./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8 --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 bf9b303f0455860ff73b360d674f9b56750c61e03c2589dbf0115b0e5bdacb76 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:01:45,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:01:45,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:01:45,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:01:45,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:01:45,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:01:45,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:01:45,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:01:45,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:01:45,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:01:45,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:01:45,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:01:45,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:01:45,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:01:45,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:01:45,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:01:45,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:01:45,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:01:45,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:01:45,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:01:45,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:01:45,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:01:45,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:01:45,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:01:45,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:01:45,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:01:45,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:01:45,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:01:45,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:01:45,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:01:45,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:01:45,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:01:45,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:01:45,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:01:45,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:01:45,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:01:45,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:01:45,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:01:45,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:01:45,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:01:45,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:01:45,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:01:45,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:01:45,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:01:45,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:01:45,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:01:45,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:01:45,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:01:45,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:01:45,526 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:01:45,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:01:45,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:01:45,526 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:01:45,526 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:01:45,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:01:45,527 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:01:45,527 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:01:45,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:01:45,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:01:45,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:01:45,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:01:45,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:01:45,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:01:45,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:01:45,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:01:45,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:01:45,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:01:45,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:01:45,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:01:45,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:01:45,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:01:45,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:01:45,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:45,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:01:45,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:01:45,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:01:45,532 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:01:45,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:01:45,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:01:45,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:01:45,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:01:45,533 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_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf9b303f0455860ff73b360d674f9b56750c61e03c2589dbf0115b0e5bdacb76 [2021-11-07 02:01:45,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:01:45,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:01:45,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:01:45,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:01:45,844 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:01:45,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-07 02:01:45,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/data/7c7114d59/631d5f8ea04046cdbb449e1f24500c44/FLAGd06e87007 [2021-11-07 02:01:46,476 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:01:46,477 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-07 02:01:46,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/data/7c7114d59/631d5f8ea04046cdbb449e1f24500c44/FLAGd06e87007 [2021-11-07 02:01:46,798 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/data/7c7114d59/631d5f8ea04046cdbb449e1f24500c44 [2021-11-07 02:01:46,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:01:46,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:01:46,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:46,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:01:46,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:01:46,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:46" (1/1) ... [2021-11-07 02:01:46,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc82b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:46, skipping insertion in model container [2021-11-07 02:01:46,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:46" (1/1) ... [2021-11-07 02:01:46,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:01:46,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:47,236 WARN L228 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_704d9871-376f-4292-8b77-a3ce2814295a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[11904,11917] [2021-11-07 02:01:47,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:47,329 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:01:47,416 WARN L228 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_704d9871-376f-4292-8b77-a3ce2814295a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[11904,11917] [2021-11-07 02:01:47,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:47,491 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:01:47,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47 WrapperNode [2021-11-07 02:01:47,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:47,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:01:47,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:01:47,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:01:47,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:01:47,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:01:47,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:01:47,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:01:47,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:01:47,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:01:47,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:01:47,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:01:47,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (1/1) ... [2021-11-07 02:01:47,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:01:47,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:01:47,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:01:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:01:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:01:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:01:47,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:01:50,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:01:50,777 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:01:50,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:50 BoogieIcfgContainer [2021-11-07 02:01:50,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:01:50,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:01:50,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:01:50,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:01:50,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:01:46" (1/3) ... [2021-11-07 02:01:50,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11aa550b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:50, skipping insertion in model container [2021-11-07 02:01:50,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:47" (2/3) ... [2021-11-07 02:01:50,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11aa550b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:50, skipping insertion in model container [2021-11-07 02:01:50,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:50" (3/3) ... [2021-11-07 02:01:50,789 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-07 02:01:50,794 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:01:50,794 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:01:50,842 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:01:50,848 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 [2021-11-07 02:01:50,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:01:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.5298507462686568) internal successors, (205), 135 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:01:50,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:50,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:50,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1769221222, now seen corresponding path program 1 times [2021-11-07 02:01:50,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:50,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923237269] [2021-11-07 02:01:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:50,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:51,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:51,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923237269] [2021-11-07 02:01:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923237269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:51,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:51,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:51,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566892136] [2021-11-07 02:01:51,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:51,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:51,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:51,598 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.5298507462686568) internal successors, (205), 135 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:51,685 INFO L93 Difference]: Finished difference Result 349 states and 523 transitions. [2021-11-07 02:01:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:01:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:51,699 INFO L225 Difference]: With dead ends: 349 [2021-11-07 02:01:51,699 INFO L226 Difference]: Without dead ends: 260 [2021-11-07 02:01:51,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-07 02:01:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 250. [2021-11-07 02:01:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.4779116465863453) internal successors, (368), 249 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 368 transitions. [2021-11-07 02:01:51,867 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 368 transitions. Word has length 52 [2021-11-07 02:01:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:51,868 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 368 transitions. [2021-11-07 02:01:51,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 368 transitions. [2021-11-07 02:01:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:01:51,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:51,873 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:51,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:01:51,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash -192028889, now seen corresponding path program 1 times [2021-11-07 02:01:51,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:51,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643488386] [2021-11-07 02:01:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:51,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:52,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:52,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643488386] [2021-11-07 02:01:52,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643488386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:52,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:52,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:52,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085407264] [2021-11-07 02:01:52,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:52,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,164 INFO L87 Difference]: Start difference. First operand 250 states and 368 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:52,255 INFO L93 Difference]: Finished difference Result 628 states and 925 transitions. [2021-11-07 02:01:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:01:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:52,261 INFO L225 Difference]: With dead ends: 628 [2021-11-07 02:01:52,267 INFO L226 Difference]: Without dead ends: 480 [2021-11-07 02:01:52,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-07 02:01:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 462. [2021-11-07 02:01:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.470715835140998) internal successors, (678), 461 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 678 transitions. [2021-11-07 02:01:52,360 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 678 transitions. Word has length 55 [2021-11-07 02:01:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:52,361 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 678 transitions. [2021-11-07 02:01:52,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 678 transitions. [2021-11-07 02:01:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:01:52,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:52,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:52,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:01:52,374 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash 113703676, now seen corresponding path program 1 times [2021-11-07 02:01:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:52,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430022156] [2021-11-07 02:01:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:52,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:52,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:52,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430022156] [2021-11-07 02:01:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430022156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:52,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:52,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:52,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976945621] [2021-11-07 02:01:52,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:52,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:52,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,526 INFO L87 Difference]: Start difference. First operand 462 states and 678 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:52,628 INFO L93 Difference]: Finished difference Result 1142 states and 1676 transitions. [2021-11-07 02:01:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:52,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:01:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:52,639 INFO L225 Difference]: With dead ends: 1142 [2021-11-07 02:01:52,639 INFO L226 Difference]: Without dead ends: 880 [2021-11-07 02:01:52,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-07 02:01:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 846. [2021-11-07 02:01:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4603550295857988) internal successors, (1234), 845 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1234 transitions. [2021-11-07 02:01:52,708 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1234 transitions. Word has length 58 [2021-11-07 02:01:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1234 transitions. [2021-11-07 02:01:52,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1234 transitions. [2021-11-07 02:01:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:01:52,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:52,713 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:52,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:01:52,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1889334862, now seen corresponding path program 1 times [2021-11-07 02:01:52,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:52,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775648092] [2021-11-07 02:01:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:52,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:52,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:52,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775648092] [2021-11-07 02:01:52,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775648092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:52,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:52,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:52,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429184233] [2021-11-07 02:01:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:52,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,867 INFO L87 Difference]: Start difference. First operand 846 states and 1234 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:52,970 INFO L93 Difference]: Finished difference Result 2058 states and 3000 transitions. [2021-11-07 02:01:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:01:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:52,982 INFO L225 Difference]: With dead ends: 2058 [2021-11-07 02:01:52,983 INFO L226 Difference]: Without dead ends: 1600 [2021-11-07 02:01:52,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-11-07 02:01:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1534. [2021-11-07 02:01:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 1.446836268754077) internal successors, (2218), 1533 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2218 transitions. [2021-11-07 02:01:53,087 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2218 transitions. Word has length 61 [2021-11-07 02:01:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:53,088 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 2218 transitions. [2021-11-07 02:01:53,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2218 transitions. [2021-11-07 02:01:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:01:53,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:53,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:53,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:01:53,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:53,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1959742809, now seen corresponding path program 1 times [2021-11-07 02:01:53,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:53,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864270618] [2021-11-07 02:01:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:53,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:53,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:53,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864270618] [2021-11-07 02:01:53,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864270618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:53,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:53,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:53,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994468817] [2021-11-07 02:01:53,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:53,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,256 INFO L87 Difference]: Start difference. First operand 1534 states and 2218 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:53,408 INFO L93 Difference]: Finished difference Result 3666 states and 5292 transitions. [2021-11-07 02:01:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:53,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:01:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:53,428 INFO L225 Difference]: With dead ends: 3666 [2021-11-07 02:01:53,429 INFO L226 Difference]: Without dead ends: 2880 [2021-11-07 02:01:53,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-11-07 02:01:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2750. [2021-11-07 02:01:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.429610767551837) internal successors, (3930), 2749 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 3930 transitions. [2021-11-07 02:01:53,608 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 3930 transitions. Word has length 64 [2021-11-07 02:01:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:53,609 INFO L470 AbstractCegarLoop]: Abstraction has 2750 states and 3930 transitions. [2021-11-07 02:01:53,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 3930 transitions. [2021-11-07 02:01:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:01:53,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:53,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:53,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:01:53,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1142125892, now seen corresponding path program 1 times [2021-11-07 02:01:53,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:53,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554279871] [2021-11-07 02:01:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:53,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:53,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:53,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554279871] [2021-11-07 02:01:53,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554279871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:53,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:53,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:53,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612551313] [2021-11-07 02:01:53,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:53,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:53,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,701 INFO L87 Difference]: Start difference. First operand 2750 states and 3930 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:53,944 INFO L93 Difference]: Finished difference Result 6434 states and 9164 transitions. [2021-11-07 02:01:53,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:01:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:53,977 INFO L225 Difference]: With dead ends: 6434 [2021-11-07 02:01:53,978 INFO L226 Difference]: Without dead ends: 5120 [2021-11-07 02:01:53,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:53,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5120 states. [2021-11-07 02:01:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5120 to 4862. [2021-11-07 02:01:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4862 states, 4861 states have (on average 1.4075293149557704) internal successors, (6842), 4861 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 6842 transitions. [2021-11-07 02:01:54,305 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 6842 transitions. Word has length 67 [2021-11-07 02:01:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:54,305 INFO L470 AbstractCegarLoop]: Abstraction has 4862 states and 6842 transitions. [2021-11-07 02:01:54,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 6842 transitions. [2021-11-07 02:01:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:01:54,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:54,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:54,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:01:54,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2007445622, now seen corresponding path program 1 times [2021-11-07 02:01:54,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:54,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501428283] [2021-11-07 02:01:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:54,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:54,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:54,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501428283] [2021-11-07 02:01:54,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501428283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:54,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:01:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015083607] [2021-11-07 02:01:54,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:54,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:54,563 INFO L87 Difference]: Start difference. First operand 4862 states and 6842 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:54,856 INFO L93 Difference]: Finished difference Result 9024 states and 12603 transitions. [2021-11-07 02:01:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:01:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:54,885 INFO L225 Difference]: With dead ends: 9024 [2021-11-07 02:01:54,885 INFO L226 Difference]: Without dead ends: 4862 [2021-11-07 02:01:54,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:01:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-11-07 02:01:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4862. [2021-11-07 02:01:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4862 states, 4861 states have (on average 1.3811972845093603) internal successors, (6714), 4861 states have internal predecessors, (6714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 6714 transitions. [2021-11-07 02:01:55,202 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 6714 transitions. Word has length 70 [2021-11-07 02:01:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:55,203 INFO L470 AbstractCegarLoop]: Abstraction has 4862 states and 6714 transitions. [2021-11-07 02:01:55,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 6714 transitions. [2021-11-07 02:01:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:01:55,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:55,216 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:55,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:01:55,218 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1344223677, now seen corresponding path program 1 times [2021-11-07 02:01:55,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:55,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585112509] [2021-11-07 02:01:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:55,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:55,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:55,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585112509] [2021-11-07 02:01:55,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585112509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:55,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:55,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:55,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437331809] [2021-11-07 02:01:55,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:55,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:55,315 INFO L87 Difference]: Start difference. First operand 4862 states and 6714 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:55,655 INFO L93 Difference]: Finished difference Result 7740 states and 10676 transitions. [2021-11-07 02:01:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:01:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:55,688 INFO L225 Difference]: With dead ends: 7740 [2021-11-07 02:01:55,688 INFO L226 Difference]: Without dead ends: 5688 [2021-11-07 02:01:55,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2021-11-07 02:01:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 5686. [2021-11-07 02:01:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 1.3702726473175022) internal successors, (7790), 5685 states have internal predecessors, (7790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 7790 transitions. [2021-11-07 02:01:56,013 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 7790 transitions. Word has length 72 [2021-11-07 02:01:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:56,015 INFO L470 AbstractCegarLoop]: Abstraction has 5686 states and 7790 transitions. [2021-11-07 02:01:56,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 7790 transitions. [2021-11-07 02:01:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:01:56,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:56,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:56,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:01:56,034 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1921271962, now seen corresponding path program 1 times [2021-11-07 02:01:56,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:56,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716418948] [2021-11-07 02:01:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:56,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:56,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:56,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716418948] [2021-11-07 02:01:56,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716418948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:56,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:56,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:56,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361668400] [2021-11-07 02:01:56,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:56,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:56,372 INFO L87 Difference]: Start difference. First operand 5686 states and 7790 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:56,732 INFO L93 Difference]: Finished difference Result 9490 states and 13076 transitions. [2021-11-07 02:01:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:01:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:56,787 INFO L225 Difference]: With dead ends: 9490 [2021-11-07 02:01:56,788 INFO L226 Difference]: Without dead ends: 5214 [2021-11-07 02:01:56,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-11-07 02:01:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5212. [2021-11-07 02:01:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 5211 states have (on average 1.3797735559393591) internal successors, (7190), 5211 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 7190 transitions. [2021-11-07 02:01:57,192 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 7190 transitions. Word has length 74 [2021-11-07 02:01:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:57,192 INFO L470 AbstractCegarLoop]: Abstraction has 5212 states and 7190 transitions. [2021-11-07 02:01:57,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 7190 transitions. [2021-11-07 02:01:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:01:57,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:57,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:57,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:01:57,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -26025977, now seen corresponding path program 1 times [2021-11-07 02:01:57,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:57,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948744368] [2021-11-07 02:01:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:57,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:57,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:57,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948744368] [2021-11-07 02:01:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948744368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:57,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:57,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:01:57,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635029187] [2021-11-07 02:01:57,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:57,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:57,376 INFO L87 Difference]: Start difference. First operand 5212 states and 7190 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:58,435 INFO L93 Difference]: Finished difference Result 9783 states and 13502 transitions. [2021-11-07 02:01:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:01:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:01:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:58,448 INFO L225 Difference]: With dead ends: 9783 [2021-11-07 02:01:58,448 INFO L226 Difference]: Without dead ends: 5517 [2021-11-07 02:01:58,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:01:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5517 states. [2021-11-07 02:01:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5517 to 5346. [2021-11-07 02:01:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5346 states, 5345 states have (on average 1.3638914873713752) internal successors, (7290), 5345 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5346 states to 5346 states and 7290 transitions. [2021-11-07 02:01:58,858 INFO L78 Accepts]: Start accepts. Automaton has 5346 states and 7290 transitions. Word has length 75 [2021-11-07 02:01:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:58,862 INFO L470 AbstractCegarLoop]: Abstraction has 5346 states and 7290 transitions. [2021-11-07 02:01:58,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5346 states and 7290 transitions. [2021-11-07 02:01:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:01:58,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:58,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:58,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 02:01:58,874 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash 552788273, now seen corresponding path program 1 times [2021-11-07 02:01:58,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:58,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565386740] [2021-11-07 02:01:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:58,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:58,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:58,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565386740] [2021-11-07 02:01:58,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565386740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:58,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:58,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:58,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902700661] [2021-11-07 02:01:58,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:58,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:58,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:58,933 INFO L87 Difference]: Start difference. First operand 5346 states and 7290 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:59,954 INFO L93 Difference]: Finished difference Result 14456 states and 19662 transitions. [2021-11-07 02:01:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:01:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:59,982 INFO L225 Difference]: With dead ends: 14456 [2021-11-07 02:01:59,982 INFO L226 Difference]: Without dead ends: 10590 [2021-11-07 02:01:59,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10590 states. [2021-11-07 02:02:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10590 to 10588. [2021-11-07 02:02:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10588 states, 10587 states have (on average 1.3491073958628506) internal successors, (14283), 10587 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10588 states to 10588 states and 14283 transitions. [2021-11-07 02:02:00,899 INFO L78 Accepts]: Start accepts. Automaton has 10588 states and 14283 transitions. Word has length 77 [2021-11-07 02:02:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:00,899 INFO L470 AbstractCegarLoop]: Abstraction has 10588 states and 14283 transitions. [2021-11-07 02:02:00,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10588 states and 14283 transitions. [2021-11-07 02:02:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:02:00,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:00,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:00,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 02:02:00,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1822323562, now seen corresponding path program 1 times [2021-11-07 02:02:00,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:00,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252940624] [2021-11-07 02:02:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:00,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:00,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:00,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252940624] [2021-11-07 02:02:00,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252940624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:00,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:00,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:00,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102297753] [2021-11-07 02:02:00,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:00,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:00,995 INFO L87 Difference]: Start difference. First operand 10588 states and 14283 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:01,529 INFO L93 Difference]: Finished difference Result 16276 states and 22037 transitions. [2021-11-07 02:02:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:02:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:01,550 INFO L225 Difference]: With dead ends: 16276 [2021-11-07 02:02:01,551 INFO L226 Difference]: Without dead ends: 8514 [2021-11-07 02:02:01,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8514 states. [2021-11-07 02:02:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8514 to 8352. [2021-11-07 02:02:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8352 states, 8351 states have (on average 1.3316968027781104) internal successors, (11121), 8351 states have internal predecessors, (11121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8352 states to 8352 states and 11121 transitions. [2021-11-07 02:02:02,193 INFO L78 Accepts]: Start accepts. Automaton has 8352 states and 11121 transitions. Word has length 77 [2021-11-07 02:02:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:02,194 INFO L470 AbstractCegarLoop]: Abstraction has 8352 states and 11121 transitions. [2021-11-07 02:02:02,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8352 states and 11121 transitions. [2021-11-07 02:02:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:02:02,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:02,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:02,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 02:02:02,207 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1632055562, now seen corresponding path program 1 times [2021-11-07 02:02:02,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:02,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019884293] [2021-11-07 02:02:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:02,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:02,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:02,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019884293] [2021-11-07 02:02:02,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019884293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:02,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:02,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:02,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703044388] [2021-11-07 02:02:02,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:02,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:02,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:02,395 INFO L87 Difference]: Start difference. First operand 8352 states and 11121 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:02,949 INFO L93 Difference]: Finished difference Result 16066 states and 21384 transitions. [2021-11-07 02:02:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:02,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:02:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:02,968 INFO L225 Difference]: With dead ends: 16066 [2021-11-07 02:02:02,969 INFO L226 Difference]: Without dead ends: 8352 [2021-11-07 02:02:02,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-11-07 02:02:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 8352. [2021-11-07 02:02:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8352 states, 8351 states have (on average 1.3240330499341397) internal successors, (11057), 8351 states have internal predecessors, (11057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8352 states to 8352 states and 11057 transitions. [2021-11-07 02:02:03,437 INFO L78 Accepts]: Start accepts. Automaton has 8352 states and 11057 transitions. Word has length 77 [2021-11-07 02:02:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:03,437 INFO L470 AbstractCegarLoop]: Abstraction has 8352 states and 11057 transitions. [2021-11-07 02:02:03,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8352 states and 11057 transitions. [2021-11-07 02:02:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:02:03,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:03,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:03,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 02:02:03,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2004485505, now seen corresponding path program 1 times [2021-11-07 02:02:03,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:03,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096596382] [2021-11-07 02:02:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:03,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:03,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:03,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096596382] [2021-11-07 02:02:03,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096596382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:03,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:03,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 02:02:03,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848420682] [2021-11-07 02:02:03,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:02:03,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:02:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:03,661 INFO L87 Difference]: Start difference. First operand 8352 states and 11057 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:05,327 INFO L93 Difference]: Finished difference Result 16253 states and 21413 transitions. [2021-11-07 02:02:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:02:05,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 02:02:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:05,355 INFO L225 Difference]: With dead ends: 16253 [2021-11-07 02:02:05,355 INFO L226 Difference]: Without dead ends: 10461 [2021-11-07 02:02:05,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:02:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10461 states. [2021-11-07 02:02:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10461 to 8761. [2021-11-07 02:02:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8761 states, 8760 states have (on average 1.3123287671232877) internal successors, (11496), 8760 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 11496 transitions. [2021-11-07 02:02:05,973 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 11496 transitions. Word has length 78 [2021-11-07 02:02:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:05,974 INFO L470 AbstractCegarLoop]: Abstraction has 8761 states and 11496 transitions. [2021-11-07 02:02:05,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 11496 transitions. [2021-11-07 02:02:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:02:05,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:05,985 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:05,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 02:02:05,986 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash -452821296, now seen corresponding path program 1 times [2021-11-07 02:02:05,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:05,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634504437] [2021-11-07 02:02:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:05,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:06,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:06,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634504437] [2021-11-07 02:02:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634504437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:06,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:06,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:02:06,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660159139] [2021-11-07 02:02:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:06,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:06,195 INFO L87 Difference]: Start difference. First operand 8761 states and 11496 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:06,801 INFO L93 Difference]: Finished difference Result 15702 states and 20775 transitions. [2021-11-07 02:02:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 02:02:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:06,820 INFO L225 Difference]: With dead ends: 15702 [2021-11-07 02:02:06,821 INFO L226 Difference]: Without dead ends: 8231 [2021-11-07 02:02:06,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2021-11-07 02:02:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 8229. [2021-11-07 02:02:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.32328633932912) internal successors, (10888), 8228 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 10888 transitions. [2021-11-07 02:02:07,296 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 10888 transitions. Word has length 79 [2021-11-07 02:02:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 10888 transitions. [2021-11-07 02:02:07,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 10888 transitions. [2021-11-07 02:02:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:02:07,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:07,305 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:07,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 02:02:07,305 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1378813936, now seen corresponding path program 1 times [2021-11-07 02:02:07,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:07,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202919730] [2021-11-07 02:02:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:07,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:07,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:07,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202919730] [2021-11-07 02:02:07,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202919730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:07,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:07,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:02:07,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153645137] [2021-11-07 02:02:07,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:07,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:07,486 INFO L87 Difference]: Start difference. First operand 8229 states and 10888 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:08,098 INFO L93 Difference]: Finished difference Result 17140 states and 22693 transitions. [2021-11-07 02:02:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 02:02:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:08,125 INFO L225 Difference]: With dead ends: 17140 [2021-11-07 02:02:08,125 INFO L226 Difference]: Without dead ends: 10887 [2021-11-07 02:02:08,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-11-07 02:02:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 10103. [2021-11-07 02:02:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10103 states, 10102 states have (on average 1.3136012670758266) internal successors, (13270), 10102 states have internal predecessors, (13270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 13270 transitions. [2021-11-07 02:02:08,690 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 13270 transitions. Word has length 81 [2021-11-07 02:02:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 10103 states and 13270 transitions. [2021-11-07 02:02:08,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 13270 transitions. [2021-11-07 02:02:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:02:08,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:08,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:08,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 02:02:08,700 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash -983513345, now seen corresponding path program 1 times [2021-11-07 02:02:08,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:08,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093891982] [2021-11-07 02:02:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:08,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:08,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:08,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093891982] [2021-11-07 02:02:08,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093891982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:08,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:08,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:08,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978998642] [2021-11-07 02:02:08,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:08,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:08,757 INFO L87 Difference]: Start difference. First operand 10103 states and 13270 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:09,767 INFO L93 Difference]: Finished difference Result 24407 states and 32204 transitions. [2021-11-07 02:02:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:02:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:09,809 INFO L225 Difference]: With dead ends: 24407 [2021-11-07 02:02:09,809 INFO L226 Difference]: Without dead ends: 15898 [2021-11-07 02:02:09,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-11-07 02:02:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 15896. [2021-11-07 02:02:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15896 states, 15895 states have (on average 1.3013526266121422) internal successors, (20685), 15895 states have internal predecessors, (20685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15896 states to 15896 states and 20685 transitions. [2021-11-07 02:02:10,791 INFO L78 Accepts]: Start accepts. Automaton has 15896 states and 20685 transitions. Word has length 82 [2021-11-07 02:02:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:10,792 INFO L470 AbstractCegarLoop]: Abstraction has 15896 states and 20685 transitions. [2021-11-07 02:02:10,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 15896 states and 20685 transitions. [2021-11-07 02:02:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:02:10,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:10,805 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:10,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 02:02:10,806 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1448407812, now seen corresponding path program 1 times [2021-11-07 02:02:10,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:10,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541333776] [2021-11-07 02:02:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:10,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:10,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:10,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541333776] [2021-11-07 02:02:10,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541333776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:10,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:10,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:10,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510500771] [2021-11-07 02:02:10,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:10,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:10,889 INFO L87 Difference]: Start difference. First operand 15896 states and 20685 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:11,840 INFO L93 Difference]: Finished difference Result 21796 states and 28563 transitions. [2021-11-07 02:02:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:02:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:11,860 INFO L225 Difference]: With dead ends: 21796 [2021-11-07 02:02:11,860 INFO L226 Difference]: Without dead ends: 7998 [2021-11-07 02:02:11,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-11-07 02:02:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 5040. [2021-11-07 02:02:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5039 states have (on average 1.2933121651121253) internal successors, (6517), 5039 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 6517 transitions. [2021-11-07 02:02:12,490 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 6517 transitions. Word has length 82 [2021-11-07 02:02:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:12,490 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 6517 transitions. [2021-11-07 02:02:12,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 6517 transitions. [2021-11-07 02:02:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:02:12,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:12,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:12,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 02:02:12,496 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1070631511, now seen corresponding path program 1 times [2021-11-07 02:02:12,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:12,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34457033] [2021-11-07 02:02:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:12,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:12,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:12,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34457033] [2021-11-07 02:02:12,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34457033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:12,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:12,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 02:02:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141449935] [2021-11-07 02:02:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:12,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:12,700 INFO L87 Difference]: Start difference. First operand 5040 states and 6517 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:13,230 INFO L93 Difference]: Finished difference Result 8928 states and 11673 transitions. [2021-11-07 02:02:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:02:13,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:02:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:13,241 INFO L225 Difference]: With dead ends: 8928 [2021-11-07 02:02:13,241 INFO L226 Difference]: Without dead ends: 4750 [2021-11-07 02:02:13,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2021-11-07 02:02:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 4748. [2021-11-07 02:02:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 1.3037708026121761) internal successors, (6189), 4747 states have internal predecessors, (6189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 6189 transitions. [2021-11-07 02:02:13,678 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 6189 transitions. Word has length 82 [2021-11-07 02:02:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:13,678 INFO L470 AbstractCegarLoop]: Abstraction has 4748 states and 6189 transitions. [2021-11-07 02:02:13,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 6189 transitions. [2021-11-07 02:02:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:02:13,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:13,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:13,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 02:02:13,681 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1920799612, now seen corresponding path program 1 times [2021-11-07 02:02:13,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:13,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310805868] [2021-11-07 02:02:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:13,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:13,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:13,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310805868] [2021-11-07 02:02:13,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310805868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:13,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:13,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:02:13,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589166472] [2021-11-07 02:02:13,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:02:13,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:13,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:02:13,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:13,898 INFO L87 Difference]: Start difference. First operand 4748 states and 6189 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:14,439 INFO L93 Difference]: Finished difference Result 8508 states and 11169 transitions. [2021-11-07 02:02:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:02:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:02:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:14,447 INFO L225 Difference]: With dead ends: 8508 [2021-11-07 02:02:14,447 INFO L226 Difference]: Without dead ends: 4546 [2021-11-07 02:02:14,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-11-07 02:02:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4544. [2021-11-07 02:02:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.3086066475896985) internal successors, (5945), 4543 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 5945 transitions. [2021-11-07 02:02:14,881 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 5945 transitions. Word has length 85 [2021-11-07 02:02:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:14,881 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 5945 transitions. [2021-11-07 02:02:14,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 5945 transitions. [2021-11-07 02:02:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:02:14,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:14,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:14,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 02:02:14,884 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash -359536648, now seen corresponding path program 1 times [2021-11-07 02:02:14,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:14,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857280319] [2021-11-07 02:02:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:14,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:15,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:15,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857280319] [2021-11-07 02:02:15,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857280319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:15,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:15,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:02:15,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111236773] [2021-11-07 02:02:15,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:15,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:15,042 INFO L87 Difference]: Start difference. First operand 4544 states and 5945 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:15,573 INFO L93 Difference]: Finished difference Result 9072 states and 11867 transitions. [2021-11-07 02:02:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 02:02:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:15,578 INFO L225 Difference]: With dead ends: 9072 [2021-11-07 02:02:15,579 INFO L226 Difference]: Without dead ends: 4546 [2021-11-07 02:02:15,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-11-07 02:02:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4544. [2021-11-07 02:02:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.308166409861325) internal successors, (5943), 4543 states have internal predecessors, (5943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 5943 transitions. [2021-11-07 02:02:15,921 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 5943 transitions. Word has length 88 [2021-11-07 02:02:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:15,921 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 5943 transitions. [2021-11-07 02:02:15,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 5943 transitions. [2021-11-07 02:02:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:02:15,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:15,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:15,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 02:02:15,924 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash 97011059, now seen corresponding path program 1 times [2021-11-07 02:02:15,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:15,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300030249] [2021-11-07 02:02:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:15,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:16,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:16,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300030249] [2021-11-07 02:02:16,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300030249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:16,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:16,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:02:16,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626679760] [2021-11-07 02:02:16,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:16,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:16,085 INFO L87 Difference]: Start difference. First operand 4544 states and 5943 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:16,685 INFO L93 Difference]: Finished difference Result 8108 states and 10654 transitions. [2021-11-07 02:02:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 02:02:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:16,692 INFO L225 Difference]: With dead ends: 8108 [2021-11-07 02:02:16,693 INFO L226 Difference]: Without dead ends: 4694 [2021-11-07 02:02:16,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2021-11-07 02:02:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4544. [2021-11-07 02:02:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4544 states, 4543 states have (on average 1.2870349988994056) internal successors, (5847), 4543 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4544 states to 4544 states and 5847 transitions. [2021-11-07 02:02:17,043 INFO L78 Accepts]: Start accepts. Automaton has 4544 states and 5847 transitions. Word has length 88 [2021-11-07 02:02:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:17,044 INFO L470 AbstractCegarLoop]: Abstraction has 4544 states and 5847 transitions. [2021-11-07 02:02:17,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4544 states and 5847 transitions. [2021-11-07 02:02:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:02:17,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:17,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:17,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 02:02:17,046 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -227311720, now seen corresponding path program 1 times [2021-11-07 02:02:17,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:17,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344393115] [2021-11-07 02:02:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:17,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:17,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:17,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344393115] [2021-11-07 02:02:17,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344393115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:17,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:17,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 02:02:17,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552940758] [2021-11-07 02:02:17,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:02:17,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:02:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:17,274 INFO L87 Difference]: Start difference. First operand 4544 states and 5847 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:17,925 INFO L93 Difference]: Finished difference Result 8176 states and 10571 transitions. [2021-11-07 02:02:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:02:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 02:02:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:17,929 INFO L225 Difference]: With dead ends: 8176 [2021-11-07 02:02:17,930 INFO L226 Difference]: Without dead ends: 4386 [2021-11-07 02:02:17,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-07 02:02:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4384. [2021-11-07 02:02:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 1.2879306411133926) internal successors, (5645), 4383 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 5645 transitions. [2021-11-07 02:02:18,284 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 5645 transitions. Word has length 88 [2021-11-07 02:02:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:18,284 INFO L470 AbstractCegarLoop]: Abstraction has 4384 states and 5645 transitions. [2021-11-07 02:02:18,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 5645 transitions. [2021-11-07 02:02:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:18,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:18,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:18,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 02:02:18,288 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1832645223, now seen corresponding path program 1 times [2021-11-07 02:02:18,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:18,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910008488] [2021-11-07 02:02:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:18,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:18,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:18,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910008488] [2021-11-07 02:02:18,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910008488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:18,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:18,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:18,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197961079] [2021-11-07 02:02:18,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:18,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:18,360 INFO L87 Difference]: Start difference. First operand 4384 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:19,295 INFO L93 Difference]: Finished difference Result 12244 states and 15743 transitions. [2021-11-07 02:02:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:19,310 INFO L225 Difference]: With dead ends: 12244 [2021-11-07 02:02:19,310 INFO L226 Difference]: Without dead ends: 8646 [2021-11-07 02:02:19,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-11-07 02:02:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8644. [2021-11-07 02:02:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 1.2744417447645493) internal successors, (11015), 8643 states have internal predecessors, (11015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 11015 transitions. [2021-11-07 02:02:20,097 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 11015 transitions. Word has length 91 [2021-11-07 02:02:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:20,097 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 11015 transitions. [2021-11-07 02:02:20,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 11015 transitions. [2021-11-07 02:02:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:20,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:20,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:20,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 02:02:20,102 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 919150242, now seen corresponding path program 1 times [2021-11-07 02:02:20,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:20,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355980633] [2021-11-07 02:02:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:20,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:20,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:20,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355980633] [2021-11-07 02:02:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355980633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:20,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:20,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:20,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714954935] [2021-11-07 02:02:20,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:20,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:20,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:20,174 INFO L87 Difference]: Start difference. First operand 8644 states and 11015 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:20,743 INFO L93 Difference]: Finished difference Result 11740 states and 15025 transitions. [2021-11-07 02:02:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:20,750 INFO L225 Difference]: With dead ends: 11740 [2021-11-07 02:02:20,750 INFO L226 Difference]: Without dead ends: 4550 [2021-11-07 02:02:20,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2021-11-07 02:02:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 4548. [2021-11-07 02:02:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 1.2577523641961732) internal successors, (5719), 4547 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 5719 transitions. [2021-11-07 02:02:21,153 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 5719 transitions. Word has length 91 [2021-11-07 02:02:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:21,153 INFO L470 AbstractCegarLoop]: Abstraction has 4548 states and 5719 transitions. [2021-11-07 02:02:21,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 5719 transitions. [2021-11-07 02:02:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:21,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:21,155 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:21,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 02:02:21,156 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash 786910420, now seen corresponding path program 1 times [2021-11-07 02:02:21,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:21,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118105631] [2021-11-07 02:02:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:21,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:21,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:21,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118105631] [2021-11-07 02:02:21,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118105631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:21,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:21,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:02:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197262433] [2021-11-07 02:02:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:21,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:21,282 INFO L87 Difference]: Start difference. First operand 4548 states and 5719 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:22,221 INFO L93 Difference]: Finished difference Result 9134 states and 11511 transitions. [2021-11-07 02:02:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:02:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:22,228 INFO L225 Difference]: With dead ends: 9134 [2021-11-07 02:02:22,229 INFO L226 Difference]: Without dead ends: 5500 [2021-11-07 02:02:22,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2021-11-07 02:02:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 4890. [2021-11-07 02:02:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 1.2495397831867459) internal successors, (6109), 4889 states have internal predecessors, (6109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 6109 transitions. [2021-11-07 02:02:22,866 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 6109 transitions. Word has length 91 [2021-11-07 02:02:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:22,866 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 6109 transitions. [2021-11-07 02:02:22,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 6109 transitions. [2021-11-07 02:02:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:22,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:22,870 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:22,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 02:02:22,870 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1316907991, now seen corresponding path program 1 times [2021-11-07 02:02:22,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:22,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785678684] [2021-11-07 02:02:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:22,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:22,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:22,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785678684] [2021-11-07 02:02:22,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785678684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:22,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:22,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:22,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735344290] [2021-11-07 02:02:22,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:22,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:22,936 INFO L87 Difference]: Start difference. First operand 4890 states and 6109 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:23,906 INFO L93 Difference]: Finished difference Result 11672 states and 14623 transitions. [2021-11-07 02:02:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:23,917 INFO L225 Difference]: With dead ends: 11672 [2021-11-07 02:02:23,917 INFO L226 Difference]: Without dead ends: 7554 [2021-11-07 02:02:23,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7554 states. [2021-11-07 02:02:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7554 to 7552. [2021-11-07 02:02:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7552 states, 7551 states have (on average 1.2394384849688782) internal successors, (9359), 7551 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7552 states to 7552 states and 9359 transitions. [2021-11-07 02:02:24,624 INFO L78 Accepts]: Start accepts. Automaton has 7552 states and 9359 transitions. Word has length 91 [2021-11-07 02:02:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:24,624 INFO L470 AbstractCegarLoop]: Abstraction has 7552 states and 9359 transitions. [2021-11-07 02:02:24,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7552 states and 9359 transitions. [2021-11-07 02:02:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:24,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:24,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:24,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 02:02:24,628 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash 378440366, now seen corresponding path program 1 times [2021-11-07 02:02:24,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:24,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439781446] [2021-11-07 02:02:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:24,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:24,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:24,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439781446] [2021-11-07 02:02:24,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439781446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:24,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:24,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:24,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042616118] [2021-11-07 02:02:24,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:24,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:24,688 INFO L87 Difference]: Start difference. First operand 7552 states and 9359 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:25,143 INFO L93 Difference]: Finished difference Result 10280 states and 12773 transitions. [2021-11-07 02:02:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:25,148 INFO L225 Difference]: With dead ends: 10280 [2021-11-07 02:02:25,148 INFO L226 Difference]: Without dead ends: 3694 [2021-11-07 02:02:25,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2021-11-07 02:02:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 2654. [2021-11-07 02:02:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.230682246513381) internal successors, (3265), 2653 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3265 transitions. [2021-11-07 02:02:25,403 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3265 transitions. Word has length 91 [2021-11-07 02:02:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:25,403 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 3265 transitions. [2021-11-07 02:02:25,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3265 transitions. [2021-11-07 02:02:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:25,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:25,405 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:25,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 02:02:25,405 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:25,405 INFO L85 PathProgramCache]: Analyzing trace with hash 884161929, now seen corresponding path program 1 times [2021-11-07 02:02:25,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:25,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804019552] [2021-11-07 02:02:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:25,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:25,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:25,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804019552] [2021-11-07 02:02:25,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804019552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:25,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:25,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:25,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359067844] [2021-11-07 02:02:25,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:25,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:25,457 INFO L87 Difference]: Start difference. First operand 2654 states and 3265 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:26,086 INFO L93 Difference]: Finished difference Result 7448 states and 9159 transitions. [2021-11-07 02:02:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:26,093 INFO L225 Difference]: With dead ends: 7448 [2021-11-07 02:02:26,093 INFO L226 Difference]: Without dead ends: 5234 [2021-11-07 02:02:26,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2021-11-07 02:02:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 5232. [2021-11-07 02:02:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 5231 states have (on average 1.2156375454024086) internal successors, (6359), 5231 states have internal predecessors, (6359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 6359 transitions. [2021-11-07 02:02:26,613 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 6359 transitions. Word has length 91 [2021-11-07 02:02:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:26,613 INFO L470 AbstractCegarLoop]: Abstraction has 5232 states and 6359 transitions. [2021-11-07 02:02:26,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 6359 transitions. [2021-11-07 02:02:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:02:26,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:26,615 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:26,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 02:02:26,616 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash -553003964, now seen corresponding path program 1 times [2021-11-07 02:02:26,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:26,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636728043] [2021-11-07 02:02:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:26,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:26,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:26,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636728043] [2021-11-07 02:02:26,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636728043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:26,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:26,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:26,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302126113] [2021-11-07 02:02:26,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:26,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:26,677 INFO L87 Difference]: Start difference. First operand 5232 states and 6359 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:27,084 INFO L93 Difference]: Finished difference Result 7436 states and 9077 transitions. [2021-11-07 02:02:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:27,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:02:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:27,088 INFO L225 Difference]: With dead ends: 7436 [2021-11-07 02:02:27,088 INFO L226 Difference]: Without dead ends: 3022 [2021-11-07 02:02:27,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-11-07 02:02:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 3020. [2021-11-07 02:02:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 1.1934415369327591) internal successors, (3603), 3019 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 3603 transitions. [2021-11-07 02:02:27,387 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 3603 transitions. Word has length 91 [2021-11-07 02:02:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:27,387 INFO L470 AbstractCegarLoop]: Abstraction has 3020 states and 3603 transitions. [2021-11-07 02:02:27,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 3603 transitions. [2021-11-07 02:02:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:02:27,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:27,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:27,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 02:02:27,389 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:27,390 INFO L85 PathProgramCache]: Analyzing trace with hash -594141105, now seen corresponding path program 1 times [2021-11-07 02:02:27,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:27,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663296413] [2021-11-07 02:02:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:27,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:27,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:27,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663296413] [2021-11-07 02:02:27,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663296413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:27,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:27,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:02:27,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780345976] [2021-11-07 02:02:27,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:27,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:27,524 INFO L87 Difference]: Start difference. First operand 3020 states and 3603 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:28,230 INFO L93 Difference]: Finished difference Result 5332 states and 6447 transitions. [2021-11-07 02:02:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:02:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 02:02:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:28,235 INFO L225 Difference]: With dead ends: 5332 [2021-11-07 02:02:28,236 INFO L226 Difference]: Without dead ends: 3474 [2021-11-07 02:02:28,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3474 states. [2021-11-07 02:02:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3474 to 3372. [2021-11-07 02:02:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 1.1957876001186591) internal successors, (4031), 3371 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4031 transitions. [2021-11-07 02:02:28,582 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4031 transitions. Word has length 93 [2021-11-07 02:02:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:28,582 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 4031 transitions. [2021-11-07 02:02:28,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4031 transitions. [2021-11-07 02:02:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:02:28,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:28,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:28,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 02:02:28,584 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1220484008, now seen corresponding path program 1 times [2021-11-07 02:02:28,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:28,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327718631] [2021-11-07 02:02:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:28,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:28,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:28,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327718631] [2021-11-07 02:02:28,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327718631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:28,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:28,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 02:02:28,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312894052] [2021-11-07 02:02:28,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:28,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:28,668 INFO L87 Difference]: Start difference. First operand 3372 states and 4031 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:29,252 INFO L93 Difference]: Finished difference Result 6768 states and 8169 transitions. [2021-11-07 02:02:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:02:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 02:02:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:29,258 INFO L225 Difference]: With dead ends: 6768 [2021-11-07 02:02:29,258 INFO L226 Difference]: Without dead ends: 4558 [2021-11-07 02:02:29,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-11-07 02:02:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 3452. [2021-11-07 02:02:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 1.1889307447116777) internal successors, (4103), 3451 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 4103 transitions. [2021-11-07 02:02:29,661 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 4103 transitions. Word has length 94 [2021-11-07 02:02:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:29,662 INFO L470 AbstractCegarLoop]: Abstraction has 3452 states and 4103 transitions. [2021-11-07 02:02:29,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 4103 transitions. [2021-11-07 02:02:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 02:02:29,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:29,664 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:02:29,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 02:02:29,665 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1479630157, now seen corresponding path program 1 times [2021-11-07 02:02:29,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:29,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739604249] [2021-11-07 02:02:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:29,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:02:30,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:30,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739604249] [2021-11-07 02:02:30,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739604249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:30,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:30,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 02:02:30,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738652929] [2021-11-07 02:02:30,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:02:30,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:02:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:30,040 INFO L87 Difference]: Start difference. First operand 3452 states and 4103 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:31,050 INFO L93 Difference]: Finished difference Result 8186 states and 9794 transitions. [2021-11-07 02:02:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:02:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 02:02:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:31,056 INFO L225 Difference]: With dead ends: 8186 [2021-11-07 02:02:31,056 INFO L226 Difference]: Without dead ends: 5008 [2021-11-07 02:02:31,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2021-11-07 02:02:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5004. [2021-11-07 02:02:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 5003 states have (on average 1.1878872676394163) internal successors, (5943), 5003 states have internal predecessors, (5943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 5943 transitions. [2021-11-07 02:02:31,636 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 5943 transitions. Word has length 114 [2021-11-07 02:02:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:31,636 INFO L470 AbstractCegarLoop]: Abstraction has 5004 states and 5943 transitions. [2021-11-07 02:02:31,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 5943 transitions. [2021-11-07 02:02:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 02:02:31,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:31,639 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:02:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 02:02:31,640 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 279558126, now seen corresponding path program 1 times [2021-11-07 02:02:31,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:31,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014777472] [2021-11-07 02:02:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:31,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:02:31,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:31,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014777472] [2021-11-07 02:02:31,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014777472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:31,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:31,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:02:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152357210] [2021-11-07 02:02:31,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:31,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:31,792 INFO L87 Difference]: Start difference. First operand 5004 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:32,940 INFO L93 Difference]: Finished difference Result 10720 states and 12857 transitions. [2021-11-07 02:02:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 02:02:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:32,951 INFO L225 Difference]: With dead ends: 10720 [2021-11-07 02:02:32,951 INFO L226 Difference]: Without dead ends: 7854 [2021-11-07 02:02:32,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2021-11-07 02:02:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 6300. [2021-11-07 02:02:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 6299 states have (on average 1.191141451023972) internal successors, (7503), 6299 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 7503 transitions. [2021-11-07 02:02:33,840 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 7503 transitions. Word has length 114 [2021-11-07 02:02:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:33,841 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 7503 transitions. [2021-11-07 02:02:33,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 7503 transitions. [2021-11-07 02:02:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 02:02:33,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:33,845 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:02:33,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 02:02:33,846 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1606943315, now seen corresponding path program 1 times [2021-11-07 02:02:33,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:33,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029289350] [2021-11-07 02:02:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:33,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:02:34,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:02:34,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029289350] [2021-11-07 02:02:34,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029289350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:34,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:34,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 02:02:34,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607982226] [2021-11-07 02:02:34,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:02:34,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:02:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:02:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:02:34,552 INFO L87 Difference]: Start difference. First operand 6300 states and 7503 transitions. Second operand has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:36,323 INFO L93 Difference]: Finished difference Result 12716 states and 15115 transitions. [2021-11-07 02:02:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:02:36,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 02:02:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:36,333 INFO L225 Difference]: With dead ends: 12716 [2021-11-07 02:02:36,334 INFO L226 Difference]: Without dead ends: 6470 [2021-11-07 02:02:36,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:02:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6470 states. [2021-11-07 02:02:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6470 to 6300. [2021-11-07 02:02:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 6299 states have (on average 1.170185743768852) internal successors, (7371), 6299 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 7371 transitions. [2021-11-07 02:02:37,396 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 7371 transitions. Word has length 114 [2021-11-07 02:02:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:37,397 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 7371 transitions. [2021-11-07 02:02:37,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 7371 transitions. [2021-11-07 02:02:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 02:02:37,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:37,400 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:02:37,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 02:02:37,400 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:02:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:37,401 INFO L85 PathProgramCache]: Analyzing trace with hash 566647283, now seen corresponding path program 1 times [2021-11-07 02:02:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:02:37,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434889192] [2021-11-07 02:02:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:37,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:02:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:28,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:06:28,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434889192] [2021-11-07 02:06:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434889192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:06:28,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321109485] [2021-11-07 02:06:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:28,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:06:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:28,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:06:28,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_704d9871-376f-4292-8b77-a3ce2814295a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:06:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-07 02:06:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:32,113 WARN L207 SmtUtils]: Spent 11.76 s on a formula simplification that was a NOOP. DAG size: 270 [2021-11-07 02:12:07,529 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 02:12:13,871 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 02:12:17,049 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 02:12:24,146 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.