./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:13:10,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:13:10,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:13:10,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:13:10,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:13:10,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:13:10,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:13:10,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:13:10,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:13:10,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:13:10,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:13:10,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:13:10,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:13:10,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:13:10,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:13:10,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:13:10,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:13:10,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:13:10,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:13:10,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:13:10,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:13:10,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:13:10,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:13:10,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:13:10,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:13:10,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:13:10,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:13:10,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:13:10,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:13:10,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:13:10,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:13:10,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:13:10,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:13:10,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:13:10,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:13:10,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:13:10,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:13:10,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:13:10,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:13:10,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:13:10,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:13:10,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:13:10,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:13:10,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:13:10,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:13:10,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:13:10,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:13:10,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:13:10,564 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:13:10,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:13:10,564 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:13:10,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:13:10,565 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:13:10,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:13:10,566 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:13:10,566 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:13:10,566 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:13:10,567 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:13:10,567 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:13:10,567 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:13:10,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:13:10,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:13:10,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:13:10,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:13:10,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:13:10,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:13:10,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:13:10,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:13:10,571 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:13:10,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:13:10,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:13:10,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:13:10,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:13:10,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:13:10,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:13:10,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:13:10,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:13:10,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:13:10,574 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:13:10,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:13:10,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:13:10,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:13:10,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:13:10,576 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_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2021-11-21 00:13:10,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:13:10,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:13:10,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:13:10,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:13:10,913 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:13:10,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-21 00:13:11,008 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/data/c10c88470/398d3e9b491c4ef483a1bad0afd0c02c/FLAGb34f9027f [2021-11-21 00:13:11,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:13:11,714 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-21 00:13:11,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/data/c10c88470/398d3e9b491c4ef483a1bad0afd0c02c/FLAGb34f9027f [2021-11-21 00:13:11,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/data/c10c88470/398d3e9b491c4ef483a1bad0afd0c02c [2021-11-21 00:13:11,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:13:11,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:13:11,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:13:11,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:13:11,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:13:11,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:13:11" (1/1) ... [2021-11-21 00:13:11,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f43ca05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:11, skipping insertion in model container [2021-11-21 00:13:11,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:13:11" (1/1) ... [2021-11-21 00:13:11,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:13:12,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:13:12,725 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_2f5b783f-12da-46ac-8871-a68ec5cddb45/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-21 00:13:12,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:13:12,905 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:13:12,986 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_2f5b783f-12da-46ac-8871-a68ec5cddb45/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-21 00:13:13,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:13:13,075 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:13:13,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13 WrapperNode [2021-11-21 00:13:13,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:13:13,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:13:13,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:13:13,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:13:13,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,213 INFO L137 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 928 [2021-11-21 00:13:13,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:13:13,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:13:13,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:13:13,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:13:13,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:13:13,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:13:13,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:13:13,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:13:13,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (1/1) ... [2021-11-21 00:13:13,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:13:13,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:13,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:13:13,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:13:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:13:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-21 00:13:13,498 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-21 00:13:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 00:13:13,499 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 00:13:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 00:13:13,499 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 00:13:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 00:13:13,500 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 00:13:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-21 00:13:13,500 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-21 00:13:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 00:13:13,500 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 00:13:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 00:13:13,501 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 00:13:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 00:13:13,501 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 00:13:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 00:13:13,502 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 00:13:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 00:13:13,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 00:13:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 00:13:13,502 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 00:13:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 00:13:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 00:13:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 00:13:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 00:13:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 00:13:13,503 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 00:13:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-21 00:13:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-21 00:13:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 00:13:13,504 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 00:13:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 00:13:13,505 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 00:13:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-21 00:13:13,505 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-21 00:13:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 00:13:13,506 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 00:13:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 00:13:13,506 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 00:13:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 00:13:13,506 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 00:13:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:13:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 00:13:13,507 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 00:13:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 00:13:13,507 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 00:13:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 00:13:13,508 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 00:13:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 00:13:13,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 00:13:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:13:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:13:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 00:13:13,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 00:13:13,781 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:13:13,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:13:15,154 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:13:15,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:13:15,930 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:13:15,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:13:15 BoogieIcfgContainer [2021-11-21 00:13:15,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:13:15,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:13:15,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:13:15,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:13:15,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:13:11" (1/3) ... [2021-11-21 00:13:15,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8c469f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:13:15, skipping insertion in model container [2021-11-21 00:13:15,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:13" (2/3) ... [2021-11-21 00:13:15,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8c469f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:13:15, skipping insertion in model container [2021-11-21 00:13:15,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:13:15" (3/3) ... [2021-11-21 00:13:15,949 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2021-11-21 00:13:15,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:13:15,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:13:16,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:13:16,053 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 [2021-11-21 00:13:16,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:13:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-21 00:13:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 00:13:16,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:16,142 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] [2021-11-21 00:13:16,143 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash -414763503, now seen corresponding path program 1 times [2021-11-21 00:13:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:16,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553367004] [2021-11-21 00:13:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:16,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:16,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:16,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553367004] [2021-11-21 00:13:16,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553367004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:16,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:16,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:13:16,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216344390] [2021-11-21 00:13:16,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:16,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:13:16,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:16,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:13:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:13:16,914 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-21 00:13:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:18,353 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2021-11-21 00:13:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:13:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-11-21 00:13:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:18,393 INFO L225 Difference]: With dead ends: 1150 [2021-11-21 00:13:18,394 INFO L226 Difference]: Without dead ends: 748 [2021-11-21 00:13:18,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:13:18,418 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 545 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:18,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 2990 Invalid, 928 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [159 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 00:13:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-21 00:13:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2021-11-21 00:13:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2021-11-21 00:13:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2021-11-21 00:13:18,583 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2021-11-21 00:13:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:18,584 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2021-11-21 00:13:18,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-21 00:13:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2021-11-21 00:13:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 00:13:18,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:18,591 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] [2021-11-21 00:13:18,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:13:18,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash -415147964, now seen corresponding path program 1 times [2021-11-21 00:13:18,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657191147] [2021-11-21 00:13:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:18,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:18,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:18,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657191147] [2021-11-21 00:13:18,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657191147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:18,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:18,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:13:18,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939297522] [2021-11-21 00:13:18,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:18,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:13:18,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:13:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:13:18,867 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 00:13:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:20,278 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2021-11-21 00:13:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:13:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 80 [2021-11-21 00:13:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:20,314 INFO L225 Difference]: With dead ends: 2669 [2021-11-21 00:13:20,314 INFO L226 Difference]: Without dead ends: 1941 [2021-11-21 00:13:20,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:13:20,336 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 847 mSDsluCounter, 3251 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 4037 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:20,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 4037 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 00:13:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-21 00:13:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2021-11-21 00:13:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2021-11-21 00:13:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2021-11-21 00:13:20,573 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 80 [2021-11-21 00:13:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:20,575 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2021-11-21 00:13:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 00:13:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2021-11-21 00:13:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 00:13:20,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:20,599 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] [2021-11-21 00:13:20,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:13:20,599 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1728178894, now seen corresponding path program 1 times [2021-11-21 00:13:20,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:20,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009404392] [2021-11-21 00:13:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:20,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:13:20,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009404392] [2021-11-21 00:13:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009404392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170333688] [2021-11-21 00:13:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:20,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:20,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:20,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:20,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:13:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:13:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:21,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170333688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:21,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:21,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:13:21,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124904480] [2021-11-21 00:13:21,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:21,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:13:21,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:13:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:13:21,526 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 00:13:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:21,885 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2021-11-21 00:13:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:13:21,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2021-11-21 00:13:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:21,916 INFO L225 Difference]: With dead ends: 3959 [2021-11-21 00:13:21,916 INFO L226 Difference]: Without dead ends: 2584 [2021-11-21 00:13:21,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:13:21,962 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 562 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:21,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:13:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-11-21 00:13:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2021-11-21 00:13:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2021-11-21 00:13:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2021-11-21 00:13:22,165 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 79 [2021-11-21 00:13:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:22,166 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2021-11-21 00:13:22,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 00:13:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2021-11-21 00:13:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 00:13:22,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:22,171 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] [2021-11-21 00:13:22,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:22,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:22,396 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1342972250, now seen corresponding path program 1 times [2021-11-21 00:13:22,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:22,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434531974] [2021-11-21 00:13:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:22,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:13:22,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:22,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434531974] [2021-11-21 00:13:22,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434531974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368423833] [2021-11-21 00:13:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:22,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:22,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:22,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:13:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:13:22,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:23,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:23,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368423833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:23,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:23,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:13:23,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925289300] [2021-11-21 00:13:23,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:13:23,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:13:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:13:23,203 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 00:13:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:23,559 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2021-11-21 00:13:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:13:23,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2021-11-21 00:13:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:23,597 INFO L225 Difference]: With dead ends: 5622 [2021-11-21 00:13:23,597 INFO L226 Difference]: Without dead ends: 3125 [2021-11-21 00:13:23,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:13:23,628 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 559 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:23,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1176 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:13:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-11-21 00:13:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2021-11-21 00:13:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2021-11-21 00:13:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2021-11-21 00:13:23,915 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2021-11-21 00:13:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:23,916 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2021-11-21 00:13:23,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-21 00:13:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2021-11-21 00:13:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:13:23,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:23,921 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] [2021-11-21 00:13:23,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:24,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:24,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1934255269, now seen corresponding path program 1 times [2021-11-21 00:13:24,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:24,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230464303] [2021-11-21 00:13:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:24,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:24,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:24,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230464303] [2021-11-21 00:13:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230464303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:24,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230490303] [2021-11-21 00:13:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:24,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:24,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:24,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:24,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:13:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:13:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:25,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230490303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:25,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:25,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-21 00:13:25,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381704845] [2021-11-21 00:13:25,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:25,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:13:25,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:25,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:13:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:13:25,054 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-21 00:13:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:25,686 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2021-11-21 00:13:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:13:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2021-11-21 00:13:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:25,732 INFO L225 Difference]: With dead ends: 6167 [2021-11-21 00:13:25,733 INFO L226 Difference]: Without dead ends: 3902 [2021-11-21 00:13:25,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:25,761 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:25,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:13:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-11-21 00:13:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2021-11-21 00:13:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2021-11-21 00:13:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2021-11-21 00:13:26,109 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 87 [2021-11-21 00:13:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:26,110 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2021-11-21 00:13:26,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-21 00:13:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2021-11-21 00:13:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 00:13:26,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:26,115 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 00:13:26,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:26,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:26,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1975805511, now seen corresponding path program 1 times [2021-11-21 00:13:26,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844179688] [2021-11-21 00:13:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:26,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:13:26,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:26,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844179688] [2021-11-21 00:13:26,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844179688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:26,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989850020] [2021-11-21 00:13:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:26,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:26,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:26,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:26,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:13:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:13:27,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:13:27,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:27,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989850020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:27,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:27,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:13:27,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780479911] [2021-11-21 00:13:27,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:27,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:13:27,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:13:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:27,481 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-21 00:13:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:28,656 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2021-11-21 00:13:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:13:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2021-11-21 00:13:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:28,700 INFO L225 Difference]: With dead ends: 5778 [2021-11-21 00:13:28,701 INFO L226 Difference]: Without dead ends: 3325 [2021-11-21 00:13:28,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:13:28,782 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 519 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:28,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 2356 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 00:13:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2021-11-21 00:13:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2021-11-21 00:13:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2021-11-21 00:13:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2021-11-21 00:13:29,135 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 89 [2021-11-21 00:13:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:29,135 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2021-11-21 00:13:29,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-21 00:13:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2021-11-21 00:13:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 00:13:29,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:29,141 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 00:13:29,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:29,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:29,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash -141184640, now seen corresponding path program 1 times [2021-11-21 00:13:29,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:29,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122097977] [2021-11-21 00:13:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:29,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:13:29,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122097977] [2021-11-21 00:13:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122097977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446386862] [2021-11-21 00:13:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:29,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:29,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:29,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:13:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:13:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:13:30,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:13:30,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446386862] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:30,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:13:30,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2021-11-21 00:13:30,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556587255] [2021-11-21 00:13:30,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:30,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:13:30,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:13:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:13:30,768 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:13:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:34,755 INFO L93 Difference]: Finished difference Result 8634 states and 14349 transitions. [2021-11-21 00:13:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:13:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2021-11-21 00:13:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:34,828 INFO L225 Difference]: With dead ends: 8634 [2021-11-21 00:13:34,828 INFO L226 Difference]: Without dead ends: 6545 [2021-11-21 00:13:34,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:13:34,864 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 2584 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 1255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2671 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 3822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1255 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:34,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2671 Valid, 3015 Invalid, 3822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1255 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-21 00:13:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2021-11-21 00:13:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 6050. [2021-11-21 00:13:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 4287 states have (on average 1.5264753907161186) internal successors, (6544), 4523 states have internal predecessors, (6544), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 417 states have return successors, (1858), 1292 states have call predecessors, (1858), 1337 states have call successors, (1858) [2021-11-21 00:13:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 9747 transitions. [2021-11-21 00:13:35,500 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 9747 transitions. Word has length 92 [2021-11-21 00:13:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:35,502 INFO L470 AbstractCegarLoop]: Abstraction has 6050 states and 9747 transitions. [2021-11-21 00:13:35,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:13:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 9747 transitions. [2021-11-21 00:13:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-21 00:13:35,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:35,509 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:35,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:35,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:13:35,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash 657145104, now seen corresponding path program 1 times [2021-11-21 00:13:35,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:35,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761023347] [2021-11-21 00:13:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:35,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:13:35,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:35,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761023347] [2021-11-21 00:13:35,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761023347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:35,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698625497] [2021-11-21 00:13:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:35,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:35,934 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:35,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:13:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:13:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:13:36,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698625497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:36,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:36,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-21 00:13:36,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9383250] [2021-11-21 00:13:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:36,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:13:36,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:13:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:13:36,563 INFO L87 Difference]: Start difference. First operand 6050 states and 9747 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-21 00:13:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:37,589 INFO L93 Difference]: Finished difference Result 10883 states and 17626 transitions. [2021-11-21 00:13:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:13:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2021-11-21 00:13:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:37,668 INFO L225 Difference]: With dead ends: 10883 [2021-11-21 00:13:37,668 INFO L226 Difference]: Without dead ends: 6066 [2021-11-21 00:13:37,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:37,719 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 419 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:37,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:13:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2021-11-21 00:13:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 6050. [2021-11-21 00:13:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 4287 states have (on average 1.5264753907161186) internal successors, (6544), 4523 states have internal predecessors, (6544), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 417 states have return successors, (1850), 1292 states have call predecessors, (1850), 1337 states have call successors, (1850) [2021-11-21 00:13:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 9739 transitions. [2021-11-21 00:13:38,354 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 9739 transitions. Word has length 96 [2021-11-21 00:13:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 6050 states and 9739 transitions. [2021-11-21 00:13:38,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-21 00:13:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 9739 transitions. [2021-11-21 00:13:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 00:13:38,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:38,363 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:38,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:38,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:38,585 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash -584114713, now seen corresponding path program 1 times [2021-11-21 00:13:38,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:38,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754865239] [2021-11-21 00:13:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:38,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 00:13:38,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754865239] [2021-11-21 00:13:38,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754865239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:38,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241657143] [2021-11-21 00:13:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:38,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:38,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:13:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:13:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:13:39,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:39,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241657143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:39,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:39,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:13:39,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820441465] [2021-11-21 00:13:39,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:39,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:13:39,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:13:39,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:39,469 INFO L87 Difference]: Start difference. First operand 6050 states and 9739 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:13:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:40,123 INFO L93 Difference]: Finished difference Result 11579 states and 19108 transitions. [2021-11-21 00:13:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:13:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2021-11-21 00:13:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:40,187 INFO L225 Difference]: With dead ends: 11579 [2021-11-21 00:13:40,187 INFO L226 Difference]: Without dead ends: 6374 [2021-11-21 00:13:40,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:40,227 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 13 mSDsluCounter, 3216 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:40,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3644 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:13:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6374 states. [2021-11-21 00:13:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6374 to 6222. [2021-11-21 00:13:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 4403 states have (on average 1.5126050420168067) internal successors, (6660), 4651 states have internal predecessors, (6660), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 473 states have return successors, (2177), 1336 states have call predecessors, (2177), 1337 states have call successors, (2177) [2021-11-21 00:13:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 10182 transitions. [2021-11-21 00:13:40,790 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 10182 transitions. Word has length 122 [2021-11-21 00:13:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:40,790 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 10182 transitions. [2021-11-21 00:13:40,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:13:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 10182 transitions. [2021-11-21 00:13:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-21 00:13:40,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:40,799 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:40,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:13:41,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:41,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash 31459966, now seen corresponding path program 1 times [2021-11-21 00:13:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560583361] [2021-11-21 00:13:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:41,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:13:41,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:41,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560583361] [2021-11-21 00:13:41,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560583361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:41,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729168546] [2021-11-21 00:13:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:41,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:41,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:41,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:41,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:13:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:41,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:13:41,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:13:41,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:41,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729168546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:41,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:13:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880361228] [2021-11-21 00:13:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:13:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:13:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:41,967 INFO L87 Difference]: Start difference. First operand 6222 states and 10182 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:13:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:42,609 INFO L93 Difference]: Finished difference Result 11859 states and 19745 transitions. [2021-11-21 00:13:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:13:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 124 [2021-11-21 00:13:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:42,666 INFO L225 Difference]: With dead ends: 11859 [2021-11-21 00:13:42,666 INFO L226 Difference]: Without dead ends: 6490 [2021-11-21 00:13:42,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:42,708 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 13 mSDsluCounter, 3201 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:42,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3625 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:13:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-11-21 00:13:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6250. [2021-11-21 00:13:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6250 states, 4431 states have (on average 1.5093658316407133) internal successors, (6688), 4651 states have internal predecessors, (6688), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 473 states have return successors, (2177), 1364 states have call predecessors, (2177), 1337 states have call successors, (2177) [2021-11-21 00:13:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6250 states to 6250 states and 10210 transitions. [2021-11-21 00:13:43,258 INFO L78 Accepts]: Start accepts. Automaton has 6250 states and 10210 transitions. Word has length 124 [2021-11-21 00:13:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:43,258 INFO L470 AbstractCegarLoop]: Abstraction has 6250 states and 10210 transitions. [2021-11-21 00:13:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:13:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6250 states and 10210 transitions. [2021-11-21 00:13:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 00:13:43,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:43,266 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:43,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:43,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:43,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash -132933723, now seen corresponding path program 1 times [2021-11-21 00:13:43,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:43,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985429110] [2021-11-21 00:13:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:43,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 00:13:43,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985429110] [2021-11-21 00:13:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985429110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298556634] [2021-11-21 00:13:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:43,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:43,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:43,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:13:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:13:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:13:44,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:44,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298556634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:44,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:44,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:13:44,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395181502] [2021-11-21 00:13:44,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:44,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:13:44,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:13:44,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:44,405 INFO L87 Difference]: Start difference. First operand 6250 states and 10210 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:13:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:45,038 INFO L93 Difference]: Finished difference Result 11915 states and 19801 transitions. [2021-11-21 00:13:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:13:45,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 122 [2021-11-21 00:13:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:45,088 INFO L225 Difference]: With dead ends: 11915 [2021-11-21 00:13:45,089 INFO L226 Difference]: Without dead ends: 6518 [2021-11-21 00:13:45,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:13:45,127 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 13 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:45,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3620 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:13:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6518 states. [2021-11-21 00:13:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6518 to 6278. [2021-11-21 00:13:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6278 states, 4459 states have (on average 1.5061673020856694) internal successors, (6716), 4651 states have internal predecessors, (6716), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 473 states have return successors, (2177), 1392 states have call predecessors, (2177), 1337 states have call successors, (2177) [2021-11-21 00:13:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 10238 transitions. [2021-11-21 00:13:45,544 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 10238 transitions. Word has length 122 [2021-11-21 00:13:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 6278 states and 10238 transitions. [2021-11-21 00:13:45,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:13:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 10238 transitions. [2021-11-21 00:13:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-21 00:13:45,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:45,556 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:45,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:13:45,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 200924281, now seen corresponding path program 1 times [2021-11-21 00:13:45,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298020668] [2021-11-21 00:13:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:45,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:13:45,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:45,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298020668] [2021-11-21 00:13:45,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298020668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:45,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500474823] [2021-11-21 00:13:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:45,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:45,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:45,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:13:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:13:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:13:46,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:46,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500474823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:46,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:46,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-21 00:13:46,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282406117] [2021-11-21 00:13:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:46,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:13:46,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:13:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:13:46,736 INFO L87 Difference]: Start difference. First operand 6278 states and 10238 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:13:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:47,393 INFO L93 Difference]: Finished difference Result 12963 states and 21778 transitions. [2021-11-21 00:13:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:13:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 135 [2021-11-21 00:13:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:47,451 INFO L225 Difference]: With dead ends: 12963 [2021-11-21 00:13:47,451 INFO L226 Difference]: Without dead ends: 6030 [2021-11-21 00:13:47,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:13:47,499 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 247 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:47,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 2894 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:13:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6030 states. [2021-11-21 00:13:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6030 to 6030. [2021-11-21 00:13:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 4260 states have (on average 1.4774647887323944) internal successors, (6294), 4452 states have internal predecessors, (6294), 1312 states have call successors, (1312), 372 states have call predecessors, (1312), 457 states have return successors, (2112), 1349 states have call predecessors, (2112), 1304 states have call successors, (2112) [2021-11-21 00:13:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 9718 transitions. [2021-11-21 00:13:48,046 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 9718 transitions. Word has length 135 [2021-11-21 00:13:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:48,049 INFO L470 AbstractCegarLoop]: Abstraction has 6030 states and 9718 transitions. [2021-11-21 00:13:48,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:13:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 9718 transitions. [2021-11-21 00:13:48,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-21 00:13:48,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:48,064 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:48,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:48,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:13:48,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1769883872, now seen corresponding path program 1 times [2021-11-21 00:13:48,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:48,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748801200] [2021-11-21 00:13:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:48,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:13:48,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748801200] [2021-11-21 00:13:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748801200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289285303] [2021-11-21 00:13:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:48,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:48,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:48,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:13:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:48,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:13:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:13:49,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:49,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289285303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:49,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:49,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-21 00:13:49,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967312862] [2021-11-21 00:13:49,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:49,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:13:49,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:13:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:13:49,183 INFO L87 Difference]: Start difference. First operand 6030 states and 9718 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:13:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:49,866 INFO L93 Difference]: Finished difference Result 13038 states and 21458 transitions. [2021-11-21 00:13:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:13:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 136 [2021-11-21 00:13:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:49,934 INFO L225 Difference]: With dead ends: 13038 [2021-11-21 00:13:49,934 INFO L226 Difference]: Without dead ends: 7677 [2021-11-21 00:13:49,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:13:49,983 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 268 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2882 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:49,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2882 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:13:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7677 states. [2021-11-21 00:13:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7677 to 7677. [2021-11-21 00:13:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7677 states, 5668 states have (on average 1.5047635850388144) internal successors, (8529), 5891 states have internal predecessors, (8529), 1492 states have call successors, (1492), 400 states have call predecessors, (1492), 516 states have return successors, (2292), 1529 states have call predecessors, (2292), 1484 states have call successors, (2292) [2021-11-21 00:13:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 12313 transitions. [2021-11-21 00:13:50,603 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 12313 transitions. Word has length 136 [2021-11-21 00:13:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:50,603 INFO L470 AbstractCegarLoop]: Abstraction has 7677 states and 12313 transitions. [2021-11-21 00:13:50,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:13:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 12313 transitions. [2021-11-21 00:13:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 00:13:50,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:50,618 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:50,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:50,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:13:50,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:50,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1163519774, now seen corresponding path program 1 times [2021-11-21 00:13:50,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:50,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825844228] [2021-11-21 00:13:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:50,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 00:13:51,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825844228] [2021-11-21 00:13:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825844228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:51,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729814757] [2021-11-21 00:13:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:51,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:51,027 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:51,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:13:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 00:13:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:13:52,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:52,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729814757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:52,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:52,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-21 00:13:52,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303173565] [2021-11-21 00:13:52,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:52,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:13:52,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:13:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:13:52,292 INFO L87 Difference]: Start difference. First operand 7677 states and 12313 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-21 00:13:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:57,165 INFO L93 Difference]: Finished difference Result 31275 states and 52296 transitions. [2021-11-21 00:13:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:13:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 137 [2021-11-21 00:13:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:57,378 INFO L225 Difference]: With dead ends: 31275 [2021-11-21 00:13:57,378 INFO L226 Difference]: Without dead ends: 23870 [2021-11-21 00:13:57,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:13:57,502 INFO L933 BasicCegarLoop]: 2546 mSDtfsCounter, 2981 mSDsluCounter, 4452 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 6721 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:57,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2995 Valid, 6721 Invalid, 3408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 00:13:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23870 states. [2021-11-21 00:13:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23870 to 20148. [2021-11-21 00:13:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20148 states, 15183 states have (on average 1.4774418757821248) internal successors, (22432), 15603 states have internal predecessors, (22432), 3529 states have call successors, (3529), 1080 states have call predecessors, (3529), 1435 states have return successors, (7127), 3656 states have call predecessors, (7127), 3511 states have call successors, (7127) [2021-11-21 00:13:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20148 states to 20148 states and 33088 transitions. [2021-11-21 00:13:59,091 INFO L78 Accepts]: Start accepts. Automaton has 20148 states and 33088 transitions. Word has length 137 [2021-11-21 00:13:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:59,092 INFO L470 AbstractCegarLoop]: Abstraction has 20148 states and 33088 transitions. [2021-11-21 00:13:59,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-21 00:13:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20148 states and 33088 transitions. [2021-11-21 00:13:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 00:13:59,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:59,120 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:59,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:59,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:13:59,341 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1226868321, now seen corresponding path program 1 times [2021-11-21 00:13:59,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:59,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810192647] [2021-11-21 00:13:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:59,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:13:59,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810192647] [2021-11-21 00:13:59,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810192647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256080246] [2021-11-21 00:13:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:59,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:59,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:59,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:13:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:59,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:13:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:14:00,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:14:00,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256080246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:00,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:14:00,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-21 00:14:00,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271319208] [2021-11-21 00:14:00,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:00,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:00,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:14:00,026 INFO L87 Difference]: Start difference. First operand 20148 states and 33088 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:14:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:01,436 INFO L93 Difference]: Finished difference Result 40221 states and 68808 transitions. [2021-11-21 00:14:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:14:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 139 [2021-11-21 00:14:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:01,653 INFO L225 Difference]: With dead ends: 40221 [2021-11-21 00:14:01,653 INFO L226 Difference]: Without dead ends: 22533 [2021-11-21 00:14:02,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:14:02,014 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 105 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:02,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1379 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:14:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22533 states. [2021-11-21 00:14:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22533 to 20344. [2021-11-21 00:14:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20344 states, 15351 states have (on average 1.4740407791023387) internal successors, (22628), 15771 states have internal predecessors, (22628), 3557 states have call successors, (3557), 1080 states have call predecessors, (3557), 1435 states have return successors, (7155), 3684 states have call predecessors, (7155), 3539 states have call successors, (7155) [2021-11-21 00:14:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20344 states to 20344 states and 33340 transitions. [2021-11-21 00:14:03,373 INFO L78 Accepts]: Start accepts. Automaton has 20344 states and 33340 transitions. Word has length 139 [2021-11-21 00:14:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:03,373 INFO L470 AbstractCegarLoop]: Abstraction has 20344 states and 33340 transitions. [2021-11-21 00:14:03,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:14:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20344 states and 33340 transitions. [2021-11-21 00:14:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 00:14:03,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:03,399 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:03,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:03,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:03,621 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash 94562958, now seen corresponding path program 1 times [2021-11-21 00:14:03,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:03,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078899642] [2021-11-21 00:14:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:03,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:14:03,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078899642] [2021-11-21 00:14:03,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078899642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386791295] [2021-11-21 00:14:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:03,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:03,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:03,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:14:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:14:04,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:14:04,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:14:04,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386791295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:04,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:14:04,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-21 00:14:04,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114186668] [2021-11-21 00:14:04,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:04,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:14:04,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:04,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:14:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:14:04,594 INFO L87 Difference]: Start difference. First operand 20344 states and 33340 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-21 00:14:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:09,067 INFO L93 Difference]: Finished difference Result 43553 states and 72728 transitions. [2021-11-21 00:14:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:14:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 139 [2021-11-21 00:14:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:09,231 INFO L225 Difference]: With dead ends: 43553 [2021-11-21 00:14:09,232 INFO L226 Difference]: Without dead ends: 22778 [2021-11-21 00:14:09,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:14:09,362 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1665 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 3560 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 4678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 3560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:09,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 2030 Invalid, 4678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 3560 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 00:14:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22778 states. [2021-11-21 00:14:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22778 to 20324. [2021-11-21 00:14:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20324 states, 15331 states have (on average 1.4743982779988258) internal successors, (22604), 15751 states have internal predecessors, (22604), 3557 states have call successors, (3557), 1080 states have call predecessors, (3557), 1435 states have return successors, (7155), 3684 states have call predecessors, (7155), 3539 states have call successors, (7155) [2021-11-21 00:14:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20324 states to 20324 states and 33316 transitions. [2021-11-21 00:14:11,372 INFO L78 Accepts]: Start accepts. Automaton has 20324 states and 33316 transitions. Word has length 139 [2021-11-21 00:14:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:11,372 INFO L470 AbstractCegarLoop]: Abstraction has 20324 states and 33316 transitions. [2021-11-21 00:14:11,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-21 00:14:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20324 states and 33316 transitions. [2021-11-21 00:14:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 00:14:11,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:11,402 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:11,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 00:14:11,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:14:11,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1474063787, now seen corresponding path program 1 times [2021-11-21 00:14:11,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:11,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890308925] [2021-11-21 00:14:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:11,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 00:14:11,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:11,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890308925] [2021-11-21 00:14:11,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890308925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072193548] [2021-11-21 00:14:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:11,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:11,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:11,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:11,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:14:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:12,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:14:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:14:12,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:14:12,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072193548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:12,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:14:12,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-11-21 00:14:12,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681909507] [2021-11-21 00:14:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:12,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:12,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:14:12,701 INFO L87 Difference]: Start difference. First operand 20324 states and 33316 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 00:14:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:14,587 INFO L93 Difference]: Finished difference Result 46508 states and 78816 transitions. [2021-11-21 00:14:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:14:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 145 [2021-11-21 00:14:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:14,764 INFO L225 Difference]: With dead ends: 46508 [2021-11-21 00:14:14,764 INFO L226 Difference]: Without dead ends: 26196 [2021-11-21 00:14:14,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:14:14,908 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 486 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:14,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1324 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:14:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26196 states. [2021-11-21 00:14:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26196 to 25854. [2021-11-21 00:14:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25854 states, 19580 states have (on average 1.4786006128702758) internal successors, (28951), 20110 states have internal predecessors, (28951), 4461 states have call successors, (4461), 1347 states have call predecessors, (4461), 1812 states have return successors, (9194), 4636 states have call predecessors, (9194), 4443 states have call successors, (9194) [2021-11-21 00:14:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25854 states to 25854 states and 42606 transitions. [2021-11-21 00:14:16,988 INFO L78 Accepts]: Start accepts. Automaton has 25854 states and 42606 transitions. Word has length 145 [2021-11-21 00:14:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:16,988 INFO L470 AbstractCegarLoop]: Abstraction has 25854 states and 42606 transitions. [2021-11-21 00:14:16,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 00:14:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25854 states and 42606 transitions. [2021-11-21 00:14:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-21 00:14:17,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:17,013 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:17,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:17,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:14:17,229 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:17,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2056046344, now seen corresponding path program 1 times [2021-11-21 00:14:17,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:17,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310902842] [2021-11-21 00:14:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:17,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 00:14:17,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310902842] [2021-11-21 00:14:17,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310902842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589464984] [2021-11-21 00:14:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:17,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:17,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:17,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5b783f-12da-46ac-8871-a68ec5cddb45/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:14:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:14:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:14:18,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 00:14:19,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589464984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:19,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007439980] [2021-11-21 00:14:19,348 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2021-11-21 00:14:19,348 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:14:19,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:14:19,364 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:14:19,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:15:20,328 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-21 00:19:09,473 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 488 for LOIs [2021-11-21 00:19:25,768 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2021-11-21 00:20:15,694 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2021-11-21 00:20:25,874 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2021-11-21 00:20:32,087 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 448 for LOIs [2021-11-21 00:20:39,537 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2021-11-21 00:22:32,303 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 594 for LOIs [2021-11-21 00:22:40,189 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-21 00:22:45,287 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:07,081 WARN L227 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:23:49,874 WARN L227 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 488 DAG size of output: 453 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)