./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:07:21,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:07:21,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:07:21,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:07:21,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:07:21,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:07:22,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:07:22,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:07:22,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:07:22,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:07:22,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:07:22,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:07:22,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:07:22,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:07:22,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:07:22,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:07:22,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:07:22,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:07:22,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:07:22,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:07:22,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:07:22,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:07:22,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:07:22,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:07:22,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:07:22,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:07:22,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:07:22,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:07:22,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:07:22,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:07:22,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:07:22,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:07:22,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:07:22,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:07:22,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:07:22,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:07:22,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:07:22,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:07:22,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:07:22,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:07:22,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:07:22,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:07:22,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:07:22,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:07:22,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:07:22,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:07:22,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:07:22,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:07:22,111 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:07:22,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:07:22,112 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:07:22,112 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:07:22,112 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:07:22,112 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:07:22,113 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:07:22,113 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:07:22,113 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:07:22,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:07:22,114 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:07:22,114 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:07:22,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:07:22,115 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:07:22,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:07:22,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:07:22,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:07:22,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:07:22,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:07:22,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:07:22,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:07:22,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:07:22,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:07:22,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:07:22,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:07:22,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:07:22,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:07:22,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:07:22,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:07:22,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:07:22,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:07:22,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:07:22,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:07:22,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:07:22,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:07:22,120 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_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2021-11-23 03:07:22,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:07:22,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:07:22,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:07:22,370 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:07:22,371 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:07:22,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2021-11-23 03:07:22,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/data/b39e5cbfc/31128675238546e588a831303804463c/FLAG381f3c920 [2021-11-23 03:07:23,131 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:07:23,132 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2021-11-23 03:07:23,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/data/b39e5cbfc/31128675238546e588a831303804463c/FLAG381f3c920 [2021-11-23 03:07:23,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/data/b39e5cbfc/31128675238546e588a831303804463c [2021-11-23 03:07:23,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:07:23,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:07:23,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:07:23,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:07:23,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:07:23,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:23" (1/1) ... [2021-11-23 03:07:23,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d261108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:23, skipping insertion in model container [2021-11-23 03:07:23,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:07:23" (1/1) ... [2021-11-23 03:07:23,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:07:23,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:07:23,704 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_fbbac3cd-2984-4b20-bdd0-093717c7aa66/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2021-11-23 03:07:24,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:07:24,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:07:24,076 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_fbbac3cd-2984-4b20-bdd0-093717c7aa66/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2021-11-23 03:07:24,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:07:24,179 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:07:24,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24 WrapperNode [2021-11-23 03:07:24,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:07:24,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:07:24,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:07:24,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:07:24,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,271 INFO L137 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 905 [2021-11-23 03:07:24,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:07:24,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:07:24,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:07:24,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:07:24,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:07:24,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:07:24,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:07:24,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:07:24,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (1/1) ... [2021-11-23 03:07:24,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:07:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:07:24,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:07:24,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:07:24,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:07:24,486 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 03:07:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 03:07:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 03:07:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 03:07:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 03:07:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 03:07:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 03:07:24,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 03:07:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 03:07:24,488 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 03:07:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-23 03:07:24,488 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-23 03:07:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 03:07:24,489 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 03:07:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 03:07:24,490 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 03:07:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-23 03:07:24,490 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-23 03:07:24,490 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 03:07:24,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 03:07:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 03:07:24,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 03:07:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 03:07:24,491 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 03:07:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 03:07:24,492 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 03:07:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 03:07:24,492 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 03:07:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 03:07:24,492 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 03:07:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 03:07:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 03:07:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 03:07:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 03:07:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 03:07:24,495 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 03:07:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 03:07:24,495 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 03:07:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:07:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-23 03:07:24,495 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-23 03:07:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 03:07:24,496 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 03:07:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 03:07:24,497 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 03:07:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 03:07:24,498 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 03:07:24,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:07:24,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:07:24,500 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 03:07:24,500 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 03:07:24,735 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:07:24,738 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:07:26,006 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:07:26,729 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:07:26,730 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:07:26,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:26 BoogieIcfgContainer [2021-11-23 03:07:26,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:07:26,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:07:26,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:07:26,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:07:26,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:07:23" (1/3) ... [2021-11-23 03:07:26,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0c7e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:26, skipping insertion in model container [2021-11-23 03:07:26,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:07:24" (2/3) ... [2021-11-23 03:07:26,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0c7e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:07:26, skipping insertion in model container [2021-11-23 03:07:26,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:07:26" (3/3) ... [2021-11-23 03:07:26,745 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2021-11-23 03:07:26,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:07:26,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:07:26,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:07:26,842 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 [2021-11-23 03:07:26,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:07:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-23 03:07:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 03:07:26,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:26,926 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] [2021-11-23 03:07:26,927 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -847922989, now seen corresponding path program 1 times [2021-11-23 03:07:26,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210493547] [2021-11-23 03:07:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:26,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:07:27,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210493547] [2021-11-23 03:07:27,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210493547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:27,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:27,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:07:27,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380860444] [2021-11-23 03:07:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:27,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:07:27,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:07:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:27,547 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:07:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:28,169 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2021-11-23 03:07:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:07:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2021-11-23 03:07:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:28,194 INFO L225 Difference]: With dead ends: 844 [2021-11-23 03:07:28,194 INFO L226 Difference]: Without dead ends: 483 [2021-11-23 03:07:28,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:07:28,206 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 282 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:28,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2315 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:07:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-23 03:07:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2021-11-23 03:07:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-23 03:07:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2021-11-23 03:07:28,305 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2021-11-23 03:07:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:28,307 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2021-11-23 03:07:28,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:07:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2021-11-23 03:07:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:07:28,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:28,317 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] [2021-11-23 03:07:28,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:07:28,318 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 249604261, now seen corresponding path program 1 times [2021-11-23 03:07:28,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:28,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575937728] [2021-11-23 03:07:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:28,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:07:28,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:28,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575937728] [2021-11-23 03:07:28,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575937728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:28,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:28,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 03:07:28,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864166037] [2021-11-23 03:07:28,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:28,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:07:28,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:07:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:07:28,644 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 03:07:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:31,747 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2021-11-23 03:07:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:07:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2021-11-23 03:07:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:31,769 INFO L225 Difference]: With dead ends: 1280 [2021-11-23 03:07:31,769 INFO L226 Difference]: Without dead ends: 923 [2021-11-23 03:07:31,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:07:31,782 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1729 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:31,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 3083 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 03:07:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-23 03:07:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2021-11-23 03:07:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2021-11-23 03:07:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2021-11-23 03:07:31,934 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2021-11-23 03:07:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:31,937 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2021-11-23 03:07:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 03:07:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2021-11-23 03:07:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 03:07:31,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:31,948 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] [2021-11-23 03:07:31,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:07:31,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1662862818, now seen corresponding path program 1 times [2021-11-23 03:07:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667112309] [2021-11-23 03:07:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:31,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:07:32,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:32,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667112309] [2021-11-23 03:07:32,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667112309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:32,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:32,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:07:32,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812808265] [2021-11-23 03:07:32,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:32,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:07:32,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:07:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:07:32,283 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 03:07:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:36,019 INFO L93 Difference]: Finished difference Result 3774 states and 6176 transitions. [2021-11-23 03:07:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:07:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-11-23 03:07:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:36,048 INFO L225 Difference]: With dead ends: 3774 [2021-11-23 03:07:36,048 INFO L226 Difference]: Without dead ends: 2924 [2021-11-23 03:07:36,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:07:36,056 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 2588 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:36,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2695 Valid, 2112 Invalid, 3605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 03:07:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-11-23 03:07:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2652. [2021-11-23 03:07:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1862 states have (on average 1.5918367346938775) internal successors, (2964), 1975 states have internal predecessors, (2964), 645 states have call successors, (645), 128 states have call predecessors, (645), 144 states have return successors, (696), 619 states have call predecessors, (696), 640 states have call successors, (696) [2021-11-23 03:07:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4305 transitions. [2021-11-23 03:07:36,370 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4305 transitions. Word has length 73 [2021-11-23 03:07:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:36,370 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 4305 transitions. [2021-11-23 03:07:36,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 03:07:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4305 transitions. [2021-11-23 03:07:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 03:07:36,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:36,375 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] [2021-11-23 03:07:36,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:07:36,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546044, now seen corresponding path program 1 times [2021-11-23 03:07:36,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:36,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622296090] [2021-11-23 03:07:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:36,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:07:36,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:36,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622296090] [2021-11-23 03:07:36,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622296090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:36,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:36,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:07:36,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776147997] [2021-11-23 03:07:36,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:36,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:07:36,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:07:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:07:36,503 INFO L87 Difference]: Start difference. First operand 2652 states and 4305 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:07:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:36,895 INFO L93 Difference]: Finished difference Result 4528 states and 7355 transitions. [2021-11-23 03:07:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:07:36,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2021-11-23 03:07:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:36,921 INFO L225 Difference]: With dead ends: 4528 [2021-11-23 03:07:36,922 INFO L226 Difference]: Without dead ends: 2919 [2021-11-23 03:07:36,933 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 [2021-11-23 03:07:36,934 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 42 mSDsluCounter, 3072 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3484 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:36,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3484 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-11-23 03:07:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2725. [2021-11-23 03:07:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 1913 states have (on average 1.5760585467851542) internal successors, (3015), 2028 states have internal predecessors, (3015), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 639 states have call predecessors, (743), 640 states have call successors, (743) [2021-11-23 03:07:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4403 transitions. [2021-11-23 03:07:37,210 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4403 transitions. Word has length 72 [2021-11-23 03:07:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:37,211 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 4403 transitions. [2021-11-23 03:07:37,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:07:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4403 transitions. [2021-11-23 03:07:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 03:07:37,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:37,214 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] [2021-11-23 03:07:37,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:07:37,215 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 460163070, now seen corresponding path program 1 times [2021-11-23 03:07:37,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:37,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762402324] [2021-11-23 03:07:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:37,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:07:37,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:37,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762402324] [2021-11-23 03:07:37,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762402324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:37,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:37,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:07:37,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034058973] [2021-11-23 03:07:37,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:37,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:07:37,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:07:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:07:37,315 INFO L87 Difference]: Start difference. First operand 2725 states and 4403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:07:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:37,686 INFO L93 Difference]: Finished difference Result 4626 states and 7478 transitions. [2021-11-23 03:07:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:07:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2021-11-23 03:07:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:37,711 INFO L225 Difference]: With dead ends: 4626 [2021-11-23 03:07:37,712 INFO L226 Difference]: Without dead ends: 2970 [2021-11-23 03:07:37,721 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 [2021-11-23 03:07:37,722 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:37,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3503 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:07:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-11-23 03:07:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2736. [2021-11-23 03:07:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1924 states have (on average 1.5727650727650728) internal successors, (3026), 2028 states have internal predecessors, (3026), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 650 states have call predecessors, (743), 640 states have call successors, (743) [2021-11-23 03:07:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4414 transitions. [2021-11-23 03:07:37,945 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4414 transitions. Word has length 73 [2021-11-23 03:07:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:37,945 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4414 transitions. [2021-11-23 03:07:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:07:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4414 transitions. [2021-11-23 03:07:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 03:07:37,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:37,949 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] [2021-11-23 03:07:37,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:07:37,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -407194107, now seen corresponding path program 1 times [2021-11-23 03:07:37,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:37,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125366037] [2021-11-23 03:07:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:37,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:07:38,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:38,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125366037] [2021-11-23 03:07:38,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125366037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:38,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:38,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:07:38,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85075694] [2021-11-23 03:07:38,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:38,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:07:38,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:07:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:07:38,158 INFO L87 Difference]: Start difference. First operand 2736 states and 4414 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-23 03:07:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:40,694 INFO L93 Difference]: Finished difference Result 6186 states and 10031 transitions. [2021-11-23 03:07:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:07:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 79 [2021-11-23 03:07:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:40,732 INFO L225 Difference]: With dead ends: 6186 [2021-11-23 03:07:40,733 INFO L226 Difference]: Without dead ends: 4163 [2021-11-23 03:07:40,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:07:40,751 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1926 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 3213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:40,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2091 Valid, 1779 Invalid, 3213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 03:07:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-11-23 03:07:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 3987. [2021-11-23 03:07:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 2754 states have (on average 1.532316630355846) internal successors, (4220), 2918 states have internal predecessors, (4220), 970 states have call successors, (970), 210 states have call predecessors, (970), 262 states have return successors, (1138), 964 states have call predecessors, (1138), 965 states have call successors, (1138) [2021-11-23 03:07:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 6328 transitions. [2021-11-23 03:07:41,126 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 6328 transitions. Word has length 79 [2021-11-23 03:07:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:41,127 INFO L470 AbstractCegarLoop]: Abstraction has 3987 states and 6328 transitions. [2021-11-23 03:07:41,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-23 03:07:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 6328 transitions. [2021-11-23 03:07:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 03:07:41,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:41,136 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] [2021-11-23 03:07:41,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:07:41,136 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash -403940076, now seen corresponding path program 1 times [2021-11-23 03:07:41,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:41,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444322072] [2021-11-23 03:07:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:41,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:07:41,291 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:41,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444322072] [2021-11-23 03:07:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444322072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:41,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:41,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:07:41,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839658784] [2021-11-23 03:07:41,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:41,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:07:41,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:07:41,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:07:41,294 INFO L87 Difference]: Start difference. First operand 3987 states and 6328 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-23 03:07:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:43,403 INFO L93 Difference]: Finished difference Result 7540 states and 12021 transitions. [2021-11-23 03:07:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:07:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-11-23 03:07:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:43,443 INFO L225 Difference]: With dead ends: 7540 [2021-11-23 03:07:43,443 INFO L226 Difference]: Without dead ends: 4493 [2021-11-23 03:07:43,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:07:43,464 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 974 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:43,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 1886 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 03:07:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2021-11-23 03:07:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 4068. [2021-11-23 03:07:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2984 states have internal predecessors, (4286), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2021-11-23 03:07:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 6431 transitions. [2021-11-23 03:07:43,878 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 6431 transitions. Word has length 82 [2021-11-23 03:07:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 4068 states and 6431 transitions. [2021-11-23 03:07:43,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-23 03:07:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 6431 transitions. [2021-11-23 03:07:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:07:43,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:43,883 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] [2021-11-23 03:07:43,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:07:43,884 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1278460408, now seen corresponding path program 1 times [2021-11-23 03:07:43,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:43,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775367496] [2021-11-23 03:07:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:43,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:07:43,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:43,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775367496] [2021-11-23 03:07:43,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775367496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:43,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:43,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:07:43,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277805102] [2021-11-23 03:07:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:43,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:07:43,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:07:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:43,990 INFO L87 Difference]: Start difference. First operand 4068 states and 6431 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:45,454 INFO L93 Difference]: Finished difference Result 11601 states and 18615 transitions. [2021-11-23 03:07:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:07:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-23 03:07:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:45,516 INFO L225 Difference]: With dead ends: 11601 [2021-11-23 03:07:45,517 INFO L226 Difference]: Without dead ends: 7550 [2021-11-23 03:07:45,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:45,543 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1154 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:45,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 949 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:07:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-11-23 03:07:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7004. [2021-11-23 03:07:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 4874 states have (on average 1.5354944604021337) internal successors, (7484), 5186 states have internal predecessors, (7484), 1645 states have call successors, (1645), 363 states have call predecessors, (1645), 484 states have return successors, (2059), 1585 states have call predecessors, (2059), 1640 states have call successors, (2059) [2021-11-23 03:07:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 11188 transitions. [2021-11-23 03:07:46,141 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 11188 transitions. Word has length 86 [2021-11-23 03:07:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:46,141 INFO L470 AbstractCegarLoop]: Abstraction has 7004 states and 11188 transitions. [2021-11-23 03:07:46,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 11188 transitions. [2021-11-23 03:07:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 03:07:46,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:46,145 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] [2021-11-23 03:07:46,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:07:46,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1175558529, now seen corresponding path program 1 times [2021-11-23 03:07:46,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:46,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668807566] [2021-11-23 03:07:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:46,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:07:46,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668807566] [2021-11-23 03:07:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668807566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:46,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:46,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:07:46,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498456280] [2021-11-23 03:07:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:07:46,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:46,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:07:46,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:46,258 INFO L87 Difference]: Start difference. First operand 7004 states and 11188 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:47,956 INFO L93 Difference]: Finished difference Result 19992 states and 32462 transitions. [2021-11-23 03:07:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:07:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-23 03:07:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:48,058 INFO L225 Difference]: With dead ends: 19992 [2021-11-23 03:07:48,058 INFO L226 Difference]: Without dead ends: 13006 [2021-11-23 03:07:48,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:48,105 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 1132 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:48,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 968 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:07:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13006 states. [2021-11-23 03:07:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13006 to 12361. [2021-11-23 03:07:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12361 states, 8642 states have (on average 1.539342744735015) internal successors, (13303), 9254 states have internal predecessors, (13303), 2823 states have call successors, (2823), 639 states have call predecessors, (2823), 895 states have return successors, (3794), 2667 states have call predecessors, (3794), 2818 states have call successors, (3794) [2021-11-23 03:07:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12361 states to 12361 states and 19920 transitions. [2021-11-23 03:07:49,338 INFO L78 Accepts]: Start accepts. Automaton has 12361 states and 19920 transitions. Word has length 86 [2021-11-23 03:07:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:49,340 INFO L470 AbstractCegarLoop]: Abstraction has 12361 states and 19920 transitions. [2021-11-23 03:07:49,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12361 states and 19920 transitions. [2021-11-23 03:07:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 03:07:49,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:49,345 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] [2021-11-23 03:07:49,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:07:49,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2082443398, now seen corresponding path program 1 times [2021-11-23 03:07:49,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:49,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210606375] [2021-11-23 03:07:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:49,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:07:49,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210606375] [2021-11-23 03:07:49,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210606375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:49,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:07:49,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644962951] [2021-11-23 03:07:49,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:49,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:07:49,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:07:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:49,456 INFO L87 Difference]: Start difference. First operand 12361 states and 19920 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:51,945 INFO L93 Difference]: Finished difference Result 36173 states and 59825 transitions. [2021-11-23 03:07:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:07:51,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2021-11-23 03:07:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:52,167 INFO L225 Difference]: With dead ends: 36173 [2021-11-23 03:07:52,167 INFO L226 Difference]: Without dead ends: 23832 [2021-11-23 03:07:52,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:52,218 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1119 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:52,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 977 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:07:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23832 states. [2021-11-23 03:07:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23832 to 22941. [2021-11-23 03:07:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22941 states, 16065 states have (on average 1.538375350140056) internal successors, (24714), 17297 states have internal predecessors, (24714), 5136 states have call successors, (5136), 1191 states have call predecessors, (5136), 1739 states have return successors, (7631), 4788 states have call predecessors, (7631), 5131 states have call successors, (7631) [2021-11-23 03:07:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22941 states to 22941 states and 37481 transitions. [2021-11-23 03:07:54,279 INFO L78 Accepts]: Start accepts. Automaton has 22941 states and 37481 transitions. Word has length 87 [2021-11-23 03:07:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:07:54,280 INFO L470 AbstractCegarLoop]: Abstraction has 22941 states and 37481 transitions. [2021-11-23 03:07:54,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 22941 states and 37481 transitions. [2021-11-23 03:07:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 03:07:54,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:07:54,284 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] [2021-11-23 03:07:54,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:07:54,285 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:07:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:07:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash 131107171, now seen corresponding path program 1 times [2021-11-23 03:07:54,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:07:54,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443604352] [2021-11-23 03:07:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:07:54,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:07:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:07:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:07:54,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:07:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443604352] [2021-11-23 03:07:54,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443604352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:07:54,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:07:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:07:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902657291] [2021-11-23 03:07:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:07:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:07:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:07:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:07:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:07:54,403 INFO L87 Difference]: Start difference. First operand 22941 states and 37481 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:07:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:07:58,126 INFO L93 Difference]: Finished difference Result 68167 states and 116281 transitions. [2021-11-23 03:07:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:07:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2021-11-23 03:07:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:07:58,464 INFO L225 Difference]: With dead ends: 68167 [2021-11-23 03:07:58,464 INFO L226 Difference]: Without dead ends: 45250 [2021-11-23 03:07:58,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:07:58,568 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 1106 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:07:58,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 989 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:07:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45250 states. [2021-11-23 03:08:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45250 to 43813. [2021-11-23 03:08:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43813 states, 30668 states have (on average 1.5341398200078258) internal successors, (47049), 33192 states have internal predecessors, (47049), 9665 states have call successors, (9665), 2295 states have call predecessors, (9665), 3479 states have return successors, (16600), 8933 states have call predecessors, (16600), 9660 states have call successors, (16600) [2021-11-23 03:08:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43813 states to 43813 states and 73314 transitions. [2021-11-23 03:08:02,577 INFO L78 Accepts]: Start accepts. Automaton has 43813 states and 73314 transitions. Word has length 88 [2021-11-23 03:08:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:02,578 INFO L470 AbstractCegarLoop]: Abstraction has 43813 states and 73314 transitions. [2021-11-23 03:08:02,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:08:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 43813 states and 73314 transitions. [2021-11-23 03:08:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 03:08:02,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:02,582 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] [2021-11-23 03:08:02,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:08:02,582 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash -230769816, now seen corresponding path program 1 times [2021-11-23 03:08:02,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:02,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610983159] [2021-11-23 03:08:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:02,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:08:02,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610983159] [2021-11-23 03:08:02,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610983159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:02,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:08:02,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:08:02,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461414386] [2021-11-23 03:08:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:02,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:08:02,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:08:02,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:08:02,673 INFO L87 Difference]: Start difference. First operand 43813 states and 73314 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:08:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:09,738 INFO L93 Difference]: Finished difference Result 131595 states and 236728 transitions. [2021-11-23 03:08:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:08:09,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2021-11-23 03:08:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:10,554 INFO L225 Difference]: With dead ends: 131595 [2021-11-23 03:08:10,555 INFO L226 Difference]: Without dead ends: 87804 [2021-11-23 03:08:10,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:08:10,748 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1097 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:10,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 1004 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:08:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87804 states. [2021-11-23 03:08:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87804 to 84841. [2021-11-23 03:08:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84841 states, 59468 states have (on average 1.5318490616802314) internal successors, (91096), 64475 states have internal predecessors, (91096), 18523 states have call successors, (18523), 4495 states have call predecessors, (18523), 6849 states have return successors, (37286), 17022 states have call predecessors, (37286), 18518 states have call successors, (37286) [2021-11-23 03:08:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84841 states to 84841 states and 146905 transitions. [2021-11-23 03:08:18,018 INFO L78 Accepts]: Start accepts. Automaton has 84841 states and 146905 transitions. Word has length 89 [2021-11-23 03:08:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:08:18,019 INFO L470 AbstractCegarLoop]: Abstraction has 84841 states and 146905 transitions. [2021-11-23 03:08:18,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:08:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 84841 states and 146905 transitions. [2021-11-23 03:08:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 03:08:18,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:08:18,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:08:18,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:08:18,028 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:08:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:08:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1913624543, now seen corresponding path program 1 times [2021-11-23 03:08:18,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:08:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272959137] [2021-11-23 03:08:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:18,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:08:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 03:08:18,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:08:18,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272959137] [2021-11-23 03:08:18,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272959137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:08:18,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418835372] [2021-11-23 03:08:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:08:18,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:08:18,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:08:18,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:08:18,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbbac3cd-2984-4b20-bdd0-093717c7aa66/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:08:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:08:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:08:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:08:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:08:18,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:08:18,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418835372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:08:18,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:08:18,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-23 03:08:18,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405920128] [2021-11-23 03:08:18,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:08:18,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:08:18,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:08:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:08:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:08:18,766 INFO L87 Difference]: Start difference. First operand 84841 states and 146905 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 03:08:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:08:25,291 INFO L93 Difference]: Finished difference Result 177270 states and 317720 transitions. [2021-11-23 03:08:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:08:25,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2021-11-23 03:08:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:08:25,896 INFO L225 Difference]: With dead ends: 177270 [2021-11-23 03:08:25,896 INFO L226 Difference]: Without dead ends: 92446 [2021-11-23 03:08:26,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:08:26,242 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 213 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:08:26,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1419 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:08:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92446 states.