./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-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_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/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_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/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_d657e217-40ce-4670-86ce-c30d17ab9678/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 e2c31a6d36722edb2a8cb670626aeeca5f235139fff7eadbabd05db5fa398d5d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:34,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:34,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:34,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:34,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:34,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:34,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:34,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:34,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:34,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:34,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:34,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:34,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:34,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:34,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:34,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:34,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:34,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:34,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:34,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:34,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:34,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:34,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:34,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:34,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:34,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:34,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:34,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:34,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:34,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:34,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:34,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:34,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:34,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:34,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:34,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:34,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:34,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:34,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:34,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:34,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:34,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:22:34,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:34,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:34,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:34,441 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:34,441 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:34,441 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:34,442 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:22:34,442 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:34,442 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:34,443 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:22:34,443 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:22:34,443 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:34,444 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:22:34,444 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:22:34,444 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:22:34,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:34,446 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:34,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:22:34,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:34,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:34,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:34,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:34,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:34,448 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:34,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:34,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:34,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:34,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:34,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:34,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:34,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:34,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:34,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:34,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:34,452 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:22:34,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:22:34,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:34,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:34,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:34,454 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_d657e217-40ce-4670-86ce-c30d17ab9678/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2c31a6d36722edb2a8cb670626aeeca5f235139fff7eadbabd05db5fa398d5d [2021-11-07 01:22:34,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:34,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:34,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:34,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:34,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:34,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 01:22:34,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/data/39e80f6c9/066f20058ca34bc0bfb64b14a8de4bbc/FLAGfb7f01e93 [2021-11-07 01:22:35,801 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:35,802 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 01:22:35,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/data/39e80f6c9/066f20058ca34bc0bfb64b14a8de4bbc/FLAGfb7f01e93 [2021-11-07 01:22:35,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/data/39e80f6c9/066f20058ca34bc0bfb64b14a8de4bbc [2021-11-07 01:22:35,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:35,989 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:35,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:35,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:35,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:35,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:35" (1/1) ... [2021-11-07 01:22:36,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536c95ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:36, skipping insertion in model container [2021-11-07 01:22:36,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:35" (1/1) ... [2021-11-07 01:22:36,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:36,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:36,691 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_d657e217-40ce-4670-86ce-c30d17ab9678/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14519,14532] [2021-11-07 01:22:36,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:36,952 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:37,170 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_d657e217-40ce-4670-86ce-c30d17ab9678/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14519,14532] [2021-11-07 01:22:37,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:37,270 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:37,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37 WrapperNode [2021-11-07 01:22:37,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:37,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:37,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:37,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:37,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:37,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:37,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:37,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:37,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:37,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:37,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:37,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:37,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (1/1) ... [2021-11-07 01:22:37,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:37,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:37,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d657e217-40ce-4670-86ce-c30d17ab9678/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:22:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:37,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:22:40,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:22:40,889 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:22:40,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:40 BoogieIcfgContainer [2021-11-07 01:22:40,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:22:40,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:22:40,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:22:40,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:22:40,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:35" (1/3) ... [2021-11-07 01:22:40,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bd18df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:40, skipping insertion in model container [2021-11-07 01:22:40,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:37" (2/3) ... [2021-11-07 01:22:40,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bd18df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:40, skipping insertion in model container [2021-11-07 01:22:40,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:40" (3/3) ... [2021-11-07 01:22:40,914 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 01:22:40,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:22:40,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:22:40,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:22:41,007 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 01:22:41,007 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:22:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 224 states have (on average 1.7633928571428572) internal successors, (395), 225 states have internal predecessors, (395), 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 01:22:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:22:41,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:41,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:41,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1074157564, now seen corresponding path program 1 times [2021-11-07 01:22:41,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:41,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762005177] [2021-11-07 01:22:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:41,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:42,416 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 01:22:42,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:42,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762005177] [2021-11-07 01:22:42,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762005177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:42,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:42,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:42,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551950157] [2021-11-07 01:22:42,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:42,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:42,457 INFO L87 Difference]: Start difference. First operand has 226 states, 224 states have (on average 1.7633928571428572) internal successors, (395), 225 states have internal predecessors, (395), 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 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 01:22:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:42,793 INFO L93 Difference]: Finished difference Result 555 states and 963 transitions. [2021-11-07 01:22:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:42,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 113 [2021-11-07 01:22:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:42,839 INFO L225 Difference]: With dead ends: 555 [2021-11-07 01:22:42,840 INFO L226 Difference]: Without dead ends: 386 [2021-11-07 01:22:42,850 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 01:22:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-07 01:22:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-07 01:22:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.3446475195822454) internal successors, (515), 383 states have internal predecessors, (515), 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 01:22:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2021-11-07 01:22:43,031 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 515 transitions. Word has length 113 [2021-11-07 01:22:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:43,033 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 515 transitions. [2021-11-07 01:22:43,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 01:22:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 515 transitions. [2021-11-07 01:22:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:22:43,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:43,052 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, 1, 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 01:22:43,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:22:43,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1238324424, now seen corresponding path program 1 times [2021-11-07 01:22:43,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:43,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229734355] [2021-11-07 01:22:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:43,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:43,371 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 01:22:43,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:43,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229734355] [2021-11-07 01:22:43,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229734355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:43,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:43,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:22:43,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577069448] [2021-11-07 01:22:43,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:43,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:43,382 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 01:22:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:43,489 INFO L93 Difference]: Finished difference Result 646 states and 877 transitions. [2021-11-07 01:22:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2021-11-07 01:22:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:43,500 INFO L225 Difference]: With dead ends: 646 [2021-11-07 01:22:43,500 INFO L226 Difference]: Without dead ends: 541 [2021-11-07 01:22:43,507 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 01:22:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-07 01:22:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-11-07 01:22:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.342007434944238) internal successors, (722), 538 states have internal predecessors, (722), 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 01:22:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 722 transitions. [2021-11-07 01:22:43,579 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 722 transitions. Word has length 119 [2021-11-07 01:22:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 722 transitions. [2021-11-07 01:22:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 01:22:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 722 transitions. [2021-11-07 01:22:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:22:43,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:43,600 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, 1, 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 01:22:43,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:22:43,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 567881519, now seen corresponding path program 1 times [2021-11-07 01:22:43,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:43,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064489481] [2021-11-07 01:22:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:43,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:44,049 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 01:22:44,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:44,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064489481] [2021-11-07 01:22:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064489481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:44,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:44,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:22:44,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786455843] [2021-11-07 01:22:44,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:22:44,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:22:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:44,070 INFO L87 Difference]: Start difference. First operand 539 states and 722 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 6 states have internal predecessors, (119), 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 01:22:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:45,050 INFO L93 Difference]: Finished difference Result 1905 states and 2557 transitions. [2021-11-07 01:22:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 6 states have internal predecessors, (119), 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 119 [2021-11-07 01:22:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:45,074 INFO L225 Difference]: With dead ends: 1905 [2021-11-07 01:22:45,074 INFO L226 Difference]: Without dead ends: 1417 [2021-11-07 01:22:45,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:22:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-11-07 01:22:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1413. [2021-11-07 01:22:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 1.3045325779036827) internal successors, (1842), 1412 states have internal predecessors, (1842), 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 01:22:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1842 transitions. [2021-11-07 01:22:45,256 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1842 transitions. Word has length 119 [2021-11-07 01:22:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:45,257 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 1842 transitions. [2021-11-07 01:22:45,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 6 states have internal predecessors, (119), 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 01:22:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1842 transitions. [2021-11-07 01:22:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:22:45,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:45,263 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, 1, 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 01:22:45,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:22:45,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:45,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1347224746, now seen corresponding path program 1 times [2021-11-07 01:22:45,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:45,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256933457] [2021-11-07 01:22:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:45,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:45,765 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 01:22:45,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:45,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256933457] [2021-11-07 01:22:45,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256933457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:45,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:45,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:45,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094675039] [2021-11-07 01:22:45,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:45,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:45,778 INFO L87 Difference]: Start difference. First operand 1413 states and 1842 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 01:22:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:46,128 INFO L93 Difference]: Finished difference Result 2558 states and 3433 transitions. [2021-11-07 01:22:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:46,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 119 [2021-11-07 01:22:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:46,144 INFO L225 Difference]: With dead ends: 2558 [2021-11-07 01:22:46,145 INFO L226 Difference]: Without dead ends: 1709 [2021-11-07 01:22:46,147 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 01:22:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-11-07 01:22:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1707. [2021-11-07 01:22:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 1.317116060961313) internal successors, (2247), 1706 states have internal predecessors, (2247), 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 01:22:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2247 transitions. [2021-11-07 01:22:46,358 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2247 transitions. Word has length 119 [2021-11-07 01:22:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:46,359 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 2247 transitions. [2021-11-07 01:22:46,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 01:22:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2247 transitions. [2021-11-07 01:22:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:22:46,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:46,365 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, 1, 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 01:22:46,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:22:46,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -547832797, now seen corresponding path program 1 times [2021-11-07 01:22:46,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:46,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282921998] [2021-11-07 01:22:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:46,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:46,499 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 01:22:46,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:46,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282921998] [2021-11-07 01:22:46,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282921998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:46,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:46,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:46,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784644073] [2021-11-07 01:22:46,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:46,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:46,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:46,505 INFO L87 Difference]: Start difference. First operand 1707 states and 2247 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 01:22:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:47,028 INFO L93 Difference]: Finished difference Result 3301 states and 4346 transitions. [2021-11-07 01:22:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 119 [2021-11-07 01:22:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:47,045 INFO L225 Difference]: With dead ends: 3301 [2021-11-07 01:22:47,046 INFO L226 Difference]: Without dead ends: 1707 [2021-11-07 01:22:47,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:22:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-11-07 01:22:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2021-11-07 01:22:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 1.2924970691676436) internal successors, (2205), 1706 states have internal predecessors, (2205), 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 01:22:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2205 transitions. [2021-11-07 01:22:47,281 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2205 transitions. Word has length 119 [2021-11-07 01:22:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:47,282 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 2205 transitions. [2021-11-07 01:22:47,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 01:22:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2205 transitions. [2021-11-07 01:22:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:22:47,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:47,288 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, 1, 1, 1, 1, 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 01:22:47,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:22:47,289 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:47,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1462038536, now seen corresponding path program 1 times [2021-11-07 01:22:47,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:47,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062040126] [2021-11-07 01:22:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:47,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:47,660 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 01:22:47,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:47,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062040126] [2021-11-07 01:22:47,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062040126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:47,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:47,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:47,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530628253] [2021-11-07 01:22:47,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:47,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:47,665 INFO L87 Difference]: Start difference. First operand 1707 states and 2205 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 01:22:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:48,148 INFO L93 Difference]: Finished difference Result 4879 states and 6315 transitions. [2021-11-07 01:22:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 119 [2021-11-07 01:22:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:48,178 INFO L225 Difference]: With dead ends: 4879 [2021-11-07 01:22:48,179 INFO L226 Difference]: Without dead ends: 3255 [2021-11-07 01:22:48,184 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 01:22:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-11-07 01:22:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3253. [2021-11-07 01:22:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 3252 states have (on average 1.28690036900369) internal successors, (4185), 3252 states have internal predecessors, (4185), 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 01:22:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4185 transitions. [2021-11-07 01:22:48,642 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4185 transitions. Word has length 119 [2021-11-07 01:22:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:48,643 INFO L470 AbstractCegarLoop]: Abstraction has 3253 states and 4185 transitions. [2021-11-07 01:22:48,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 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 01:22:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4185 transitions. [2021-11-07 01:22:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 01:22:48,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:48,652 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, 1, 1, 1, 1, 1, 1, 1, 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 01:22:48,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:22:48,653 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:48,654 INFO L85 PathProgramCache]: Analyzing trace with hash -736564102, now seen corresponding path program 1 times [2021-11-07 01:22:48,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:48,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683546583] [2021-11-07 01:22:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:48,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:49,011 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 01:22:49,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:49,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683546583] [2021-11-07 01:22:49,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683546583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:49,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:49,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:49,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159106715] [2021-11-07 01:22:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:49,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:49,016 INFO L87 Difference]: Start difference. First operand 3253 states and 4185 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 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 01:22:49,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:49,559 INFO L93 Difference]: Finished difference Result 5360 states and 6897 transitions. [2021-11-07 01:22:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 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 125 [2021-11-07 01:22:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:49,593 INFO L225 Difference]: With dead ends: 5360 [2021-11-07 01:22:49,594 INFO L226 Difference]: Without dead ends: 3974 [2021-11-07 01:22:49,600 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 01:22:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-11-07 01:22:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3972. [2021-11-07 01:22:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 1.271216318307731) internal successors, (5048), 3971 states have internal predecessors, (5048), 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 01:22:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 5048 transitions. [2021-11-07 01:22:50,199 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 5048 transitions. Word has length 125 [2021-11-07 01:22:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 5048 transitions. [2021-11-07 01:22:50,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 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 01:22:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 5048 transitions. [2021-11-07 01:22:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 01:22:50,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:50,210 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, 1, 1, 1, 1, 1, 1, 1, 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 01:22:50,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:22:50,211 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:50,211 INFO L85 PathProgramCache]: Analyzing trace with hash 643024380, now seen corresponding path program 1 times [2021-11-07 01:22:50,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:50,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072875777] [2021-11-07 01:22:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:50,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:50,701 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 01:22:50,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:50,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072875777] [2021-11-07 01:22:50,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072875777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:50,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:50,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:22:50,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863870931] [2021-11-07 01:22:50,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:22:50,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:50,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:22:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:22:50,706 INFO L87 Difference]: Start difference. First operand 3972 states and 5048 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 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 01:22:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:51,172 INFO L93 Difference]: Finished difference Result 3976 states and 5050 transitions. [2021-11-07 01:22:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:22:51,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 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 125 [2021-11-07 01:22:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:51,203 INFO L225 Difference]: With dead ends: 3976 [2021-11-07 01:22:51,203 INFO L226 Difference]: Without dead ends: 3454 [2021-11-07 01:22:51,207 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 01:22:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-11-07 01:22:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3188. [2021-11-07 01:22:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 1.2613743332287417) internal successors, (4020), 3187 states have internal predecessors, (4020), 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 01:22:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 4020 transitions. [2021-11-07 01:22:51,693 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 4020 transitions. Word has length 125 [2021-11-07 01:22:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:51,694 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 4020 transitions. [2021-11-07 01:22:51,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 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 01:22:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 4020 transitions. [2021-11-07 01:22:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:22:51,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:51,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:22:51,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:22:51,705 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 172227793, now seen corresponding path program 1 times [2021-11-07 01:22:51,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:51,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821387435] [2021-11-07 01:22:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:51,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:52,131 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 01:22:52,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:22:52,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821387435] [2021-11-07 01:22:52,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821387435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:52,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:52,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:22:52,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46545804] [2021-11-07 01:22:52,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:22:52,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:22:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:22:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:22:52,141 INFO L87 Difference]: Start difference. First operand 3188 states and 4020 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 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 01:22:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:53,213 INFO L93 Difference]: Finished difference Result 6340 states and 7998 transitions. [2021-11-07 01:22:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 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 131 [2021-11-07 01:22:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:53,240 INFO L225 Difference]: With dead ends: 6340 [2021-11-07 01:22:53,240 INFO L226 Difference]: Without dead ends: 3190 [2021-11-07 01:22:53,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:22:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-11-07 01:22:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3188. [2021-11-07 01:22:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 1.2359585817383119) internal successors, (3939), 3187 states have internal predecessors, (3939), 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 01:22:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 3939 transitions. [2021-11-07 01:22:53,889 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 3939 transitions. Word has length 131 [2021-11-07 01:22:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:53,890 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 3939 transitions. [2021-11-07 01:22:53,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 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 01:22:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 3939 transitions. [2021-11-07 01:22:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:22:53,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:53,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:22:53,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:22:53,901 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1707175446, now seen corresponding path program 1 times [2021-11-07 01:22:53,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:22:53,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214788757] [2021-11-07 01:22:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:53,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:22:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:22,935 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 01:23:22,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:23:22,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214788757] [2021-11-07 01:23:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214788757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:22,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:22,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-07 01:23:22,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245323972] [2021-11-07 01:23:22,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 01:23:22,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:23:22,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 01:23:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:23:22,942 INFO L87 Difference]: Start difference. First operand 3188 states and 3939 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 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 01:23:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:58,908 INFO L93 Difference]: Finished difference Result 5698 states and 7307 transitions. [2021-11-07 01:23:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:23:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 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 131 [2021-11-07 01:23:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:58,944 INFO L225 Difference]: With dead ends: 5698 [2021-11-07 01:23:58,944 INFO L226 Difference]: Without dead ends: 4515 [2021-11-07 01:23:58,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=1362, Invalid=5610, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 01:23:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2021-11-07 01:23:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4115. [2021-11-07 01:23:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 4114 states have (on average 1.2518230432668935) internal successors, (5150), 4114 states have internal predecessors, (5150), 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 01:23:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5150 transitions. [2021-11-07 01:23:59,551 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5150 transitions. Word has length 131 [2021-11-07 01:23:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:59,552 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5150 transitions. [2021-11-07 01:23:59,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 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 01:23:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5150 transitions. [2021-11-07 01:23:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:23:59,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:59,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:23:59,563 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1389539648, now seen corresponding path program 1 times [2021-11-07 01:23:59,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:23:59,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424409972] [2021-11-07 01:23:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:59,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:23:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:59,678 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 01:23:59,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:23:59,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424409972] [2021-11-07 01:23:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424409972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:59,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:59,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:23:59,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27607356] [2021-11-07 01:23:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:23:59,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:23:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:23:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:23:59,683 INFO L87 Difference]: Start difference. First operand 4115 states and 5150 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 01:24:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:00,370 INFO L93 Difference]: Finished difference Result 4959 states and 6244 transitions. [2021-11-07 01:24:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:00,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 131 [2021-11-07 01:24:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:00,405 INFO L225 Difference]: With dead ends: 4959 [2021-11-07 01:24:00,405 INFO L226 Difference]: Without dead ends: 4117 [2021-11-07 01:24:00,409 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 01:24:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-11-07 01:24:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 4115. [2021-11-07 01:24:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 4114 states have (on average 1.2408847836655323) internal successors, (5105), 4114 states have internal predecessors, (5105), 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 01:24:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5105 transitions. [2021-11-07 01:24:01,047 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5105 transitions. Word has length 131 [2021-11-07 01:24:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:01,048 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5105 transitions. [2021-11-07 01:24:01,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 01:24:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5105 transitions. [2021-11-07 01:24:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:24:01,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:01,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:01,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:24:01,063 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1463124964, now seen corresponding path program 1 times [2021-11-07 01:24:01,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:01,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063123384] [2021-11-07 01:24:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:01,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:01,429 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 01:24:01,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:01,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063123384] [2021-11-07 01:24:01,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063123384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:01,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:01,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:24:01,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489667262] [2021-11-07 01:24:01,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:24:01,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:24:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:24:01,433 INFO L87 Difference]: Start difference. First operand 4115 states and 5105 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 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 01:24:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:02,079 INFO L93 Difference]: Finished difference Result 4519 states and 5628 transitions. [2021-11-07 01:24:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:24:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2021-11-07 01:24:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:02,129 INFO L225 Difference]: With dead ends: 4519 [2021-11-07 01:24:02,129 INFO L226 Difference]: Without dead ends: 3587 [2021-11-07 01:24:02,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-11-07 01:24:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3585. [2021-11-07 01:24:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3584 states have (on average 1.2393973214285714) internal successors, (4442), 3584 states have internal predecessors, (4442), 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 01:24:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 4442 transitions. [2021-11-07 01:24:02,766 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 4442 transitions. Word has length 131 [2021-11-07 01:24:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:02,767 INFO L470 AbstractCegarLoop]: Abstraction has 3585 states and 4442 transitions. [2021-11-07 01:24:02,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 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 01:24:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 4442 transitions. [2021-11-07 01:24:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:24:02,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:02,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:24:02,776 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 96391930, now seen corresponding path program 1 times [2021-11-07 01:24:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:24:02,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960594674] [2021-11-07 01:24:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:24:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:32,203 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 01:24:32,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:24:32,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960594674] [2021-11-07 01:24:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960594674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:32,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:32,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-07 01:24:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668950235] [2021-11-07 01:24:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 01:24:32,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:24:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 01:24:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 01:24:32,208 INFO L87 Difference]: Start difference. First operand 3585 states and 4442 transitions. Second operand has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 42 states have internal predecessors, (131), 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 01:25:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:01,396 INFO L93 Difference]: Finished difference Result 4436 states and 5490 transitions. [2021-11-07 01:25:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:25:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 42 states have internal predecessors, (131), 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 131 [2021-11-07 01:25:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:01,407 INFO L225 Difference]: With dead ends: 4436 [2021-11-07 01:25:01,407 INFO L226 Difference]: Without dead ends: 3973 [2021-11-07 01:25:01,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=1108, Invalid=5054, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 01:25:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-11-07 01:25:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3691. [2021-11-07 01:25:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3691 states, 3690 states have (on average 1.2349593495934958) internal successors, (4557), 3690 states have internal predecessors, (4557), 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 01:25:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 4557 transitions. [2021-11-07 01:25:01,939 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 4557 transitions. Word has length 131 [2021-11-07 01:25:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:01,939 INFO L470 AbstractCegarLoop]: Abstraction has 3691 states and 4557 transitions. [2021-11-07 01:25:01,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 42 states have internal predecessors, (131), 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 01:25:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 4557 transitions. [2021-11-07 01:25:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:25:01,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:01,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:01,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:25:01,947 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2110026530, now seen corresponding path program 1 times [2021-11-07 01:25:01,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:01,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068442419] [2021-11-07 01:25:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:01,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:02,006 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 01:25:02,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:02,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068442419] [2021-11-07 01:25:02,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068442419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:02,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:02,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:02,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552602568] [2021-11-07 01:25:02,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:02,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:02,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:02,010 INFO L87 Difference]: Start difference. First operand 3691 states and 4557 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:02,988 INFO L93 Difference]: Finished difference Result 6746 states and 8427 transitions. [2021-11-07 01:25:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-11-07 01:25:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:03,002 INFO L225 Difference]: With dead ends: 6746 [2021-11-07 01:25:03,002 INFO L226 Difference]: Without dead ends: 4240 [2021-11-07 01:25:03,016 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 01:25:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-11-07 01:25:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3632. [2021-11-07 01:25:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 1.2263839162765078) internal successors, (4453), 3631 states have internal predecessors, (4453), 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 01:25:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 4453 transitions. [2021-11-07 01:25:03,828 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 4453 transitions. Word has length 132 [2021-11-07 01:25:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 3632 states and 4453 transitions. [2021-11-07 01:25:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 4453 transitions. [2021-11-07 01:25:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:25:03,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:03,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:03,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:25:03,838 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1711263730, now seen corresponding path program 1 times [2021-11-07 01:25:03,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:03,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293245074] [2021-11-07 01:25:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:03,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:03,921 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 01:25:03,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:03,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293245074] [2021-11-07 01:25:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293245074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:03,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:03,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:03,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306382797] [2021-11-07 01:25:03,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:03,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:03,926 INFO L87 Difference]: Start difference. First operand 3632 states and 4453 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:04,697 INFO L93 Difference]: Finished difference Result 6027 states and 7404 transitions. [2021-11-07 01:25:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-11-07 01:25:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:04,705 INFO L225 Difference]: With dead ends: 6027 [2021-11-07 01:25:04,705 INFO L226 Difference]: Without dead ends: 3636 [2021-11-07 01:25:04,709 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 01:25:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-11-07 01:25:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 3584. [2021-11-07 01:25:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 1.2154619034328775) internal successors, (4355), 3583 states have internal predecessors, (4355), 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 01:25:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 4355 transitions. [2021-11-07 01:25:05,333 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 4355 transitions. Word has length 132 [2021-11-07 01:25:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:05,333 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 4355 transitions. [2021-11-07 01:25:05,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 4355 transitions. [2021-11-07 01:25:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:25:05,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:05,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:05,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:25:05,343 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash -607722230, now seen corresponding path program 1 times [2021-11-07 01:25:05,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:05,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161218686] [2021-11-07 01:25:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:05,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:05,434 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 01:25:05,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:05,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161218686] [2021-11-07 01:25:05,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161218686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:05,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:05,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:05,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038030617] [2021-11-07 01:25:05,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:05,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:05,438 INFO L87 Difference]: Start difference. First operand 3584 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:06,138 INFO L93 Difference]: Finished difference Result 6170 states and 7549 transitions. [2021-11-07 01:25:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-11-07 01:25:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:06,150 INFO L225 Difference]: With dead ends: 6170 [2021-11-07 01:25:06,151 INFO L226 Difference]: Without dead ends: 3759 [2021-11-07 01:25:06,157 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 01:25:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-11-07 01:25:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3445. [2021-11-07 01:25:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 1.2096399535423925) internal successors, (4166), 3444 states have internal predecessors, (4166), 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 01:25:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4166 transitions. [2021-11-07 01:25:06,744 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4166 transitions. Word has length 132 [2021-11-07 01:25:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:06,745 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 4166 transitions. [2021-11-07 01:25:06,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4166 transitions. [2021-11-07 01:25:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:25:06,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:06,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:06,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:25:06,752 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1732039385, now seen corresponding path program 1 times [2021-11-07 01:25:06,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:06,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473028794] [2021-11-07 01:25:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:06,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:06,810 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 01:25:06,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:06,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473028794] [2021-11-07 01:25:06,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473028794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:06,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:06,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:06,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725809856] [2021-11-07 01:25:06,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:06,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:06,814 INFO L87 Difference]: Start difference. First operand 3445 states and 4166 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:07,440 INFO L93 Difference]: Finished difference Result 6109 states and 7448 transitions. [2021-11-07 01:25:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-11-07 01:25:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:07,454 INFO L225 Difference]: With dead ends: 6109 [2021-11-07 01:25:07,455 INFO L226 Difference]: Without dead ends: 3712 [2021-11-07 01:25:07,460 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 01:25:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-11-07 01:25:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3402. [2021-11-07 01:25:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 1.199059100264628) internal successors, (4078), 3401 states have internal predecessors, (4078), 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 01:25:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4078 transitions. [2021-11-07 01:25:08,049 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4078 transitions. Word has length 132 [2021-11-07 01:25:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:08,050 INFO L470 AbstractCegarLoop]: Abstraction has 3402 states and 4078 transitions. [2021-11-07 01:25:08,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4078 transitions. [2021-11-07 01:25:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:25:08,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:08,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:08,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 01:25:08,058 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2064800501, now seen corresponding path program 1 times [2021-11-07 01:25:08,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:08,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135365746] [2021-11-07 01:25:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:08,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:08,175 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 01:25:08,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:08,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135365746] [2021-11-07 01:25:08,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135365746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:08,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:08,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:08,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110326854] [2021-11-07 01:25:08,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:08,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:08,181 INFO L87 Difference]: Start difference. First operand 3402 states and 4078 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:08,882 INFO L93 Difference]: Finished difference Result 6282 states and 7591 transitions. [2021-11-07 01:25:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-11-07 01:25:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:08,893 INFO L225 Difference]: With dead ends: 6282 [2021-11-07 01:25:08,893 INFO L226 Difference]: Without dead ends: 3885 [2021-11-07 01:25:08,899 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 01:25:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-11-07 01:25:09,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3331. [2021-11-07 01:25:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3330 states have (on average 1.1894894894894894) internal successors, (3961), 3330 states have internal predecessors, (3961), 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 01:25:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 3961 transitions. [2021-11-07 01:25:09,416 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 3961 transitions. Word has length 132 [2021-11-07 01:25:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:09,416 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 3961 transitions. [2021-11-07 01:25:09,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 3961 transitions. [2021-11-07 01:25:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 01:25:09,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:09,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 01:25:09,423 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1866744555, now seen corresponding path program 1 times [2021-11-07 01:25:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:09,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422558300] [2021-11-07 01:25:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:09,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:09,503 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 01:25:09,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:09,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422558300] [2021-11-07 01:25:09,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422558300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:09,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:09,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:09,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453540741] [2021-11-07 01:25:09,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:09,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:09,509 INFO L87 Difference]: Start difference. First operand 3331 states and 3961 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:10,060 INFO L93 Difference]: Finished difference Result 5508 states and 6572 transitions. [2021-11-07 01:25:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-11-07 01:25:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:10,066 INFO L225 Difference]: With dead ends: 5508 [2021-11-07 01:25:10,067 INFO L226 Difference]: Without dead ends: 3255 [2021-11-07 01:25:10,071 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 01:25:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-11-07 01:25:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3203. [2021-11-07 01:25:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 1.179575265459088) internal successors, (3777), 3202 states have internal predecessors, (3777), 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 01:25:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 3777 transitions. [2021-11-07 01:25:10,532 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 3777 transitions. Word has length 132 [2021-11-07 01:25:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:10,535 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 3777 transitions. [2021-11-07 01:25:10,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 01:25:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 3777 transitions. [2021-11-07 01:25:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:25:10,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:10,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:10,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 01:25:10,542 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash 112511356, now seen corresponding path program 1 times [2021-11-07 01:25:10,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:10,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234404825] [2021-11-07 01:25:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:10,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:37,231 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 01:25:37,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:37,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234404825] [2021-11-07 01:25:37,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234404825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:37,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:37,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:25:37,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14888243] [2021-11-07 01:25:37,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:25:37,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:25:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:25:37,236 INFO L87 Difference]: Start difference. First operand 3203 states and 3777 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:26:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:08,500 INFO L93 Difference]: Finished difference Result 3656 states and 4345 transitions. [2021-11-07 01:26:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:26:08,500 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2021-11-07 01:26:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:08,505 INFO L225 Difference]: With dead ends: 3656 [2021-11-07 01:26:08,505 INFO L226 Difference]: Without dead ends: 3204 [2021-11-07 01:26:08,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=1098, Invalid=5382, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 01:26:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-11-07 01:26:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3202. [2021-11-07 01:26:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 1.1786941580756014) internal successors, (3773), 3201 states have internal predecessors, (3773), 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 01:26:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3773 transitions. [2021-11-07 01:26:08,862 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3773 transitions. Word has length 137 [2021-11-07 01:26:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:08,863 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 3773 transitions. [2021-11-07 01:26:08,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:26:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3773 transitions. [2021-11-07 01:26:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:26:08,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:08,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:08,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 01:26:08,868 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:08,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1748699588, now seen corresponding path program 1 times [2021-11-07 01:26:08,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:08,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526204662] [2021-11-07 01:26:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:08,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:28,527 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 01:26:28,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:28,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526204662] [2021-11-07 01:26:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526204662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:28,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:28,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:26:28,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297374349] [2021-11-07 01:26:28,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:26:28,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:26:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:26:28,531 INFO L87 Difference]: Start difference. First operand 3202 states and 3773 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:26:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:51,612 INFO L93 Difference]: Finished difference Result 3926 states and 4679 transitions. [2021-11-07 01:26:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:26:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2021-11-07 01:26:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:51,617 INFO L225 Difference]: With dead ends: 3926 [2021-11-07 01:26:51,617 INFO L226 Difference]: Without dead ends: 3466 [2021-11-07 01:26:51,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1173, Invalid=5469, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 01:26:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2021-11-07 01:26:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 3201. [2021-11-07 01:26:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 1.1778125) internal successors, (3769), 3200 states have internal predecessors, (3769), 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 01:26:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 3769 transitions. [2021-11-07 01:26:52,000 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 3769 transitions. Word has length 137 [2021-11-07 01:26:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:52,001 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 3769 transitions. [2021-11-07 01:26:52,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:26:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 3769 transitions. [2021-11-07 01:26:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:26:52,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:52,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:26:52,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 01:26:52,007 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash -789317570, now seen corresponding path program 1 times [2021-11-07 01:26:52,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:52,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053250208] [2021-11-07 01:26:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:52,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:27,505 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 01:27:27,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053250208] [2021-11-07 01:27:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053250208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:27,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:27,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:27:27,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385865905] [2021-11-07 01:27:27,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:27:27,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:27:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1907, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:27:27,509 INFO L87 Difference]: Start difference. First operand 3201 states and 3769 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:27:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:48,582 INFO L93 Difference]: Finished difference Result 3456 states and 4076 transitions. [2021-11-07 01:27:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 01:27:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2021-11-07 01:27:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:48,585 INFO L225 Difference]: With dead ends: 3456 [2021-11-07 01:27:48,585 INFO L226 Difference]: Without dead ends: 3242 [2021-11-07 01:27:48,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 01:27:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-11-07 01:27:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3200. [2021-11-07 01:27:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 3199 states have (on average 1.1772428884026258) internal successors, (3766), 3199 states have internal predecessors, (3766), 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 01:27:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 3766 transitions. [2021-11-07 01:27:48,930 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 3766 transitions. Word has length 137 [2021-11-07 01:27:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:48,930 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 3766 transitions. [2021-11-07 01:27:48,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:27:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 3766 transitions. [2021-11-07 01:27:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:27:48,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:48,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:27:48,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 01:27:48,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1150163585, now seen corresponding path program 1 times [2021-11-07 01:27:48,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:48,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265272622] [2021-11-07 01:27:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:48,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:00,188 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 01:28:00,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:28:00,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265272622] [2021-11-07 01:28:00,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265272622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:00,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:00,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-07 01:28:00,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420544340] [2021-11-07 01:28:00,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 01:28:00,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:28:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 01:28:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:28:00,191 INFO L87 Difference]: Start difference. First operand 3200 states and 3766 transitions. Second operand has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 01:28:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:15,299 INFO L93 Difference]: Finished difference Result 5966 states and 7481 transitions. [2021-11-07 01:28:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 01:28:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 137 [2021-11-07 01:28:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:15,306 INFO L225 Difference]: With dead ends: 5966 [2021-11-07 01:28:15,306 INFO L226 Difference]: Without dead ends: 4559 [2021-11-07 01:28:15,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1271, Invalid=6561, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 01:28:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-11-07 01:28:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 4553. [2021-11-07 01:28:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 1.2203427065026362) internal successors, (5555), 4552 states have internal predecessors, (5555), 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 01:28:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 5555 transitions. [2021-11-07 01:28:15,790 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 5555 transitions. Word has length 137 [2021-11-07 01:28:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:15,790 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 5555 transitions. [2021-11-07 01:28:15,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 01:28:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 5555 transitions. [2021-11-07 01:28:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:28:15,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:15,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 01:28:15,795 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1282955962, now seen corresponding path program 1 times [2021-11-07 01:28:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:28:15,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126225441] [2021-11-07 01:28:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:15,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:28:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:30,872 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 01:28:30,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:28:30,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126225441] [2021-11-07 01:28:30,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126225441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:30,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:30,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-07 01:28:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566788931] [2021-11-07 01:28:30,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 01:28:30,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:28:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 01:28:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 01:28:30,876 INFO L87 Difference]: Start difference. First operand 4553 states and 5555 transitions. Second operand has 47 states, 47 states have (on average 2.9148936170212765) internal successors, (137), 46 states have internal predecessors, (137), 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 01:28:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:59,289 INFO L93 Difference]: Finished difference Result 5653 states and 6973 transitions. [2021-11-07 01:28:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 01:28:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9148936170212765) internal successors, (137), 46 states have internal predecessors, (137), 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 137 [2021-11-07 01:28:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:59,295 INFO L225 Difference]: With dead ends: 5653 [2021-11-07 01:28:59,296 INFO L226 Difference]: Without dead ends: 4738 [2021-11-07 01:28:59,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=1309, Invalid=6523, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 01:28:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2021-11-07 01:28:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4730. [2021-11-07 01:28:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 1.2241488686825968) internal successors, (5789), 4729 states have internal predecessors, (5789), 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 01:28:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 5789 transitions. [2021-11-07 01:28:59,802 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 5789 transitions. Word has length 137 [2021-11-07 01:28:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:59,802 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 5789 transitions. [2021-11-07 01:28:59,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9148936170212765) internal successors, (137), 46 states have internal predecessors, (137), 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 01:28:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 5789 transitions. [2021-11-07 01:28:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:28:59,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:59,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:59,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 01:28:59,805 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -578254982, now seen corresponding path program 1 times [2021-11-07 01:28:59,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:28:59,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388487754] [2021-11-07 01:28:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:59,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:28:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:18,596 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 01:29:18,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:29:18,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388487754] [2021-11-07 01:29:18,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388487754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:18,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:18,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-07 01:29:18,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284704511] [2021-11-07 01:29:18,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 01:29:18,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:29:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 01:29:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1935, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 01:29:18,598 INFO L87 Difference]: Start difference. First operand 4730 states and 5789 transitions. Second operand has 47 states, 47 states have (on average 2.9148936170212765) internal successors, (137), 46 states have internal predecessors, (137), 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 01:29:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:40,182 INFO L93 Difference]: Finished difference Result 5373 states and 6622 transitions. [2021-11-07 01:29:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 01:29:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9148936170212765) internal successors, (137), 46 states have internal predecessors, (137), 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 137 [2021-11-07 01:29:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:40,187 INFO L225 Difference]: With dead ends: 5373 [2021-11-07 01:29:40,187 INFO L226 Difference]: Without dead ends: 4735 [2021-11-07 01:29:40,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1307, Invalid=6175, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 01:29:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-11-07 01:29:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 4729. [2021-11-07 01:29:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4728 states have (on average 1.2237732656514382) internal successors, (5786), 4728 states have internal predecessors, (5786), 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 01:29:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 5786 transitions. [2021-11-07 01:29:40,689 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 5786 transitions. Word has length 137 [2021-11-07 01:29:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:40,690 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 5786 transitions. [2021-11-07 01:29:40,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9148936170212765) internal successors, (137), 46 states have internal predecessors, (137), 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 01:29:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 5786 transitions. [2021-11-07 01:29:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:29:40,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:40,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:29:40,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 01:29:40,694 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -625797254, now seen corresponding path program 1 times [2021-11-07 01:29:40,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:29:40,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123405876] [2021-11-07 01:29:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:40,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:29:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:40,910 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 01:30:40,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:40,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123405876] [2021-11-07 01:30:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123405876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:40,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:40,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:30:40,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110922335] [2021-11-07 01:30:40,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:30:40,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:30:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1989, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:30:40,912 INFO L87 Difference]: Start difference. First operand 4729 states and 5786 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:31:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:17,032 INFO L93 Difference]: Finished difference Result 5278 states and 6488 transitions. [2021-11-07 01:31:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 01:31:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2021-11-07 01:31:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:17,038 INFO L225 Difference]: With dead ends: 5278 [2021-11-07 01:31:17,038 INFO L226 Difference]: Without dead ends: 4954 [2021-11-07 01:31:17,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=1140, Invalid=5666, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 01:31:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4954 states. [2021-11-07 01:31:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4954 to 4728. [2021-11-07 01:31:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 1.2233975037021367) internal successors, (5783), 4727 states have internal predecessors, (5783), 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 01:31:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 5783 transitions. [2021-11-07 01:31:17,550 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 5783 transitions. Word has length 137 [2021-11-07 01:31:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:17,550 INFO L470 AbstractCegarLoop]: Abstraction has 4728 states and 5783 transitions. [2021-11-07 01:31:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:31:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 5783 transitions. [2021-11-07 01:31:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:31:17,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:17,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:17,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 01:31:17,555 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1960798270, now seen corresponding path program 1 times [2021-11-07 01:31:17,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:31:17,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744344316] [2021-11-07 01:31:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:17,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:31:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:43,602 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 01:31:43,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:31:43,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744344316] [2021-11-07 01:31:43,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744344316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:43,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:43,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:31:43,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846889932] [2021-11-07 01:31:43,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:31:43,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:31:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:31:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:31:43,605 INFO L87 Difference]: Start difference. First operand 4728 states and 5783 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:32:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:16,904 INFO L93 Difference]: Finished difference Result 5164 states and 6343 transitions. [2021-11-07 01:32:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 01:32:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2021-11-07 01:32:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:16,909 INFO L225 Difference]: With dead ends: 5164 [2021-11-07 01:32:16,910 INFO L226 Difference]: Without dead ends: 4823 [2021-11-07 01:32:16,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=1355, Invalid=6301, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 01:32:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-11-07 01:32:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 4813. [2021-11-07 01:32:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 1.225270157938487) internal successors, (5896), 4812 states have internal predecessors, (5896), 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 01:32:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 5896 transitions. [2021-11-07 01:32:17,593 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 5896 transitions. Word has length 137 [2021-11-07 01:32:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:17,594 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 5896 transitions. [2021-11-07 01:32:17,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:32:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 5896 transitions. [2021-11-07 01:32:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:32:17,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:17,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:17,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 01:32:17,597 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1056785509, now seen corresponding path program 1 times [2021-11-07 01:32:17,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:32:17,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070072706] [2021-11-07 01:32:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:17,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:32:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:28,773 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 01:32:28,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:32:28,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070072706] [2021-11-07 01:32:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070072706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:28,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:28,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-07 01:32:28,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904154768] [2021-11-07 01:32:28,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 01:32:28,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:32:28,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 01:32:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:32:28,776 INFO L87 Difference]: Start difference. First operand 4813 states and 5896 transitions. Second operand has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 01:32:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:41,654 INFO L93 Difference]: Finished difference Result 6047 states and 7545 transitions. [2021-11-07 01:32:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 01:32:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 137 [2021-11-07 01:32:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:41,662 INFO L225 Difference]: With dead ends: 6047 [2021-11-07 01:32:41,663 INFO L226 Difference]: Without dead ends: 5484 [2021-11-07 01:32:41,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=850, Invalid=4700, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 01:32:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2021-11-07 01:32:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5116. [2021-11-07 01:32:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 5115 states have (on average 1.2304985337243401) internal successors, (6294), 5115 states have internal predecessors, (6294), 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 01:32:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 6294 transitions. [2021-11-07 01:32:42,428 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 6294 transitions. Word has length 137 [2021-11-07 01:32:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:42,428 INFO L470 AbstractCegarLoop]: Abstraction has 5116 states and 6294 transitions. [2021-11-07 01:32:42,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 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 01:32:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 6294 transitions. [2021-11-07 01:32:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:32:42,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:42,431 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:42,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 01:32:42,432 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1593609860, now seen corresponding path program 1 times [2021-11-07 01:32:42,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:32:42,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115289154] [2021-11-07 01:32:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:42,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:32:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:22,524 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 01:33:22,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:33:22,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115289154] [2021-11-07 01:33:22,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115289154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:22,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:22,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:33:22,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200629611] [2021-11-07 01:33:22,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:33:22,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:33:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:33:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:33:22,527 INFO L87 Difference]: Start difference. First operand 5116 states and 6294 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:34:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:04,098 INFO L93 Difference]: Finished difference Result 5637 states and 6968 transitions. [2021-11-07 01:34:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 01:34:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 137 [2021-11-07 01:34:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:04,104 INFO L225 Difference]: With dead ends: 5637 [2021-11-07 01:34:04,104 INFO L226 Difference]: Without dead ends: 5303 [2021-11-07 01:34:04,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=1186, Invalid=5786, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 01:34:04,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2021-11-07 01:34:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5115. [2021-11-07 01:34:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 5114 states have (on average 1.2301525224872898) internal successors, (6291), 5114 states have internal predecessors, (6291), 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 01:34:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 6291 transitions. [2021-11-07 01:34:04,832 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 6291 transitions. Word has length 137 [2021-11-07 01:34:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:04,832 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 6291 transitions. [2021-11-07 01:34:04,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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 01:34:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 6291 transitions. [2021-11-07 01:34:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:34:04,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:04,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:04,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 01:34:04,835 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash -634227842, now seen corresponding path program 1 times [2021-11-07 01:34:04,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:34:04,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870531334] [2021-11-07 01:34:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:04,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:34:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:24,030 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 01:34:24,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:34:24,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870531334] [2021-11-07 01:34:24,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870531334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:24,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:24,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-07 01:34:24,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868848526] [2021-11-07 01:34:24,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:34:24,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:34:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:34:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1987, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:34:24,033 INFO L87 Difference]: Start difference. First operand 5115 states and 6291 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 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)