start accepts. Automaton has 83692 states and 140361 transitions. Word has length 99 [2021-11-20 22:47:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:47,644 INFO L470 AbstractCegarLoop]: Abstraction has 83692 states and 140361 transitions. [2021-11-20 22:47:47,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 22:47:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 83692 states and 140361 transitions. [2021-11-20 22:47:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 22:47:47,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:47,652 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:47:47,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 22:47:47,653 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1519923665, now seen corresponding path program 1 times [2021-11-20 22:47:47,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:47,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902018630] [2021-11-20 22:47:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:47,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:47:47,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:47,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902018630] [2021-11-20 22:47:47,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902018630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:47:47,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:47:47,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:47:47,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272831801] [2021-11-20 22:47:47,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:47:47,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:47:47,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:47,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:47:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:47:47,754 INFO L87 Difference]: Start difference. First operand 83692 states and 140361 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16)