./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH --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 1d2ed0f37ff2caecb0f852b41838696d35f940cfb2007be63d1246f35f6e95b8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:33:58,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:33:58,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:33:58,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:33:58,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:33:58,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:33:58,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:33:58,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:33:58,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:33:58,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:33:58,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:33:58,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:33:58,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:33:58,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:33:58,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:33:58,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:33:58,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:33:58,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:33:58,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:33:58,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:33:58,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:33:58,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:33:58,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:33:58,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:33:58,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:33:58,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:33:58,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:33:58,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:33:58,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:33:58,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:33:58,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:33:58,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:33:58,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:33:58,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:33:58,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:33:58,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:33:58,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:33:58,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:33:58,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:33:58,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:33:58,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:33:58,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:33:58,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:33:58,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:33:58,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:33:58,689 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:33:58,689 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:33:58,689 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:33:58,689 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:33:58,690 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:33:58,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:33:58,698 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:33:58,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:33:58,700 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:33:58,700 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:33:58,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:33:58,701 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:33:58,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:33:58,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:33:58,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:33:58,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:33:58,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:33:58,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:33:58,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:33:58,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:33:58,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:33:58,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:33:58,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:33:58,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:33:58,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:33:58,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:33:58,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:33:58,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:58,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:33:58,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:33:58,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:33:58,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:33:58,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:33:58,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:33:58,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:33:58,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:33:58,711 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_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d2ed0f37ff2caecb0f852b41838696d35f940cfb2007be63d1246f35f6e95b8 [2021-11-03 04:33:59,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:33:59,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:33:59,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:33:59,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:33:59,084 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:33:59,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-03 04:33:59,171 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/data/e8db1ab6f/40f8629f4fa24f3c8ee1fc972a0a1ddd/FLAG1afc3cace [2021-11-03 04:33:59,810 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:33:59,810 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-03 04:33:59,828 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/data/e8db1ab6f/40f8629f4fa24f3c8ee1fc972a0a1ddd/FLAG1afc3cace [2021-11-03 04:34:00,044 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/data/e8db1ab6f/40f8629f4fa24f3c8ee1fc972a0a1ddd [2021-11-03 04:34:00,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:34:00,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:34:00,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:34:00,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:34:00,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:34:00,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:34:00" (1/1) ... [2021-11-03 04:34:00,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bb50ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:00, skipping insertion in model container [2021-11-03 04:34:00,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:34:00" (1/1) ... [2021-11-03 04:34:00,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:34:00,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:34:00,534 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_90d26843-771c-45d3-9da5-75ba4bfbf623/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[14220,14233] [2021-11-03 04:34:00,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:34:00,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:34:00,891 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_90d26843-771c-45d3-9da5-75ba4bfbf623/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[14220,14233] [2021-11-03 04:34:01,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:34:01,102 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:34:01,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01 WrapperNode [2021-11-03 04:34:01,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:34:01,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:34:01,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:34:01,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:34:01,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:34:01,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:34:01,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:34:01,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:34:01,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:34:01,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:34:01,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:34:01,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:34:01,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (1/1) ... [2021-11-03 04:34:01,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:34:01,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:34:01,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:34:01,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d26843-771c-45d3-9da5-75ba4bfbf623/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:34:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:34:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:34:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:34:01,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:34:04,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:34:04,429 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 04:34:04,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:34:04 BoogieIcfgContainer [2021-11-03 04:34:04,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:34:04,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:34:04,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:34:04,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:34:04,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:34:00" (1/3) ... [2021-11-03 04:34:04,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb1feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:34:04, skipping insertion in model container [2021-11-03 04:34:04,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:34:01" (2/3) ... [2021-11-03 04:34:04,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb1feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:34:04, skipping insertion in model container [2021-11-03 04:34:04,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:34:04" (3/3) ... [2021-11-03 04:34:04,450 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-11-03 04:34:04,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:34:04,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:34:04,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:34:04,565 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 [2021-11-03 04:34:04,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:34:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 190 states have (on average 1.5368421052631578) internal successors, (292), 191 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:34:04,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:04,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:04,620 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1563561503, now seen corresponding path program 1 times [2021-11-03 04:34:04,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:04,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637669426] [2021-11-03 04:34:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:04,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:05,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:05,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637669426] [2021-11-03 04:34:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637669426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:05,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:05,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439499084] [2021-11-03 04:34:05,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:05,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:05,216 INFO L87 Difference]: Start difference. First operand has 192 states, 190 states have (on average 1.5368421052631578) internal successors, (292), 191 states have internal predecessors, (292), 0 states have call successors, (0), 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 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:05,471 INFO L93 Difference]: Finished difference Result 513 states and 776 transitions. [2021-11-03 04:34:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:34:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:05,491 INFO L225 Difference]: With dead ends: 513 [2021-11-03 04:34:05,494 INFO L226 Difference]: Without dead ends: 323 [2021-11-03 04:34:05,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-03 04:34:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2021-11-03 04:34:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.471875) internal successors, (471), 320 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 471 transitions. [2021-11-03 04:34:05,588 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 471 transitions. Word has length 74 [2021-11-03 04:34:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 471 transitions. [2021-11-03 04:34:05,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 471 transitions. [2021-11-03 04:34:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:34:05,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:05,596 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] [2021-11-03 04:34:05,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:34:05,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1050419475, now seen corresponding path program 1 times [2021-11-03 04:34:05,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:05,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855117700] [2021-11-03 04:34:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:05,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:05,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:05,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855117700] [2021-11-03 04:34:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855117700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:05,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:05,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:05,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353613956] [2021-11-03 04:34:05,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:05,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:05,792 INFO L87 Difference]: Start difference. First operand 321 states and 471 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:05,976 INFO L93 Difference]: Finished difference Result 868 states and 1275 transitions. [2021-11-03 04:34:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-03 04:34:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:05,982 INFO L225 Difference]: With dead ends: 868 [2021-11-03 04:34:05,982 INFO L226 Difference]: Without dead ends: 561 [2021-11-03 04:34:05,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-03 04:34:06,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 559. [2021-11-03 04:34:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.460573476702509) internal successors, (815), 558 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 815 transitions. [2021-11-03 04:34:06,062 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 815 transitions. Word has length 83 [2021-11-03 04:34:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:06,063 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 815 transitions. [2021-11-03 04:34:06,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 815 transitions. [2021-11-03 04:34:06,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 04:34:06,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:06,071 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] [2021-11-03 04:34:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:34:06,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash 546167995, now seen corresponding path program 1 times [2021-11-03 04:34:06,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:06,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625821208] [2021-11-03 04:34:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:06,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:06,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:06,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625821208] [2021-11-03 04:34:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625821208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:06,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:06,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036113706] [2021-11-03 04:34:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:06,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:06,195 INFO L87 Difference]: Start difference. First operand 559 states and 815 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:06,351 INFO L93 Difference]: Finished difference Result 1528 states and 2228 transitions. [2021-11-03 04:34:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-11-03 04:34:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:06,360 INFO L225 Difference]: With dead ends: 1528 [2021-11-03 04:34:06,360 INFO L226 Difference]: Without dead ends: 989 [2021-11-03 04:34:06,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-11-03 04:34:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 987. [2021-11-03 04:34:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 1.4462474645030425) internal successors, (1426), 986 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1426 transitions. [2021-11-03 04:34:06,478 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1426 transitions. Word has length 92 [2021-11-03 04:34:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:06,479 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1426 transitions. [2021-11-03 04:34:06,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1426 transitions. [2021-11-03 04:34:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 04:34:06,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:06,494 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] [2021-11-03 04:34:06,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:34:06,496 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1912646872, now seen corresponding path program 1 times [2021-11-03 04:34:06,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:06,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621848067] [2021-11-03 04:34:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:06,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:06,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621848067] [2021-11-03 04:34:06,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621848067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:06,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:06,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:06,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967693059] [2021-11-03 04:34:06,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:06,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:06,624 INFO L87 Difference]: Start difference. First operand 987 states and 1426 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:06,796 INFO L93 Difference]: Finished difference Result 2710 states and 3910 transitions. [2021-11-03 04:34:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-03 04:34:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:06,808 INFO L225 Difference]: With dead ends: 2710 [2021-11-03 04:34:06,809 INFO L226 Difference]: Without dead ends: 1749 [2021-11-03 04:34:06,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-11-03 04:34:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1747. [2021-11-03 04:34:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.4278350515463918) internal successors, (2493), 1746 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2493 transitions. [2021-11-03 04:34:06,986 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2493 transitions. Word has length 101 [2021-11-03 04:34:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:06,987 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 2493 transitions. [2021-11-03 04:34:06,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2493 transitions. [2021-11-03 04:34:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-03 04:34:06,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:07,000 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] [2021-11-03 04:34:07,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:34:07,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash 673895576, now seen corresponding path program 1 times [2021-11-03 04:34:07,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:07,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786554017] [2021-11-03 04:34:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:07,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:07,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:07,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786554017] [2021-11-03 04:34:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786554017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:07,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:07,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:07,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428337876] [2021-11-03 04:34:07,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:07,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:07,230 INFO L87 Difference]: Start difference. First operand 1747 states and 2493 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:07,527 INFO L93 Difference]: Finished difference Result 4792 states and 6816 transitions. [2021-11-03 04:34:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-03 04:34:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:07,549 INFO L225 Difference]: With dead ends: 4792 [2021-11-03 04:34:07,550 INFO L226 Difference]: Without dead ends: 3077 [2021-11-03 04:34:07,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-11-03 04:34:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 3075. [2021-11-03 04:34:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3074 states have (on average 1.4040338321405335) internal successors, (4316), 3074 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 4316 transitions. [2021-11-03 04:34:07,839 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 4316 transitions. Word has length 110 [2021-11-03 04:34:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:07,839 INFO L470 AbstractCegarLoop]: Abstraction has 3075 states and 4316 transitions. [2021-11-03 04:34:07,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 4316 transitions. [2021-11-03 04:34:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-03 04:34:07,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:07,850 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] [2021-11-03 04:34:07,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:34:07,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:07,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1685099271, now seen corresponding path program 1 times [2021-11-03 04:34:07,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:07,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422763871] [2021-11-03 04:34:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:07,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:08,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:08,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422763871] [2021-11-03 04:34:08,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422763871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:08,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:08,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754201023] [2021-11-03 04:34:08,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:08,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:08,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:08,128 INFO L87 Difference]: Start difference. First operand 3075 states and 4316 transitions. Second operand has 4 states, 4 states have (on average 29.75) 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) [2021-11-03 04:34:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:08,631 INFO L93 Difference]: Finished difference Result 6225 states and 8747 transitions. [2021-11-03 04:34:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) 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 [2021-11-03 04:34:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:08,655 INFO L225 Difference]: With dead ends: 6225 [2021-11-03 04:34:08,655 INFO L226 Difference]: Without dead ends: 3187 [2021-11-03 04:34:08,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-11-03 04:34:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3185. [2021-11-03 04:34:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.403894472361809) internal successors, (4470), 3184 states have internal predecessors, (4470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4470 transitions. [2021-11-03 04:34:08,958 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4470 transitions. Word has length 119 [2021-11-03 04:34:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:08,958 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 4470 transitions. [2021-11-03 04:34:08,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) 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) [2021-11-03 04:34:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4470 transitions. [2021-11-03 04:34:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-03 04:34:08,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:08,970 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] [2021-11-03 04:34:08,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:34:08,971 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:08,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1412112974, now seen corresponding path program 1 times [2021-11-03 04:34:08,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:08,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368193226] [2021-11-03 04:34:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:08,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:09,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:09,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368193226] [2021-11-03 04:34:09,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368193226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:09,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:09,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:09,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554937112] [2021-11-03 04:34:09,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:09,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:09,089 INFO L87 Difference]: Start difference. First operand 3185 states and 4470 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:09,458 INFO L93 Difference]: Finished difference Result 7706 states and 10837 transitions. [2021-11-03 04:34:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-03 04:34:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:09,485 INFO L225 Difference]: With dead ends: 7706 [2021-11-03 04:34:09,486 INFO L226 Difference]: Without dead ends: 4557 [2021-11-03 04:34:09,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-11-03 04:34:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 4555. [2021-11-03 04:34:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 1.3932806324110671) internal successors, (6345), 4554 states have internal predecessors, (6345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 6345 transitions. [2021-11-03 04:34:09,819 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 6345 transitions. Word has length 121 [2021-11-03 04:34:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:09,820 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 6345 transitions. [2021-11-03 04:34:09,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 6345 transitions. [2021-11-03 04:34:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:09,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:09,831 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] [2021-11-03 04:34:09,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:34:09,831 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1603487407, now seen corresponding path program 1 times [2021-11-03 04:34:09,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:09,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436854072] [2021-11-03 04:34:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:09,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:09,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:09,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436854072] [2021-11-03 04:34:09,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436854072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:09,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:09,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:09,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186003386] [2021-11-03 04:34:09,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:09,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:09,900 INFO L87 Difference]: Start difference. First operand 4555 states and 6345 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:10,657 INFO L93 Difference]: Finished difference Result 11386 states and 15801 transitions. [2021-11-03 04:34:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:10,707 INFO L225 Difference]: With dead ends: 11386 [2021-11-03 04:34:10,708 INFO L226 Difference]: Without dead ends: 7571 [2021-11-03 04:34:10,716 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 [2021-11-03 04:34:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7571 states. [2021-11-03 04:34:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7571 to 7569. [2021-11-03 04:34:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7569 states, 7568 states have (on average 1.3753964059196617) internal successors, (10409), 7568 states have internal predecessors, (10409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7569 states to 7569 states and 10409 transitions. [2021-11-03 04:34:11,388 INFO L78 Accepts]: Start accepts. Automaton has 7569 states and 10409 transitions. Word has length 122 [2021-11-03 04:34:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:11,389 INFO L470 AbstractCegarLoop]: Abstraction has 7569 states and 10409 transitions. [2021-11-03 04:34:11,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 7569 states and 10409 transitions. [2021-11-03 04:34:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:11,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:11,410 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] [2021-11-03 04:34:11,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:34:11,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash -303749332, now seen corresponding path program 1 times [2021-11-03 04:34:11,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:11,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936200473] [2021-11-03 04:34:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:11,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:11,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:11,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936200473] [2021-11-03 04:34:11,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936200473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:11,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:11,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:11,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762531242] [2021-11-03 04:34:11,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:11,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:11,489 INFO L87 Difference]: Start difference. First operand 7569 states and 10409 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:12,640 INFO L93 Difference]: Finished difference Result 21550 states and 29573 transitions. [2021-11-03 04:34:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:12,713 INFO L225 Difference]: With dead ends: 21550 [2021-11-03 04:34:12,714 INFO L226 Difference]: Without dead ends: 14958 [2021-11-03 04:34:12,730 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 [2021-11-03 04:34:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14958 states. [2021-11-03 04:34:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14958 to 14956. [2021-11-03 04:34:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14956 states, 14955 states have (on average 1.3605483116014712) internal successors, (20347), 14955 states have internal predecessors, (20347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14956 states to 14956 states and 20347 transitions. [2021-11-03 04:34:13,860 INFO L78 Accepts]: Start accepts. Automaton has 14956 states and 20347 transitions. Word has length 122 [2021-11-03 04:34:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:13,860 INFO L470 AbstractCegarLoop]: Abstraction has 14956 states and 20347 transitions. [2021-11-03 04:34:13,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14956 states and 20347 transitions. [2021-11-03 04:34:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:13,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:13,909 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] [2021-11-03 04:34:13,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:34:13,910 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash 618691084, now seen corresponding path program 1 times [2021-11-03 04:34:13,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:13,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185609086] [2021-11-03 04:34:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:13,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:14,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:14,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185609086] [2021-11-03 04:34:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185609086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:14,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:14,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:14,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712958025] [2021-11-03 04:34:14,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:14,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:14,112 INFO L87 Difference]: Start difference. First operand 14956 states and 20347 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:15,641 INFO L93 Difference]: Finished difference Result 36192 states and 49403 transitions. [2021-11-03 04:34:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:15,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:15,698 INFO L225 Difference]: With dead ends: 36192 [2021-11-03 04:34:15,699 INFO L226 Difference]: Without dead ends: 21266 [2021-11-03 04:34:15,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21266 states. [2021-11-03 04:34:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21266 to 21264. [2021-11-03 04:34:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21264 states, 21263 states have (on average 1.3558293749706063) internal successors, (28829), 21263 states have internal predecessors, (28829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21264 states to 21264 states and 28829 transitions. [2021-11-03 04:34:16,884 INFO L78 Accepts]: Start accepts. Automaton has 21264 states and 28829 transitions. Word has length 122 [2021-11-03 04:34:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:16,885 INFO L470 AbstractCegarLoop]: Abstraction has 21264 states and 28829 transitions. [2021-11-03 04:34:16,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21264 states and 28829 transitions. [2021-11-03 04:34:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:16,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:16,936 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] [2021-11-03 04:34:16,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:34:16,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash 497401558, now seen corresponding path program 1 times [2021-11-03 04:34:16,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:16,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166445599] [2021-11-03 04:34:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:16,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:17,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:17,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166445599] [2021-11-03 04:34:17,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166445599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:17,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:17,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:17,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72759774] [2021-11-03 04:34:17,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:17,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:17,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:17,084 INFO L87 Difference]: Start difference. First operand 21264 states and 28829 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:18,671 INFO L93 Difference]: Finished difference Result 33144 states and 45097 transitions. [2021-11-03 04:34:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:18,723 INFO L225 Difference]: With dead ends: 33144 [2021-11-03 04:34:18,723 INFO L226 Difference]: Without dead ends: 16643 [2021-11-03 04:34:18,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16643 states. [2021-11-03 04:34:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16643 to 16641. [2021-11-03 04:34:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16641 states, 16640 states have (on average 1.3592548076923077) internal successors, (22618), 16640 states have internal predecessors, (22618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16641 states to 16641 states and 22618 transitions. [2021-11-03 04:34:19,758 INFO L78 Accepts]: Start accepts. Automaton has 16641 states and 22618 transitions. Word has length 122 [2021-11-03 04:34:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:19,759 INFO L470 AbstractCegarLoop]: Abstraction has 16641 states and 22618 transitions. [2021-11-03 04:34:19,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 16641 states and 22618 transitions. [2021-11-03 04:34:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:19,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:19,793 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] [2021-11-03 04:34:19,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 04:34:19,794 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -535097568, now seen corresponding path program 1 times [2021-11-03 04:34:19,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:19,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237967063] [2021-11-03 04:34:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:19,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:19,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:19,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237967063] [2021-11-03 04:34:19,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237967063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:19,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:19,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:19,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402757451] [2021-11-03 04:34:19,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:19,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:19,909 INFO L87 Difference]: Start difference. First operand 16641 states and 22618 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:21,432 INFO L93 Difference]: Finished difference Result 41192 states and 56180 transitions. [2021-11-03 04:34:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:21,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:21,490 INFO L225 Difference]: With dead ends: 41192 [2021-11-03 04:34:21,491 INFO L226 Difference]: Without dead ends: 24563 [2021-11-03 04:34:21,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24563 states. [2021-11-03 04:34:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24563 to 24561. [2021-11-03 04:34:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24561 states, 24560 states have (on average 1.3563110749185667) internal successors, (33311), 24560 states have internal predecessors, (33311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24561 states to 24561 states and 33311 transitions. [2021-11-03 04:34:22,659 INFO L78 Accepts]: Start accepts. Automaton has 24561 states and 33311 transitions. Word has length 122 [2021-11-03 04:34:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:22,660 INFO L470 AbstractCegarLoop]: Abstraction has 24561 states and 33311 transitions. [2021-11-03 04:34:22,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24561 states and 33311 transitions. [2021-11-03 04:34:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:22,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:22,704 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] [2021-11-03 04:34:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 04:34:22,705 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash -55363434, now seen corresponding path program 1 times [2021-11-03 04:34:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:22,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283225551] [2021-11-03 04:34:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:22,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:22,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:22,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283225551] [2021-11-03 04:34:22,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283225551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:22,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:22,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:22,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773284532] [2021-11-03 04:34:22,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:22,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:22,834 INFO L87 Difference]: Start difference. First operand 24561 states and 33311 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:24,887 INFO L93 Difference]: Finished difference Result 59696 states and 81350 transitions. [2021-11-03 04:34:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:24,973 INFO L225 Difference]: With dead ends: 59696 [2021-11-03 04:34:24,973 INFO L226 Difference]: Without dead ends: 35171 [2021-11-03 04:34:25,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35171 states. [2021-11-03 04:34:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35171 to 35169. [2021-11-03 04:34:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35169 states, 35168 states have (on average 1.3538159690627845) internal successors, (47611), 35168 states have internal predecessors, (47611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35169 states to 35169 states and 47611 transitions. [2021-11-03 04:34:26,619 INFO L78 Accepts]: Start accepts. Automaton has 35169 states and 47611 transitions. Word has length 122 [2021-11-03 04:34:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:26,620 INFO L470 AbstractCegarLoop]: Abstraction has 35169 states and 47611 transitions. [2021-11-03 04:34:26,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35169 states and 47611 transitions. [2021-11-03 04:34:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:26,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:26,674 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] [2021-11-03 04:34:26,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 04:34:26,675 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1331673915, now seen corresponding path program 1 times [2021-11-03 04:34:26,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:26,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407955617] [2021-11-03 04:34:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:26,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:26,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:26,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407955617] [2021-11-03 04:34:26,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407955617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:26,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:26,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:26,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334159647] [2021-11-03 04:34:26,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:26,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:26,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:26,773 INFO L87 Difference]: Start difference. First operand 35169 states and 47611 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:28,208 INFO L93 Difference]: Finished difference Result 47485 states and 64569 transitions. [2021-11-03 04:34:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:28,243 INFO L225 Difference]: With dead ends: 47485 [2021-11-03 04:34:28,243 INFO L226 Difference]: Without dead ends: 17338 [2021-11-03 04:34:28,265 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 [2021-11-03 04:34:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17338 states. [2021-11-03 04:34:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17338 to 11905. [2021-11-03 04:34:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11905 states, 11904 states have (on average 1.3591229838709677) internal successors, (16179), 11904 states have internal predecessors, (16179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11905 states to 11905 states and 16179 transitions. [2021-11-03 04:34:28,983 INFO L78 Accepts]: Start accepts. Automaton has 11905 states and 16179 transitions. Word has length 122 [2021-11-03 04:34:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:28,983 INFO L470 AbstractCegarLoop]: Abstraction has 11905 states and 16179 transitions. [2021-11-03 04:34:28,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 11905 states and 16179 transitions. [2021-11-03 04:34:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:28,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:28,991 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] [2021-11-03 04:34:28,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 04:34:28,992 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1662551403, now seen corresponding path program 1 times [2021-11-03 04:34:28,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:28,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88947965] [2021-11-03 04:34:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:28,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:29,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:29,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88947965] [2021-11-03 04:34:29,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88947965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:29,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:29,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:29,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789333995] [2021-11-03 04:34:29,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:29,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:29,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:29,074 INFO L87 Difference]: Start difference. First operand 11905 states and 16179 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:29,435 INFO L93 Difference]: Finished difference Result 14726 states and 20042 transitions. [2021-11-03 04:34:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:29,442 INFO L225 Difference]: With dead ends: 14726 [2021-11-03 04:34:29,442 INFO L226 Difference]: Without dead ends: 3995 [2021-11-03 04:34:29,456 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 [2021-11-03 04:34:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-03 04:34:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3993. [2021-11-03 04:34:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 1.342434869739479) internal successors, (5359), 3992 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 5359 transitions. [2021-11-03 04:34:29,670 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 5359 transitions. Word has length 122 [2021-11-03 04:34:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:29,670 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 5359 transitions. [2021-11-03 04:34:29,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 5359 transitions. [2021-11-03 04:34:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:29,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:29,675 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] [2021-11-03 04:34:29,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 04:34:29,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1460183697, now seen corresponding path program 1 times [2021-11-03 04:34:29,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:29,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072547434] [2021-11-03 04:34:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:29,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:29,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:29,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072547434] [2021-11-03 04:34:29,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072547434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:29,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:29,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:29,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347366825] [2021-11-03 04:34:29,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:29,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:29,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:29,767 INFO L87 Difference]: Start difference. First operand 3993 states and 5359 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:29,873 INFO L93 Difference]: Finished difference Result 4864 states and 6540 transitions. [2021-11-03 04:34:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:29,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:29,875 INFO L225 Difference]: With dead ends: 4864 [2021-11-03 04:34:29,875 INFO L226 Difference]: Without dead ends: 1406 [2021-11-03 04:34:29,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-11-03 04:34:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1404. [2021-11-03 04:34:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 1.3214540270848183) internal successors, (1854), 1403 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1854 transitions. [2021-11-03 04:34:29,935 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1854 transitions. Word has length 122 [2021-11-03 04:34:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:29,935 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1854 transitions. [2021-11-03 04:34:29,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1854 transitions. [2021-11-03 04:34:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:29,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:29,937 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] [2021-11-03 04:34:29,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 04:34:29,937 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:29,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1796351931, now seen corresponding path program 1 times [2021-11-03 04:34:29,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:29,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400449791] [2021-11-03 04:34:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:29,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:30,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:30,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400449791] [2021-11-03 04:34:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400449791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:30,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:30,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:30,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486515234] [2021-11-03 04:34:30,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:30,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:30,016 INFO L87 Difference]: Start difference. First operand 1404 states and 1854 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:30,080 INFO L93 Difference]: Finished difference Result 1947 states and 2575 transitions. [2021-11-03 04:34:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:30,082 INFO L225 Difference]: With dead ends: 1947 [2021-11-03 04:34:30,082 INFO L226 Difference]: Without dead ends: 733 [2021-11-03 04:34:30,083 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 [2021-11-03 04:34:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-03 04:34:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2021-11-03 04:34:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.2945205479452055) internal successors, (945), 730 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 945 transitions. [2021-11-03 04:34:30,198 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 945 transitions. Word has length 122 [2021-11-03 04:34:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:30,199 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 945 transitions. [2021-11-03 04:34:30,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 945 transitions. [2021-11-03 04:34:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:30,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:30,201 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] [2021-11-03 04:34:30,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 04:34:30,202 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2065946524, now seen corresponding path program 1 times [2021-11-03 04:34:30,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:30,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851047749] [2021-11-03 04:34:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:30,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:30,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:30,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851047749] [2021-11-03 04:34:30,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851047749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:30,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:30,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 04:34:30,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140559490] [2021-11-03 04:34:30,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:34:30,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:34:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:34:30,468 INFO L87 Difference]: Start difference. First operand 731 states and 945 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:31,340 INFO L93 Difference]: Finished difference Result 2865 states and 3678 transitions. [2021-11-03 04:34:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:34:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:31,344 INFO L225 Difference]: With dead ends: 2865 [2021-11-03 04:34:31,344 INFO L226 Difference]: Without dead ends: 2146 [2021-11-03 04:34:31,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:34:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-11-03 04:34:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1056. [2021-11-03 04:34:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.2691943127962084) internal successors, (1339), 1055 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1339 transitions. [2021-11-03 04:34:31,480 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1339 transitions. Word has length 122 [2021-11-03 04:34:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:31,481 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1339 transitions. [2021-11-03 04:34:31,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1339 transitions. [2021-11-03 04:34:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:31,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:31,483 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] [2021-11-03 04:34:31,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 04:34:31,483 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:31,484 INFO L85 PathProgramCache]: Analyzing trace with hash -618916929, now seen corresponding path program 1 times [2021-11-03 04:34:31,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:31,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081504834] [2021-11-03 04:34:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:31,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:31,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:31,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081504834] [2021-11-03 04:34:31,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081504834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:31,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:31,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:31,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890356487] [2021-11-03 04:34:31,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:31,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:31,590 INFO L87 Difference]: Start difference. First operand 1056 states and 1339 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:31,809 INFO L93 Difference]: Finished difference Result 1613 states and 2057 transitions. [2021-11-03 04:34:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:31,811 INFO L225 Difference]: With dead ends: 1613 [2021-11-03 04:34:31,811 INFO L226 Difference]: Without dead ends: 746 [2021-11-03 04:34:31,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-11-03 04:34:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 730. [2021-11-03 04:34:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.2661179698216736) internal successors, (923), 729 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 923 transitions. [2021-11-03 04:34:31,879 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 923 transitions. Word has length 122 [2021-11-03 04:34:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:31,879 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 923 transitions. [2021-11-03 04:34:31,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 923 transitions. [2021-11-03 04:34:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:31,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:31,881 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] [2021-11-03 04:34:31,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 04:34:31,881 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash -949249655, now seen corresponding path program 1 times [2021-11-03 04:34:31,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:31,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258457302] [2021-11-03 04:34:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:31,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:32,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:32,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258457302] [2021-11-03 04:34:32,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258457302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:32,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:32,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:34:32,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939217840] [2021-11-03 04:34:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:34:32,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:34:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:32,035 INFO L87 Difference]: Start difference. First operand 730 states and 923 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:32,281 INFO L93 Difference]: Finished difference Result 1301 states and 1653 transitions. [2021-11-03 04:34:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:32,282 INFO L225 Difference]: With dead ends: 1301 [2021-11-03 04:34:32,282 INFO L226 Difference]: Without dead ends: 720 [2021-11-03 04:34:32,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-03 04:34:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2021-11-03 04:34:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.2559109874826146) internal successors, (903), 719 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 903 transitions. [2021-11-03 04:34:32,343 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 903 transitions. Word has length 122 [2021-11-03 04:34:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:32,343 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 903 transitions. [2021-11-03 04:34:32,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 903 transitions. [2021-11-03 04:34:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:32,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:32,345 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] [2021-11-03 04:34:32,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 04:34:32,345 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2118508033, now seen corresponding path program 1 times [2021-11-03 04:34:32,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:32,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143645438] [2021-11-03 04:34:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:32,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:32,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:32,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143645438] [2021-11-03 04:34:32,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143645438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:32,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:32,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:32,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696627691] [2021-11-03 04:34:32,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:32,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:32,462 INFO L87 Difference]: Start difference. First operand 720 states and 903 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:32,659 INFO L93 Difference]: Finished difference Result 1014 states and 1280 transitions. [2021-11-03 04:34:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:32,661 INFO L225 Difference]: With dead ends: 1014 [2021-11-03 04:34:32,662 INFO L226 Difference]: Without dead ends: 720 [2021-11-03 04:34:32,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-03 04:34:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 539. [2021-11-03 04:34:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.2342007434944238) internal successors, (664), 538 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 664 transitions. [2021-11-03 04:34:32,744 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 664 transitions. Word has length 122 [2021-11-03 04:34:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:32,745 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 664 transitions. [2021-11-03 04:34:32,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 664 transitions. [2021-11-03 04:34:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:34:32,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:32,747 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] [2021-11-03 04:34:32,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 04:34:32,747 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1075215433, now seen corresponding path program 1 times [2021-11-03 04:34:32,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:32,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221252647] [2021-11-03 04:34:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:32,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221252647] [2021-11-03 04:34:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221252647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:33,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:33,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:34:33,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940915358] [2021-11-03 04:34:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:33,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:33,059 INFO L87 Difference]: Start difference. First operand 539 states and 664 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:33,145 INFO L93 Difference]: Finished difference Result 977 states and 1205 transitions. [2021-11-03 04:34:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:34:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:33,147 INFO L225 Difference]: With dead ends: 977 [2021-11-03 04:34:33,147 INFO L226 Difference]: Without dead ends: 539 [2021-11-03 04:34:33,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-03 04:34:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-03 04:34:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.2193308550185873) internal successors, (656), 538 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 656 transitions. [2021-11-03 04:34:33,212 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 656 transitions. Word has length 122 [2021-11-03 04:34:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:33,212 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 656 transitions. [2021-11-03 04:34:33,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 656 transitions. [2021-11-03 04:34:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-03 04:34:33,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:33,214 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] [2021-11-03 04:34:33,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 04:34:33,214 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1115668327, now seen corresponding path program 1 times [2021-11-03 04:34:33,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:33,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171489002] [2021-11-03 04:34:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:33,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171489002] [2021-11-03 04:34:33,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171489002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:33,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:33,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:33,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300757665] [2021-11-03 04:34:33,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:33,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:33,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:33,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:33,289 INFO L87 Difference]: Start difference. First operand 539 states and 656 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:33,455 INFO L93 Difference]: Finished difference Result 979 states and 1196 transitions. [2021-11-03 04:34:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-03 04:34:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:33,457 INFO L225 Difference]: With dead ends: 979 [2021-11-03 04:34:33,457 INFO L226 Difference]: Without dead ends: 699 [2021-11-03 04:34:33,458 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 [2021-11-03 04:34:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-03 04:34:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 669. [2021-11-03 04:34:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 1.2095808383233533) internal successors, (808), 668 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 808 transitions. [2021-11-03 04:34:33,550 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 808 transitions. Word has length 124 [2021-11-03 04:34:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:33,550 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 808 transitions. [2021-11-03 04:34:33,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 808 transitions. [2021-11-03 04:34:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-03 04:34:33,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:33,552 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] [2021-11-03 04:34:33,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-03 04:34:33,553 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 50659523, now seen corresponding path program 1 times [2021-11-03 04:34:33,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:33,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054357866] [2021-11-03 04:34:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:33,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:33,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054357866] [2021-11-03 04:34:33,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054357866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:33,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:33,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:33,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515214575] [2021-11-03 04:34:33,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:33,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:33,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:33,630 INFO L87 Difference]: Start difference. First operand 669 states and 808 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:33,702 INFO L93 Difference]: Finished difference Result 909 states and 1100 transitions. [2021-11-03 04:34:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-03 04:34:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:33,703 INFO L225 Difference]: With dead ends: 909 [2021-11-03 04:34:33,703 INFO L226 Difference]: Without dead ends: 376 [2021-11-03 04:34:33,704 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 [2021-11-03 04:34:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-03 04:34:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2021-11-03 04:34:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.1769436997319034) internal successors, (439), 373 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 439 transitions. [2021-11-03 04:34:33,752 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 439 transitions. Word has length 124 [2021-11-03 04:34:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:33,753 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 439 transitions. [2021-11-03 04:34:33,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 439 transitions. [2021-11-03 04:34:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 04:34:33,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:33,754 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] [2021-11-03 04:34:33,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 04:34:33,754 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash -73959668, now seen corresponding path program 1 times [2021-11-03 04:34:33,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:33,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969746554] [2021-11-03 04:34:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:33,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:33,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969746554] [2021-11-03 04:34:33,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969746554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:33,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:33,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:34:33,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530240970] [2021-11-03 04:34:33,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:34:33,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:34:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:33,865 INFO L87 Difference]: Start difference. First operand 374 states and 439 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:33,961 INFO L93 Difference]: Finished difference Result 667 states and 789 transitions. [2021-11-03 04:34:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:34:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-03 04:34:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:33,962 INFO L225 Difference]: With dead ends: 667 [2021-11-03 04:34:33,962 INFO L226 Difference]: Without dead ends: 374 [2021-11-03 04:34:33,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-03 04:34:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2021-11-03 04:34:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.1662198391420913) internal successors, (435), 373 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 435 transitions. [2021-11-03 04:34:33,999 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 435 transitions. Word has length 126 [2021-11-03 04:34:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:33,999 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 435 transitions. [2021-11-03 04:34:33,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 435 transitions. [2021-11-03 04:34:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 04:34:34,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:34,001 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] [2021-11-03 04:34:34,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-03 04:34:34,001 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash -43141702, now seen corresponding path program 1 times [2021-11-03 04:34:34,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:34,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392962950] [2021-11-03 04:34:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:34,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:34,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:34,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392962950] [2021-11-03 04:34:34,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392962950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:34,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:34,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:34,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087833732] [2021-11-03 04:34:34,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:34,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:34,077 INFO L87 Difference]: Start difference. First operand 374 states and 435 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:34,191 INFO L93 Difference]: Finished difference Result 687 states and 808 transitions. [2021-11-03 04:34:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-03 04:34:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:34,192 INFO L225 Difference]: With dead ends: 687 [2021-11-03 04:34:34,192 INFO L226 Difference]: Without dead ends: 467 [2021-11-03 04:34:34,193 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 [2021-11-03 04:34:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-03 04:34:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 453. [2021-11-03 04:34:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.163716814159292) internal successors, (526), 452 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 526 transitions. [2021-11-03 04:34:34,251 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 526 transitions. Word has length 127 [2021-11-03 04:34:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:34,251 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 526 transitions. [2021-11-03 04:34:34,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 526 transitions. [2021-11-03 04:34:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:34:34,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:34,253 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] [2021-11-03 04:34:34,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 04:34:34,253 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1629894427, now seen corresponding path program 1 times [2021-11-03 04:34:34,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:34,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539696257] [2021-11-03 04:34:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:34,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:34,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:34,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539696257] [2021-11-03 04:34:34,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539696257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:34,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:34,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:34:34,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334344215] [2021-11-03 04:34:34,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:34:34,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:34:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:34:34,443 INFO L87 Difference]: Start difference. First operand 453 states and 526 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:34,532 INFO L93 Difference]: Finished difference Result 708 states and 832 transitions. [2021-11-03 04:34:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-03 04:34:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:34,534 INFO L225 Difference]: With dead ends: 708 [2021-11-03 04:34:34,535 INFO L226 Difference]: Without dead ends: 449 [2021-11-03 04:34:34,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-03 04:34:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2021-11-03 04:34:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.15625) internal successors, (518), 448 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 518 transitions. [2021-11-03 04:34:34,599 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 518 transitions. Word has length 128 [2021-11-03 04:34:34,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:34,600 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 518 transitions. [2021-11-03 04:34:34,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 518 transitions. [2021-11-03 04:34:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-03 04:34:34,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:34,602 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] [2021-11-03 04:34:34,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-03 04:34:34,602 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash -10637837, now seen corresponding path program 1 times [2021-11-03 04:34:34,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:34,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129165577] [2021-11-03 04:34:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:34,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:34,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:34,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129165577] [2021-11-03 04:34:34,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129165577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:34,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:34,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 04:34:34,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968088887] [2021-11-03 04:34:34,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:34:34,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:34:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:34:34,862 INFO L87 Difference]: Start difference. First operand 449 states and 518 transitions. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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) [2021-11-03 04:34:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:35,216 INFO L93 Difference]: Finished difference Result 896 states and 1051 transitions. [2021-11-03 04:34:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:34:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 [2021-11-03 04:34:35,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:35,219 INFO L225 Difference]: With dead ends: 896 [2021-11-03 04:34:35,219 INFO L226 Difference]: Without dead ends: 645 [2021-11-03 04:34:35,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:34:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-03 04:34:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 589. [2021-11-03 04:34:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.1564625850340136) internal successors, (680), 588 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 680 transitions. [2021-11-03 04:34:35,355 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 680 transitions. Word has length 132 [2021-11-03 04:34:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:35,355 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 680 transitions. [2021-11-03 04:34:35,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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) [2021-11-03 04:34:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 680 transitions. [2021-11-03 04:34:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 04:34:35,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:35,357 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] [2021-11-03 04:34:35,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-03 04:34:35,357 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:35,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1242011305, now seen corresponding path program 1 times [2021-11-03 04:34:35,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:35,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683648437] [2021-11-03 04:34:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:35,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:35,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:35,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683648437] [2021-11-03 04:34:35,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683648437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:35,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:35,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:34:35,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558314353] [2021-11-03 04:34:35,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:34:35,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:35,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:34:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:34:35,439 INFO L87 Difference]: Start difference. First operand 589 states and 680 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:35,547 INFO L93 Difference]: Finished difference Result 925 states and 1082 transitions. [2021-11-03 04:34:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:34:35,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-03 04:34:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:35,548 INFO L225 Difference]: With dead ends: 925 [2021-11-03 04:34:35,549 INFO L226 Difference]: Without dead ends: 605 [2021-11-03 04:34:35,550 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 [2021-11-03 04:34:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-03 04:34:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 591. [2021-11-03 04:34:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.152542372881356) internal successors, (680), 590 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 680 transitions. [2021-11-03 04:34:35,628 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 680 transitions. Word has length 133 [2021-11-03 04:34:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:35,628 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 680 transitions. [2021-11-03 04:34:35,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 680 transitions. [2021-11-03 04:34:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:34:35,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:35,630 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] [2021-11-03 04:34:35,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-03 04:34:35,630 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash -221740836, now seen corresponding path program 1 times [2021-11-03 04:34:35,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:35,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810660476] [2021-11-03 04:34:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:35,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:35,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:35,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810660476] [2021-11-03 04:34:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810660476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:35,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:35,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:34:35,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053882929] [2021-11-03 04:34:35,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:35,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:34:35,753 INFO L87 Difference]: Start difference. First operand 591 states and 680 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:35,981 INFO L93 Difference]: Finished difference Result 724 states and 831 transitions. [2021-11-03 04:34:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:34:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:34:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:35,983 INFO L225 Difference]: With dead ends: 724 [2021-11-03 04:34:35,984 INFO L226 Difference]: Without dead ends: 722 [2021-11-03 04:34:35,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:34:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-03 04:34:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 591. [2021-11-03 04:34:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1491525423728814) internal successors, (678), 590 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 678 transitions. [2021-11-03 04:34:36,066 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 678 transitions. Word has length 134 [2021-11-03 04:34:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 678 transitions. [2021-11-03 04:34:36,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 678 transitions. [2021-11-03 04:34:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-03 04:34:36,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:36,068 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:36,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-03 04:34:36,069 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:36,069 INFO L85 PathProgramCache]: Analyzing trace with hash -61693573, now seen corresponding path program 1 times [2021-11-03 04:34:36,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:36,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687946110] [2021-11-03 04:34:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:36,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:34:36,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:34:36,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687946110] [2021-11-03 04:34:36,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687946110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:36,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:36,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 04:34:36,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620565606] [2021-11-03 04:34:36,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:36,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:34:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:34:36,349 INFO L87 Difference]: Start difference. First operand 591 states and 678 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:36,494 INFO L93 Difference]: Finished difference Result 998 states and 1154 transitions. [2021-11-03 04:34:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:34:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 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 147 [2021-11-03 04:34:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:36,496 INFO L225 Difference]: With dead ends: 998 [2021-11-03 04:34:36,496 INFO L226 Difference]: Without dead ends: 599 [2021-11-03 04:34:36,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:34:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-03 04:34:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 520. [2021-11-03 04:34:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.1464354527938343) internal successors, (595), 519 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 595 transitions. [2021-11-03 04:34:36,574 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 595 transitions. Word has length 147 [2021-11-03 04:34:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:36,574 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 595 transitions. [2021-11-03 04:34:36,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 595 transitions. [2021-11-03 04:34:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-03 04:34:36,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:36,576 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:36,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-03 04:34:36,576 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2104262514, now seen corresponding path program 1 times [2021-11-03 04:34:36,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:34:36,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053346571] [2021-11-03 04:34:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:36,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:34:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat