./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c39b660f273ecbdfa60a013e46dad0637949d26902d1f41ae3834ad8e3310564 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:33:25,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:33:25,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:33:25,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:33:25,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:33:25,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:33:25,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:33:25,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:33:25,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:33:25,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:33:25,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:33:25,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:33:25,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:33:25,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:33:25,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:33:25,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:33:25,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:33:25,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:33:26,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:33:26,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:33:26,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:33:26,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:33:26,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:33:26,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:33:26,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:33:26,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:33:26,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:33:26,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:33:26,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:33:26,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:33:26,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:33:26,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:33:26,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:33:26,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:33:26,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:33:26,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:33:26,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:33:26,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:33:26,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:33:26,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:33:26,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:33:26,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:33:26,067 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:33:26,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:33:26,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:33:26,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:33:26,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:33:26,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:33:26,069 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:33:26,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:33:26,069 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:33:26,069 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:33:26,070 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:33:26,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:33:26,070 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:33:26,070 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:33:26,070 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:33:26,071 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:33:26,071 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:33:26,071 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:33:26,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:33:26,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:33:26,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:33:26,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:33:26,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:33:26,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:33:26,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:33:26,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:33:26,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:33:26,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:33:26,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:33:26,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:33:26,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:33:26,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:33:26,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:33:26,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:33:26,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:33:26,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:33:26,075 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:33:26,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:33:26,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:33:26,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:33:26,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:33:26,076 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_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b660f273ecbdfa60a013e46dad0637949d26902d1f41ae3834ad8e3310564 [2021-11-21 00:33:26,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:33:26,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:33:26,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:33:26,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:33:26,456 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:33:26,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-21 00:33:26,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/data/99ad02c37/f4c8b5cdbe544be185c8324f2cacbef5/FLAG7a2286b3b [2021-11-21 00:33:27,126 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:33:27,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-21 00:33:27,137 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/data/99ad02c37/f4c8b5cdbe544be185c8324f2cacbef5/FLAG7a2286b3b [2021-11-21 00:33:27,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/data/99ad02c37/f4c8b5cdbe544be185c8324f2cacbef5 [2021-11-21 00:33:27,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:33:27,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:33:27,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:33:27,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:33:27,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:33:27,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:27,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575b0052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27, skipping insertion in model container [2021-11-21 00:33:27,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:27,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:33:27,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:33:27,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7469,7482] [2021-11-21 00:33:27,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:33:27,824 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:33:27,897 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7469,7482] [2021-11-21 00:33:27,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:33:27,974 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:33:27,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27 WrapperNode [2021-11-21 00:33:27,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:33:27,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:33:27,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:33:27,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:33:27,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,051 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 610 [2021-11-21 00:33:28,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:33:28,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:33:28,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:33:28,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:33:28,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:33:28,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:33:28,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:33:28,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:33:28,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (1/1) ... [2021-11-21 00:33:28,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:33:28,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:28,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:33:28,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:33:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:33:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:33:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:33:28,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:33:28,366 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:33:28,368 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:33:29,085 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:33:29,224 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:33:29,227 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:33:29,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:33:29 BoogieIcfgContainer [2021-11-21 00:33:29,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:33:29,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:33:29,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:33:29,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:33:29,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:33:27" (1/3) ... [2021-11-21 00:33:29,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cef4eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:33:29, skipping insertion in model container [2021-11-21 00:33:29,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:33:27" (2/3) ... [2021-11-21 00:33:29,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cef4eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:33:29, skipping insertion in model container [2021-11-21 00:33:29,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:33:29" (3/3) ... [2021-11-21 00:33:29,242 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-21 00:33:29,250 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:33:29,251 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:33:29,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:33:29,314 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:33:29,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:33:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 120 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 00:33:29,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:29,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:29,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -569731817, now seen corresponding path program 1 times [2021-11-21 00:33:29,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:29,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462841893] [2021-11-21 00:33:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:29,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:29,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462841893] [2021-11-21 00:33:29,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462841893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:29,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:29,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:33:29,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023464088] [2021-11-21 00:33:29,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:29,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:33:29,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:33:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:33:29,898 INFO L87 Difference]: Start difference. First operand has 121 states, 119 states have (on average 1.6890756302521008) internal successors, (201), 120 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:30,241 INFO L93 Difference]: Finished difference Result 328 states and 524 transitions. [2021-11-21 00:33:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:33:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-21 00:33:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:30,262 INFO L225 Difference]: With dead ends: 328 [2021-11-21 00:33:30,263 INFO L226 Difference]: Without dead ends: 244 [2021-11-21 00:33:30,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:33:30,272 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 362 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:30,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 692 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:33:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-21 00:33:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2021-11-21 00:33:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.3723849372384938) internal successors, (328), 239 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 328 transitions. [2021-11-21 00:33:30,378 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 328 transitions. Word has length 43 [2021-11-21 00:33:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:30,379 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 328 transitions. [2021-11-21 00:33:30,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 328 transitions. [2021-11-21 00:33:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:33:30,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:30,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:30,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:33:30,382 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1859584073, now seen corresponding path program 1 times [2021-11-21 00:33:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075595422] [2021-11-21 00:33:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:30,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:30,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075595422] [2021-11-21 00:33:30,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075595422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:30,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:30,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:33:30,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579345376] [2021-11-21 00:33:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:30,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:33:30,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:33:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:33:30,477 INFO L87 Difference]: Start difference. First operand 240 states and 328 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:30,748 INFO L93 Difference]: Finished difference Result 531 states and 737 transitions. [2021-11-21 00:33:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:33:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-21 00:33:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:30,753 INFO L225 Difference]: With dead ends: 531 [2021-11-21 00:33:30,754 INFO L226 Difference]: Without dead ends: 318 [2021-11-21 00:33:30,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:33:30,764 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 416 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:30,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 167 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:33:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-21 00:33:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2021-11-21 00:33:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.3746031746031746) internal successors, (433), 315 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 433 transitions. [2021-11-21 00:33:30,818 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 433 transitions. Word has length 44 [2021-11-21 00:33:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:30,820 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 433 transitions. [2021-11-21 00:33:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 433 transitions. [2021-11-21 00:33:30,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:33:30,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:30,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:30,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:33:30,826 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1490531816, now seen corresponding path program 1 times [2021-11-21 00:33:30,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:30,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584136582] [2021-11-21 00:33:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:30,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:30,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:30,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584136582] [2021-11-21 00:33:30,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584136582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:30,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:30,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:33:30,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030080322] [2021-11-21 00:33:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:30,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:33:30,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:33:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:33:30,947 INFO L87 Difference]: Start difference. First operand 316 states and 433 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:31,236 INFO L93 Difference]: Finished difference Result 765 states and 1070 transitions. [2021-11-21 00:33:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:33:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-21 00:33:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:31,240 INFO L225 Difference]: With dead ends: 765 [2021-11-21 00:33:31,240 INFO L226 Difference]: Without dead ends: 492 [2021-11-21 00:33:31,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:33:31,243 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 395 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:31,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 178 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:33:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-21 00:33:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2021-11-21 00:33:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.3865030674846626) internal successors, (678), 489 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) [2021-11-21 00:33:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 678 transitions. [2021-11-21 00:33:31,296 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 678 transitions. Word has length 44 [2021-11-21 00:33:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:31,296 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 678 transitions. [2021-11-21 00:33:31,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 678 transitions. [2021-11-21 00:33:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:33:31,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:31,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:31,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:33:31,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash -448842201, now seen corresponding path program 1 times [2021-11-21 00:33:31,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:31,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480948157] [2021-11-21 00:33:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:31,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:31,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:31,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480948157] [2021-11-21 00:33:31,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480948157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:31,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:31,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:33:31,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114533516] [2021-11-21 00:33:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:33:31,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:33:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:33:31,411 INFO L87 Difference]: Start difference. First operand 490 states and 678 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:31,733 INFO L93 Difference]: Finished difference Result 1267 states and 1784 transitions. [2021-11-21 00:33:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:33:31,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-21 00:33:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:31,742 INFO L225 Difference]: With dead ends: 1267 [2021-11-21 00:33:31,743 INFO L226 Difference]: Without dead ends: 840 [2021-11-21 00:33:31,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:33:31,755 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 378 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:31,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 186 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:33:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-21 00:33:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2021-11-21 00:33:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 1.3954599761051374) internal successors, (1168), 837 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1168 transitions. [2021-11-21 00:33:31,876 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1168 transitions. Word has length 44 [2021-11-21 00:33:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:31,878 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1168 transitions. [2021-11-21 00:33:31,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1168 transitions. [2021-11-21 00:33:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:33:31,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:31,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:31,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:33:31,887 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1500601899, now seen corresponding path program 1 times [2021-11-21 00:33:31,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:31,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266859134] [2021-11-21 00:33:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:31,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:32,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:32,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266859134] [2021-11-21 00:33:32,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266859134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:32,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:32,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-21 00:33:32,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922386401] [2021-11-21 00:33:32,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:32,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:33:32,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:33:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:33:32,211 INFO L87 Difference]: Start difference. First operand 838 states and 1168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:33,248 INFO L93 Difference]: Finished difference Result 4663 states and 6639 transitions. [2021-11-21 00:33:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:33:33,249 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-21 00:33:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:33,274 INFO L225 Difference]: With dead ends: 4663 [2021-11-21 00:33:33,274 INFO L226 Difference]: Without dead ends: 3965 [2021-11-21 00:33:33,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:33:33,278 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1471 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:33,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 691 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:33:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2021-11-21 00:33:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 2483. [2021-11-21 00:33:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 1.3924254633360194) internal successors, (3456), 2482 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3456 transitions. [2021-11-21 00:33:33,646 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3456 transitions. Word has length 45 [2021-11-21 00:33:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:33,648 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3456 transitions. [2021-11-21 00:33:33,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3456 transitions. [2021-11-21 00:33:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:33:33,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:33,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:33,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:33:33,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:33,659 INFO L85 PathProgramCache]: Analyzing trace with hash 331686411, now seen corresponding path program 1 times [2021-11-21 00:33:33,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:33,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989101558] [2021-11-21 00:33:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:33,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:34,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:34,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989101558] [2021-11-21 00:33:34,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989101558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:34,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:34,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-21 00:33:34,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449347443] [2021-11-21 00:33:34,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:34,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:33:34,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:34,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:33:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:33:34,006 INFO L87 Difference]: Start difference. First operand 2483 states and 3456 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:34,974 INFO L93 Difference]: Finished difference Result 4263 states and 5980 transitions. [2021-11-21 00:33:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:33:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-21 00:33:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:34,999 INFO L225 Difference]: With dead ends: 4263 [2021-11-21 00:33:35,000 INFO L226 Difference]: Without dead ends: 3787 [2021-11-21 00:33:35,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:33:35,003 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1302 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:35,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 871 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:33:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2021-11-21 00:33:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3067. [2021-11-21 00:33:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 1.3842139595564253) internal successors, (4244), 3066 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 4244 transitions. [2021-11-21 00:33:35,393 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 4244 transitions. Word has length 45 [2021-11-21 00:33:35,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:35,393 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 4244 transitions. [2021-11-21 00:33:35,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 4244 transitions. [2021-11-21 00:33:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:33:35,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:35,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:35,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:33:35,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2052968981, now seen corresponding path program 1 times [2021-11-21 00:33:35,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:35,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585917945] [2021-11-21 00:33:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:35,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:35,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:35,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585917945] [2021-11-21 00:33:35,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585917945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:35,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:35,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-21 00:33:35,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904441033] [2021-11-21 00:33:35,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:35,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:33:35,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:33:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:33:35,629 INFO L87 Difference]: Start difference. First operand 3067 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:36,836 INFO L93 Difference]: Finished difference Result 4801 states and 6657 transitions. [2021-11-21 00:33:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:33:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-21 00:33:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:36,865 INFO L225 Difference]: With dead ends: 4801 [2021-11-21 00:33:36,866 INFO L226 Difference]: Without dead ends: 4639 [2021-11-21 00:33:36,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:33:36,869 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1093 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:36,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1074 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:33:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-11-21 00:33:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3520. [2021-11-21 00:33:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 1.3813583404376244) internal successors, (4861), 3519 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4861 transitions. [2021-11-21 00:33:37,283 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4861 transitions. Word has length 45 [2021-11-21 00:33:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 4861 transitions. [2021-11-21 00:33:37,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4861 transitions. [2021-11-21 00:33:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:33:37,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:37,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:37,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:33:37,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1352529439, now seen corresponding path program 1 times [2021-11-21 00:33:37,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:37,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172431002] [2021-11-21 00:33:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:37,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:37,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:37,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172431002] [2021-11-21 00:33:37,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172431002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:37,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:37,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 00:33:37,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391330112] [2021-11-21 00:33:37,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:37,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:33:37,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:33:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:33:37,634 INFO L87 Difference]: Start difference. First operand 3520 states and 4861 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:38,502 INFO L93 Difference]: Finished difference Result 5547 states and 7680 transitions. [2021-11-21 00:33:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:33:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-21 00:33:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:38,546 INFO L225 Difference]: With dead ends: 5547 [2021-11-21 00:33:38,546 INFO L226 Difference]: Without dead ends: 5097 [2021-11-21 00:33:38,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:33:38,553 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 503 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:38,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 852 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:33:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-11-21 00:33:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3811. [2021-11-21 00:33:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 1.3829396325459318) internal successors, (5269), 3810 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 5269 transitions. [2021-11-21 00:33:38,993 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 5269 transitions. Word has length 47 [2021-11-21 00:33:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:38,995 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 5269 transitions. [2021-11-21 00:33:38,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 5269 transitions. [2021-11-21 00:33:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:33:38,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:38,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:38,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:33:38,997 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1032125953, now seen corresponding path program 1 times [2021-11-21 00:33:38,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:38,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209892208] [2021-11-21 00:33:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:38,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:39,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209892208] [2021-11-21 00:33:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209892208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:39,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:39,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 00:33:39,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036010779] [2021-11-21 00:33:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:33:39,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:33:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:33:39,292 INFO L87 Difference]: Start difference. First operand 3811 states and 5269 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:40,445 INFO L93 Difference]: Finished difference Result 7067 states and 9812 transitions. [2021-11-21 00:33:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:33:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-21 00:33:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:40,483 INFO L225 Difference]: With dead ends: 7067 [2021-11-21 00:33:40,483 INFO L226 Difference]: Without dead ends: 6369 [2021-11-21 00:33:40,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:33:40,488 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 407 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:40,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 999 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:33:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2021-11-21 00:33:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 3838. [2021-11-21 00:33:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 1.3802449830596821) internal successors, (5296), 3837 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5296 transitions. [2021-11-21 00:33:40,996 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5296 transitions. Word has length 47 [2021-11-21 00:33:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:40,997 INFO L470 AbstractCegarLoop]: Abstraction has 3838 states and 5296 transitions. [2021-11-21 00:33:40,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5296 transitions. [2021-11-21 00:33:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:33:40,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:40,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:40,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:33:40,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash 921521631, now seen corresponding path program 1 times [2021-11-21 00:33:40,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:41,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505591429] [2021-11-21 00:33:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:41,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:41,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:41,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505591429] [2021-11-21 00:33:41,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505591429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:41,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:41,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 00:33:41,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52780890] [2021-11-21 00:33:41,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:41,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:33:41,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:41,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:33:41,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:33:41,294 INFO L87 Difference]: Start difference. First operand 3838 states and 5296 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:42,647 INFO L93 Difference]: Finished difference Result 8309 states and 11520 transitions. [2021-11-21 00:33:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:33:42,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-21 00:33:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:42,708 INFO L225 Difference]: With dead ends: 8309 [2021-11-21 00:33:42,709 INFO L226 Difference]: Without dead ends: 8155 [2021-11-21 00:33:42,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:33:42,712 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 494 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:42,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 1606 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:33:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2021-11-21 00:33:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 3841. [2021-11-21 00:33:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 1.3799479166666666) internal successors, (5299), 3840 states have internal predecessors, (5299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 5299 transitions. [2021-11-21 00:33:43,228 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 5299 transitions. Word has length 47 [2021-11-21 00:33:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:43,229 INFO L470 AbstractCegarLoop]: Abstraction has 3841 states and 5299 transitions. [2021-11-21 00:33:43,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 5299 transitions. [2021-11-21 00:33:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:33:43,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:43,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:43,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:33:43,231 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1395166925, now seen corresponding path program 1 times [2021-11-21 00:33:43,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:43,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733925347] [2021-11-21 00:33:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:43,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:43,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:43,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733925347] [2021-11-21 00:33:43,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733925347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:43,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:43,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:43,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241013128] [2021-11-21 00:33:43,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:43,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:43,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:43,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:43,271 INFO L87 Difference]: Start difference. First operand 3841 states and 5299 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:43,789 INFO L93 Difference]: Finished difference Result 6810 states and 9449 transitions. [2021-11-21 00:33:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:43,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-21 00:33:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:43,800 INFO L225 Difference]: With dead ends: 6810 [2021-11-21 00:33:43,800 INFO L226 Difference]: Without dead ends: 3651 [2021-11-21 00:33:43,806 INFO L932 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 [2021-11-21 00:33:43,807 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 85 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:43,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 271 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-11-21 00:33:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2021-11-21 00:33:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.377467105263158) internal successors, (5025), 3648 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5025 transitions. [2021-11-21 00:33:44,177 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5025 transitions. Word has length 48 [2021-11-21 00:33:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:44,178 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 5025 transitions. [2021-11-21 00:33:44,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:44,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5025 transitions. [2021-11-21 00:33:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:33:44,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:44,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:44,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:33:44,180 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1093497654, now seen corresponding path program 1 times [2021-11-21 00:33:44,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:44,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882107171] [2021-11-21 00:33:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:44,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:44,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882107171] [2021-11-21 00:33:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882107171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:44,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:44,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:44,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343290878] [2021-11-21 00:33:44,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:44,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:44,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:44,213 INFO L87 Difference]: Start difference. First operand 3649 states and 5025 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:44,533 INFO L93 Difference]: Finished difference Result 6537 states and 9060 transitions. [2021-11-21 00:33:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-21 00:33:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:44,539 INFO L225 Difference]: With dead ends: 6537 [2021-11-21 00:33:44,539 INFO L226 Difference]: Without dead ends: 3504 [2021-11-21 00:33:44,544 INFO L932 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 [2021-11-21 00:33:44,545 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 78 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:44,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 271 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-11-21 00:33:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3432. [2021-11-21 00:33:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3431 states have (on average 1.3762751384436025) internal successors, (4722), 3431 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 4722 transitions. [2021-11-21 00:33:44,887 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 4722 transitions. Word has length 48 [2021-11-21 00:33:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:44,887 INFO L470 AbstractCegarLoop]: Abstraction has 3432 states and 4722 transitions. [2021-11-21 00:33:44,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 4722 transitions. [2021-11-21 00:33:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 00:33:44,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:44,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:44,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:33:44,889 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1595839245, now seen corresponding path program 1 times [2021-11-21 00:33:44,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:44,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991645995] [2021-11-21 00:33:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:44,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:47,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991645995] [2021-11-21 00:33:47,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991645995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:47,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:47,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-21 00:33:47,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828533252] [2021-11-21 00:33:47,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:47,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 00:33:47,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 00:33:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:33:47,009 INFO L87 Difference]: Start difference. First operand 3432 states and 4722 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:51,286 INFO L93 Difference]: Finished difference Result 3922 states and 5398 transitions. [2021-11-21 00:33:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:33:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-21 00:33:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:51,298 INFO L225 Difference]: With dead ends: 3922 [2021-11-21 00:33:51,298 INFO L226 Difference]: Without dead ends: 3776 [2021-11-21 00:33:51,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=538, Invalid=1442, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:33:51,302 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 758 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:51,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 2576 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:33:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-11-21 00:33:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3438. [2021-11-21 00:33:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 1.3759092231597323) internal successors, (4729), 3437 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 4729 transitions. [2021-11-21 00:33:51,736 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 4729 transitions. Word has length 49 [2021-11-21 00:33:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:51,736 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 4729 transitions. [2021-11-21 00:33:51,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 4729 transitions. [2021-11-21 00:33:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:33:51,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:51,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:51,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:33:51,738 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1265773300, now seen corresponding path program 1 times [2021-11-21 00:33:51,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:51,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392529102] [2021-11-21 00:33:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:51,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:51,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392529102] [2021-11-21 00:33:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392529102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:51,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:51,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550899966] [2021-11-21 00:33:51,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:51,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:51,765 INFO L87 Difference]: Start difference. First operand 3438 states and 4729 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:52,077 INFO L93 Difference]: Finished difference Result 6058 states and 8367 transitions. [2021-11-21 00:33:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-21 00:33:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:52,088 INFO L225 Difference]: With dead ends: 6058 [2021-11-21 00:33:52,089 INFO L226 Difference]: Without dead ends: 3241 [2021-11-21 00:33:52,094 INFO L932 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 [2021-11-21 00:33:52,094 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 84 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:52,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 250 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2021-11-21 00:33:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 3239. [2021-11-21 00:33:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3238 states have (on average 1.3730697961704756) internal successors, (4446), 3238 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 4446 transitions. [2021-11-21 00:33:52,477 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 4446 transitions. Word has length 50 [2021-11-21 00:33:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:52,477 INFO L470 AbstractCegarLoop]: Abstraction has 3239 states and 4446 transitions. [2021-11-21 00:33:52,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 4446 transitions. [2021-11-21 00:33:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 00:33:52,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:52,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:52,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:33:52,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:52,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1911473133, now seen corresponding path program 1 times [2021-11-21 00:33:52,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496170707] [2021-11-21 00:33:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:52,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:52,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:52,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496170707] [2021-11-21 00:33:52,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496170707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:52,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:52,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:52,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527015136] [2021-11-21 00:33:52,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:52,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:52,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:52,524 INFO L87 Difference]: Start difference. First operand 3239 states and 4446 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:53,016 INFO L93 Difference]: Finished difference Result 6966 states and 9624 transitions. [2021-11-21 00:33:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:53,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-21 00:33:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:53,021 INFO L225 Difference]: With dead ends: 6966 [2021-11-21 00:33:53,022 INFO L226 Difference]: Without dead ends: 4151 [2021-11-21 00:33:53,025 INFO L932 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 [2021-11-21 00:33:53,026 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 81 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:53,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 296 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-11-21 00:33:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3807. [2021-11-21 00:33:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 1.362322648449816) internal successors, (5185), 3806 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 5185 transitions. [2021-11-21 00:33:53,426 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 5185 transitions. Word has length 55 [2021-11-21 00:33:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:53,426 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 5185 transitions. [2021-11-21 00:33:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 5185 transitions. [2021-11-21 00:33:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 00:33:53,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:53,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:53,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:33:53,429 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 663479602, now seen corresponding path program 1 times [2021-11-21 00:33:53,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:53,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075499381] [2021-11-21 00:33:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:53,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:53,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:53,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075499381] [2021-11-21 00:33:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075499381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:53,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:53,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:53,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390312582] [2021-11-21 00:33:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:53,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:53,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:53,472 INFO L87 Difference]: Start difference. First operand 3807 states and 5185 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:54,058 INFO L93 Difference]: Finished difference Result 6537 states and 8915 transitions. [2021-11-21 00:33:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-21 00:33:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:54,065 INFO L225 Difference]: With dead ends: 6537 [2021-11-21 00:33:54,065 INFO L226 Difference]: Without dead ends: 3442 [2021-11-21 00:33:54,069 INFO L932 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 [2021-11-21 00:33:54,071 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 73 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:54,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 302 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2021-11-21 00:33:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 3440. [2021-11-21 00:33:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.3451584763012503) internal successors, (4626), 3439 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4626 transitions. [2021-11-21 00:33:54,489 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4626 transitions. Word has length 58 [2021-11-21 00:33:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:54,489 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 4626 transitions. [2021-11-21 00:33:54,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4626 transitions. [2021-11-21 00:33:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 00:33:54,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:54,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:54,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:33:54,492 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1631752878, now seen corresponding path program 1 times [2021-11-21 00:33:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:54,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185898442] [2021-11-21 00:33:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:54,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:54,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185898442] [2021-11-21 00:33:54,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185898442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:54,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:54,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:54,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907198220] [2021-11-21 00:33:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:54,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:54,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:54,536 INFO L87 Difference]: Start difference. First operand 3440 states and 4626 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:55,062 INFO L93 Difference]: Finished difference Result 8092 states and 10966 transitions. [2021-11-21 00:33:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-21 00:33:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:55,068 INFO L225 Difference]: With dead ends: 8092 [2021-11-21 00:33:55,068 INFO L226 Difference]: Without dead ends: 4955 [2021-11-21 00:33:55,071 INFO L932 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 [2021-11-21 00:33:55,072 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 77 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:55,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 278 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2021-11-21 00:33:55,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 4395. [2021-11-21 00:33:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4394 states have (on average 1.3297678652708238) internal successors, (5843), 4394 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 5843 transitions. [2021-11-21 00:33:55,481 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 5843 transitions. Word has length 58 [2021-11-21 00:33:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:55,481 INFO L470 AbstractCegarLoop]: Abstraction has 4395 states and 5843 transitions. [2021-11-21 00:33:55,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 5843 transitions. [2021-11-21 00:33:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:33:55,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:55,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:33:55,484 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -540321193, now seen corresponding path program 1 times [2021-11-21 00:33:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:55,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601360320] [2021-11-21 00:33:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:55,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:55,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601360320] [2021-11-21 00:33:55,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601360320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:55,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:55,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547261391] [2021-11-21 00:33:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:55,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:55,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:55,527 INFO L87 Difference]: Start difference. First operand 4395 states and 5843 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:56,086 INFO L93 Difference]: Finished difference Result 6738 states and 8967 transitions. [2021-11-21 00:33:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-21 00:33:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:56,091 INFO L225 Difference]: With dead ends: 6738 [2021-11-21 00:33:56,092 INFO L226 Difference]: Without dead ends: 4715 [2021-11-21 00:33:56,094 INFO L932 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 [2021-11-21 00:33:56,095 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 73 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:56,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 315 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-21 00:33:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4713. [2021-11-21 00:33:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 1.3176994906621393) internal successors, (6209), 4712 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 6209 transitions. [2021-11-21 00:33:56,574 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 6209 transitions. Word has length 61 [2021-11-21 00:33:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:56,574 INFO L470 AbstractCegarLoop]: Abstraction has 4713 states and 6209 transitions. [2021-11-21 00:33:56,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 6209 transitions. [2021-11-21 00:33:56,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:33:56,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:56,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:56,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:33:56,576 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash -657152457, now seen corresponding path program 1 times [2021-11-21 00:33:56,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:56,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422131815] [2021-11-21 00:33:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:56,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:56,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:56,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422131815] [2021-11-21 00:33:56,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422131815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:56,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:56,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:33:56,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946336343] [2021-11-21 00:33:56,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:56,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:33:56,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:33:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:33:56,621 INFO L87 Difference]: Start difference. First operand 4713 states and 6209 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:57,488 INFO L93 Difference]: Finished difference Result 11345 states and 15044 transitions. [2021-11-21 00:33:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:33:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-21 00:33:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:57,497 INFO L225 Difference]: With dead ends: 11345 [2021-11-21 00:33:57,497 INFO L226 Difference]: Without dead ends: 6856 [2021-11-21 00:33:57,502 INFO L932 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 [2021-11-21 00:33:57,503 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 72 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:57,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 259 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:33:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2021-11-21 00:33:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 6231. [2021-11-21 00:33:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6231 states, 6230 states have (on average 1.3043338683788122) internal successors, (8126), 6230 states have internal predecessors, (8126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6231 states to 6231 states and 8126 transitions. [2021-11-21 00:33:58,237 INFO L78 Accepts]: Start accepts. Automaton has 6231 states and 8126 transitions. Word has length 61 [2021-11-21 00:33:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:58,237 INFO L470 AbstractCegarLoop]: Abstraction has 6231 states and 8126 transitions. [2021-11-21 00:33:58,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6231 states and 8126 transitions. [2021-11-21 00:33:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:33:58,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:58,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 00:33:58,239 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash -59629605, now seen corresponding path program 1 times [2021-11-21 00:33:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:58,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302118854] [2021-11-21 00:33:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:58,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:58,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302118854] [2021-11-21 00:33:58,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302118854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:58,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:33:58,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:33:58,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188234800] [2021-11-21 00:33:58,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:58,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:33:58,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:33:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:33:58,325 INFO L87 Difference]: Start difference. First operand 6231 states and 8126 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:33:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:59,573 INFO L93 Difference]: Finished difference Result 9107 states and 11864 transitions. [2021-11-21 00:33:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:33:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-21 00:33:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:59,582 INFO L225 Difference]: With dead ends: 9107 [2021-11-21 00:33:59,583 INFO L226 Difference]: Without dead ends: 9105 [2021-11-21 00:33:59,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:33:59,585 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 272 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:59,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 840 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:33:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-11-21 00:34:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 7900. [2021-11-21 00:34:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.3016837574376503) internal successors, (10282), 7899 states have internal predecessors, (10282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 10282 transitions. [2021-11-21 00:34:00,487 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 10282 transitions. Word has length 66 [2021-11-21 00:34:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:00,487 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 10282 transitions. [2021-11-21 00:34:00,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 10282 transitions. [2021-11-21 00:34:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:34:00,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:00,490 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:00,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 00:34:00,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1119321163, now seen corresponding path program 1 times [2021-11-21 00:34:00,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:00,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476342384] [2021-11-21 00:34:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:00,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:34:00,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476342384] [2021-11-21 00:34:00,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476342384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:00,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:34:00,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:34:00,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305691038] [2021-11-21 00:34:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:00,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:34:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:34:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:34:00,582 INFO L87 Difference]: Start difference. First operand 7900 states and 10282 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:02,493 INFO L93 Difference]: Finished difference Result 19178 states and 25043 transitions. [2021-11-21 00:34:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:34:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-21 00:34:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:02,507 INFO L225 Difference]: With dead ends: 19178 [2021-11-21 00:34:02,507 INFO L226 Difference]: Without dead ends: 12009 [2021-11-21 00:34:02,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:34:02,517 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 911 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:02,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 227 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:34:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12009 states. [2021-11-21 00:34:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12009 to 10222. [2021-11-21 00:34:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10222 states, 10221 states have (on average 1.284610116426964) internal successors, (13130), 10221 states have internal predecessors, (13130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10222 states to 10222 states and 13130 transitions. [2021-11-21 00:34:03,706 INFO L78 Accepts]: Start accepts. Automaton has 10222 states and 13130 transitions. Word has length 76 [2021-11-21 00:34:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:03,706 INFO L470 AbstractCegarLoop]: Abstraction has 10222 states and 13130 transitions. [2021-11-21 00:34:03,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10222 states and 13130 transitions. [2021-11-21 00:34:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:34:03,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:03,710 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 00:34:03,710 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 498183728, now seen corresponding path program 1 times [2021-11-21 00:34:03,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401127514] [2021-11-21 00:34:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:03,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:34:04,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:04,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401127514] [2021-11-21 00:34:04,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401127514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:04,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:34:04,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-21 00:34:04,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825754461] [2021-11-21 00:34:04,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:34:04,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:34:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:34:04,233 INFO L87 Difference]: Start difference. First operand 10222 states and 13130 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:07,836 INFO L93 Difference]: Finished difference Result 17757 states and 22839 transitions. [2021-11-21 00:34:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:34:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 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 76 [2021-11-21 00:34:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:07,853 INFO L225 Difference]: With dead ends: 17757 [2021-11-21 00:34:07,853 INFO L226 Difference]: Without dead ends: 13734 [2021-11-21 00:34:07,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:34:07,860 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 834 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:07,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 731 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:34:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13734 states. [2021-11-21 00:34:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13734 to 11114. [2021-11-21 00:34:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 1.2879510483217853) internal successors, (14313), 11113 states have internal predecessors, (14313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 14313 transitions. [2021-11-21 00:34:09,777 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 14313 transitions. Word has length 76 [2021-11-21 00:34:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:09,779 INFO L470 AbstractCegarLoop]: Abstraction has 11114 states and 14313 transitions. [2021-11-21 00:34:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 14313 transitions. [2021-11-21 00:34:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:34:09,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:09,782 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:09,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 00:34:09,783 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash 694416053, now seen corresponding path program 1 times [2021-11-21 00:34:09,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220425115] [2021-11-21 00:34:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:09,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:34:09,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:09,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220425115] [2021-11-21 00:34:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220425115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:09,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:34:09,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:34:09,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493588678] [2021-11-21 00:34:09,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:34:09,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:34:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:34:09,884 INFO L87 Difference]: Start difference. First operand 11114 states and 14313 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:13,274 INFO L93 Difference]: Finished difference Result 29714 states and 38431 transitions. [2021-11-21 00:34:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:34:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 76 [2021-11-21 00:34:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:13,299 INFO L225 Difference]: With dead ends: 29714 [2021-11-21 00:34:13,299 INFO L226 Difference]: Without dead ends: 19337 [2021-11-21 00:34:13,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:34:13,311 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 828 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:13,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 292 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:34:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-11-21 00:34:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 14688. [2021-11-21 00:34:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14688 states, 14687 states have (on average 1.2741199700415333) internal successors, (18713), 14687 states have internal predecessors, (18713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14688 states to 14688 states and 18713 transitions. [2021-11-21 00:34:15,683 INFO L78 Accepts]: Start accepts. Automaton has 14688 states and 18713 transitions. Word has length 76 [2021-11-21 00:34:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:15,684 INFO L470 AbstractCegarLoop]: Abstraction has 14688 states and 18713 transitions. [2021-11-21 00:34:15,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14688 states and 18713 transitions. [2021-11-21 00:34:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:34:15,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:15,687 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:15,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 00:34:15,688 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:15,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash 816928112, now seen corresponding path program 1 times [2021-11-21 00:34:15,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:15,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212641582] [2021-11-21 00:34:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:15,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:34:16,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212641582] [2021-11-21 00:34:16,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212641582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567109080] [2021-11-21 00:34:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:16,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:16,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:16,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:16,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:34:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 00:34:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:34:18,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:34:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567109080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:18,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:18,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [19] total 34 [2021-11-21 00:34:18,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548434741] [2021-11-21 00:34:18,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:18,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:34:18,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:34:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:34:18,968 INFO L87 Difference]: Start difference. First operand 14688 states and 18713 transitions. Second operand has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 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) [2021-11-21 00:34:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:24,558 INFO L93 Difference]: Finished difference Result 24625 states and 31379 transitions. [2021-11-21 00:34:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:34:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 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 76 [2021-11-21 00:34:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:24,586 INFO L225 Difference]: With dead ends: 24625 [2021-11-21 00:34:24,586 INFO L226 Difference]: Without dead ends: 19425 [2021-11-21 00:34:24,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:34:24,595 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 816 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:24,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 1100 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:34:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19425 states. [2021-11-21 00:34:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19425 to 15572. [2021-11-21 00:34:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15572 states, 15571 states have (on average 1.2733928456746515) internal successors, (19828), 15571 states have internal predecessors, (19828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15572 states to 15572 states and 19828 transitions. [2021-11-21 00:34:27,328 INFO L78 Accepts]: Start accepts. Automaton has 15572 states and 19828 transitions. Word has length 76 [2021-11-21 00:34:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:27,328 INFO L470 AbstractCegarLoop]: Abstraction has 15572 states and 19828 transitions. [2021-11-21 00:34:27,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 16 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) [2021-11-21 00:34:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 15572 states and 19828 transitions. [2021-11-21 00:34:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:34:27,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:27,331 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:27,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:27,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:27,560 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash -944575092, now seen corresponding path program 1 times [2021-11-21 00:34:27,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:27,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487561675] [2021-11-21 00:34:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:27,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:34:28,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487561675] [2021-11-21 00:34:28,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487561675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303916255] [2021-11-21 00:34:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:28,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:28,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:28,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:28,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:34:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 00:34:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:34:29,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:34:29,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303916255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:29,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:29,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 30 [2021-11-21 00:34:29,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984718243] [2021-11-21 00:34:29,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:29,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:34:29,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:34:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:34:29,870 INFO L87 Difference]: Start difference. First operand 15572 states and 19828 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:33,432 INFO L93 Difference]: Finished difference Result 21992 states and 28031 transitions. [2021-11-21 00:34:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:34:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-21 00:34:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:33,459 INFO L225 Difference]: With dead ends: 21992 [2021-11-21 00:34:33,459 INFO L226 Difference]: Without dead ends: 16673 [2021-11-21 00:34:33,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:34:33,471 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 400 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:33,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 655 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:34:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16673 states. [2021-11-21 00:34:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16673 to 15675. [2021-11-21 00:34:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15675 states, 15674 states have (on average 1.2726808727829526) internal successors, (19948), 15674 states have internal predecessors, (19948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15675 states to 15675 states and 19948 transitions. [2021-11-21 00:34:36,255 INFO L78 Accepts]: Start accepts. Automaton has 15675 states and 19948 transitions. Word has length 76 [2021-11-21 00:34:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:36,255 INFO L470 AbstractCegarLoop]: Abstraction has 15675 states and 19948 transitions. [2021-11-21 00:34:36,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 15675 states and 19948 transitions. [2021-11-21 00:34:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 00:34:36,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:36,257 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:36,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:36,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 00:34:36,477 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:36,478 INFO L85 PathProgramCache]: Analyzing trace with hash -239378593, now seen corresponding path program 1 times [2021-11-21 00:34:36,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:36,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345305294] [2021-11-21 00:34:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:36,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:34:37,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345305294] [2021-11-21 00:34:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345305294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:37,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795729394] [2021-11-21 00:34:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:37,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:37,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:37,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:34:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:34:37,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:34:38,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:34:38,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795729394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:38,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:34:38,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [27] total 31 [2021-11-21 00:34:38,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61889004] [2021-11-21 00:34:38,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:38,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:34:38,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:34:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:34:38,725 INFO L87 Difference]: Start difference. First operand 15675 states and 19948 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:43,342 INFO L93 Difference]: Finished difference Result 34003 states and 43400 transitions. [2021-11-21 00:34:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:34:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-21 00:34:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:43,373 INFO L225 Difference]: With dead ends: 34003 [2021-11-21 00:34:43,373 INFO L226 Difference]: Without dead ends: 22492 [2021-11-21 00:34:43,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:34:43,386 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 375 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:43,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 480 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:34:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22492 states. [2021-11-21 00:34:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22492 to 19294. [2021-11-21 00:34:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19294 states, 19293 states have (on average 1.26693619447468) internal successors, (24443), 19293 states have internal predecessors, (24443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19294 states to 19294 states and 24443 transitions. [2021-11-21 00:34:47,029 INFO L78 Accepts]: Start accepts. Automaton has 19294 states and 24443 transitions. Word has length 79 [2021-11-21 00:34:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:47,029 INFO L470 AbstractCegarLoop]: Abstraction has 19294 states and 24443 transitions. [2021-11-21 00:34:47,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 19294 states and 24443 transitions. [2021-11-21 00:34:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 00:34:47,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:47,032 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:34:47,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:47,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:47,247 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1703450150, now seen corresponding path program 1 times [2021-11-21 00:34:47,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104597309] [2021-11-21 00:34:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:47,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:34:47,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104597309] [2021-11-21 00:34:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104597309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243748044] [2021-11-21 00:34:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:47,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:47,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93951642-945d-49e9-a491-609caded0ec3/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:34:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-21 00:34:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:34:54,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:27,246 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 550 DAG size of output: 549 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:46:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:46:11,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243748044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:46:11,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411384193] [2021-11-21 00:46:11,385 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2021-11-21 00:46:11,385 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:46:11,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:46:11,397 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:46:11,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:46:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:46:11,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-21 00:46:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:11,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:11,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:46:11,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16