./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/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_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/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_0921a749-600d-4b5e-93d5-f1c8c6977352/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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:07:04,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:07:04,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:07:04,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:07:04,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:07:04,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:07:04,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:07:04,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:07:04,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:07:04,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:07:04,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:07:04,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:07:04,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:07:04,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:07:04,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:07:04,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:07:04,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:07:04,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:07:04,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:07:04,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:07:04,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:07:04,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:07:04,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:07:04,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:07:04,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:07:04,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:07:04,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:07:04,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:07:04,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:07:04,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:07:04,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:07:04,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:07:04,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:07:04,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:07:04,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:07:04,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:07:04,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:07:04,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:07:04,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:07:04,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:07:04,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:07:04,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:07:04,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:07:04,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:07:04,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:07:04,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:07:04,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:07:04,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:07:04,977 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:07:04,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:07:04,978 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:07:04,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:07:04,978 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:07:04,979 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:07:04,979 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:07:04,979 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:07:04,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:07:04,980 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:07:04,981 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:07:04,981 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:07:04,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:07:04,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:07:04,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:07:04,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:07:04,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:07:04,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:07:04,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:07:04,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:07:04,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:07:04,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:07:04,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:07:04,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:07:04,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:07:04,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:07:04,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:07:04,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:07:04,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:07:04,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:07:04,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:07:04,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:07:04,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:07:04,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:07:04,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:07:04,991 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_0921a749-600d-4b5e-93d5-f1c8c6977352/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2021-11-21 01:07:05,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:07:05,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:07:05,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:07:05,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:07:05,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:07:05,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2021-11-21 01:07:05,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/data/62b733d36/61eb6e88ff7249f681dcbeb363e85db5/FLAG47f2e8c9b [2021-11-21 01:07:06,067 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:07:06,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/sv-benchmarks/c/systemc/transmitter.07.cil.c [2021-11-21 01:07:06,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/data/62b733d36/61eb6e88ff7249f681dcbeb363e85db5/FLAG47f2e8c9b [2021-11-21 01:07:06,386 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/data/62b733d36/61eb6e88ff7249f681dcbeb363e85db5 [2021-11-21 01:07:06,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:07:06,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:07:06,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:07:06,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:07:06,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:07:06,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:06,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c694196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06, skipping insertion in model container [2021-11-21 01:07:06,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:06,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:07:06,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:07:06,665 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_0921a749-600d-4b5e-93d5-f1c8c6977352/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2021-11-21 01:07:06,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:07:06,860 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:07:06,875 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_0921a749-600d-4b5e-93d5-f1c8c6977352/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2021-11-21 01:07:06,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:07:06,981 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:07:06,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06 WrapperNode [2021-11-21 01:07:06,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:07:06,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:07:06,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:07:06,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:07:06,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,063 INFO L137 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 549 [2021-11-21 01:07:07,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:07:07,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:07:07,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:07:07,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:07:07,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:07:07,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:07:07,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:07:07,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:07:07,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (1/1) ... [2021-11-21 01:07:07,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:07:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:07,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:07:07,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0921a749-600d-4b5e-93d5-f1c8c6977352/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:07:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:07:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 01:07:07,236 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 01:07:07,236 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 01:07:07,236 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 01:07:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 01:07:07,237 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 01:07:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 01:07:07,237 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 01:07:07,237 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 01:07:07,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 01:07:07,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:07:07,238 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 01:07:07,238 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 01:07:07,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:07:07,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:07:07,359 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:07:07,361 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:07:08,153 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:07:08,602 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:07:08,603 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-21 01:07:08,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:07:08 BoogieIcfgContainer [2021-11-21 01:07:08,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:07:08,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:07:08,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:07:08,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:07:08,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:07:06" (1/3) ... [2021-11-21 01:07:08,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69983273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:07:08, skipping insertion in model container [2021-11-21 01:07:08,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:06" (2/3) ... [2021-11-21 01:07:08,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69983273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:07:08, skipping insertion in model container [2021-11-21 01:07:08,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:07:08" (3/3) ... [2021-11-21 01:07:08,622 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2021-11-21 01:07:08,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:07:08,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:07:08,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:07:08,705 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 01:07:08,706 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:07:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-21 01:07:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:07:08,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:08,747 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] [2021-11-21 01:07:08,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1870750755, now seen corresponding path program 1 times [2021-11-21 01:07:08,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315299505] [2021-11-21 01:07:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:08,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:09,138 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 01:07:09,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315299505] [2021-11-21 01:07:09,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315299505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:09,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:09,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:09,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861947423] [2021-11-21 01:07:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:09,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:09,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:09,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:09,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:09,192 INFO L87 Difference]: Start difference. First operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:09,635 INFO L93 Difference]: Finished difference Result 376 states and 589 transitions. [2021-11-21 01:07:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:09,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-21 01:07:09,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:09,664 INFO L225 Difference]: With dead ends: 376 [2021-11-21 01:07:09,664 INFO L226 Difference]: Without dead ends: 246 [2021-11-21 01:07:09,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:09,691 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 334 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:09,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 518 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-21 01:07:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-11-21 01:07:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 195 states have (on average 1.476923076923077) internal successors, (288), 196 states have internal predecessors, (288), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-21 01:07:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2021-11-21 01:07:09,788 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 57 [2021-11-21 01:07:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:09,789 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2021-11-21 01:07:09,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2021-11-21 01:07:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:07:09,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:09,795 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] [2021-11-21 01:07:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:07:09,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash 530774366, now seen corresponding path program 1 times [2021-11-21 01:07:09,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:09,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943062127] [2021-11-21 01:07:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:09,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:09,970 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 01:07:09,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:09,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943062127] [2021-11-21 01:07:09,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943062127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:09,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:09,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:07:09,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234289634] [2021-11-21 01:07:09,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:09,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:07:09,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:07:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:07:09,982 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:10,756 INFO L93 Difference]: Finished difference Result 825 states and 1227 transitions. [2021-11-21 01:07:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:07:10,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-21 01:07:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:10,770 INFO L225 Difference]: With dead ends: 825 [2021-11-21 01:07:10,771 INFO L226 Difference]: Without dead ends: 566 [2021-11-21 01:07:10,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:07:10,779 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:10,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 828 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:07:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-21 01:07:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 554. [2021-11-21 01:07:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 457 states have (on average 1.4704595185995624) internal successors, (672), 452 states have internal predecessors, (672), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (76), 76 states have call predecessors, (76), 68 states have call successors, (76) [2021-11-21 01:07:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 816 transitions. [2021-11-21 01:07:10,887 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 816 transitions. Word has length 57 [2021-11-21 01:07:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:10,889 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 816 transitions. [2021-11-21 01:07:10,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 816 transitions. [2021-11-21 01:07:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:07:10,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:10,902 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] [2021-11-21 01:07:10,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:07:10,903 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash 45599647, now seen corresponding path program 1 times [2021-11-21 01:07:10,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:10,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427996847] [2021-11-21 01:07:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:10,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:11,064 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 01:07:11,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427996847] [2021-11-21 01:07:11,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427996847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:11,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:11,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:07:11,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845728493] [2021-11-21 01:07:11,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:11,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:07:11,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:11,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:07:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:07:11,068 INFO L87 Difference]: Start difference. First operand 554 states and 816 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:11,747 INFO L93 Difference]: Finished difference Result 1925 states and 2870 transitions. [2021-11-21 01:07:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:07:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-21 01:07:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:11,765 INFO L225 Difference]: With dead ends: 1925 [2021-11-21 01:07:11,766 INFO L226 Difference]: Without dead ends: 1337 [2021-11-21 01:07:11,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:07:11,779 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:11,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 809 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:07:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-11-21 01:07:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1045. [2021-11-21 01:07:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 864 states have (on average 1.4699074074074074) internal successors, (1270), 860 states have internal predecessors, (1270), 124 states have call successors, (124), 50 states have call predecessors, (124), 56 states have return successors, (147), 135 states have call predecessors, (147), 124 states have call successors, (147) [2021-11-21 01:07:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1541 transitions. [2021-11-21 01:07:11,908 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1541 transitions. Word has length 57 [2021-11-21 01:07:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:11,909 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1541 transitions. [2021-11-21 01:07:11,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1541 transitions. [2021-11-21 01:07:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:07:11,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:11,914 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] [2021-11-21 01:07:11,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:07:11,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash 568920318, now seen corresponding path program 1 times [2021-11-21 01:07:11,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919016114] [2021-11-21 01:07:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:11,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:12,070 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 01:07:12,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919016114] [2021-11-21 01:07:12,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919016114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:12,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:12,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:07:12,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142754422] [2021-11-21 01:07:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:12,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:07:12,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:07:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:07:12,076 INFO L87 Difference]: Start difference. First operand 1045 states and 1541 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:12,737 INFO L93 Difference]: Finished difference Result 3566 states and 5337 transitions. [2021-11-21 01:07:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:07:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-21 01:07:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:12,767 INFO L225 Difference]: With dead ends: 3566 [2021-11-21 01:07:12,768 INFO L226 Difference]: Without dead ends: 2452 [2021-11-21 01:07:12,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:07:12,780 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 680 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:12,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 680 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:07:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-11-21 01:07:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2001. [2021-11-21 01:07:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 1656 states have (on average 1.4673913043478262) internal successors, (2430), 1656 states have internal predecessors, (2430), 232 states have call successors, (232), 98 states have call predecessors, (232), 112 states have return successors, (283), 247 states have call predecessors, (283), 232 states have call successors, (283) [2021-11-21 01:07:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2945 transitions. [2021-11-21 01:07:12,942 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2945 transitions. Word has length 57 [2021-11-21 01:07:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:12,943 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 2945 transitions. [2021-11-21 01:07:12,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2945 transitions. [2021-11-21 01:07:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:07:12,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:12,945 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] [2021-11-21 01:07:12,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:07:12,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1487894941, now seen corresponding path program 1 times [2021-11-21 01:07:12,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515687944] [2021-11-21 01:07:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:12,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:13,052 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 01:07:13,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:13,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515687944] [2021-11-21 01:07:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515687944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:13,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:13,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:07:13,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31772308] [2021-11-21 01:07:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:13,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:07:13,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:07:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:07:13,065 INFO L87 Difference]: Start difference. First operand 2001 states and 2945 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:13,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:13,807 INFO L93 Difference]: Finished difference Result 6728 states and 10091 transitions. [2021-11-21 01:07:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:07:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-21 01:07:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:13,852 INFO L225 Difference]: With dead ends: 6728 [2021-11-21 01:07:13,853 INFO L226 Difference]: Without dead ends: 4590 [2021-11-21 01:07:13,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:07:13,871 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 682 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:13,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 681 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-11-21 01:07:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 3889. [2021-11-21 01:07:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3208 states have (on average 1.4607231920199502) internal successors, (4686), 3216 states have internal predecessors, (4686), 456 states have call successors, (456), 194 states have call predecessors, (456), 224 states have return successors, (567), 479 states have call predecessors, (567), 456 states have call successors, (567) [2021-11-21 01:07:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 5709 transitions. [2021-11-21 01:07:14,244 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 5709 transitions. Word has length 57 [2021-11-21 01:07:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:14,247 INFO L470 AbstractCegarLoop]: Abstraction has 3889 states and 5709 transitions. [2021-11-21 01:07:14,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:07:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 5709 transitions. [2021-11-21 01:07:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:07:14,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:14,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:14,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:07:14,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2137262399, now seen corresponding path program 1 times [2021-11-21 01:07:14,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:14,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285821183] [2021-11-21 01:07:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:14,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:07:14,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:14,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285821183] [2021-11-21 01:07:14,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285821183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:14,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:14,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:07:14,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672305417] [2021-11-21 01:07:14,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:14,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:14,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:07:14,383 INFO L87 Difference]: Start difference. First operand 3889 states and 5709 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:15,312 INFO L93 Difference]: Finished difference Result 11946 states and 17635 transitions. [2021-11-21 01:07:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:07:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2021-11-21 01:07:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:15,401 INFO L225 Difference]: With dead ends: 11946 [2021-11-21 01:07:15,401 INFO L226 Difference]: Without dead ends: 8063 [2021-11-21 01:07:15,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:15,423 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 678 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:15,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 462 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8063 states. [2021-11-21 01:07:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8063 to 6503. [2021-11-21 01:07:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6503 states, 5426 states have (on average 1.4472908219683007) internal successors, (7853), 5441 states have internal predecessors, (7853), 692 states have call successors, (692), 324 states have call predecessors, (692), 384 states have return successors, (914), 738 states have call predecessors, (914), 692 states have call successors, (914) [2021-11-21 01:07:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6503 states to 6503 states and 9459 transitions. [2021-11-21 01:07:16,005 INFO L78 Accepts]: Start accepts. Automaton has 6503 states and 9459 transitions. Word has length 74 [2021-11-21 01:07:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:16,005 INFO L470 AbstractCegarLoop]: Abstraction has 6503 states and 9459 transitions. [2021-11-21 01:07:16,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6503 states and 9459 transitions. [2021-11-21 01:07:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:07:16,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:16,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:16,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:07:16,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -128449713, now seen corresponding path program 1 times [2021-11-21 01:07:16,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:16,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72777697] [2021-11-21 01:07:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:16,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:07:16,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:16,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72777697] [2021-11-21 01:07:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72777697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:16,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:07:16,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956099564] [2021-11-21 01:07:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:16,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:16,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:07:16,192 INFO L87 Difference]: Start difference. First operand 6503 states and 9459 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:17,554 INFO L93 Difference]: Finished difference Result 23659 states and 34568 transitions. [2021-11-21 01:07:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:07:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 76 [2021-11-21 01:07:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:17,724 INFO L225 Difference]: With dead ends: 23659 [2021-11-21 01:07:17,724 INFO L226 Difference]: Without dead ends: 17162 [2021-11-21 01:07:17,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:17,763 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 660 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:17,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 512 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17162 states. [2021-11-21 01:07:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17162 to 12700. [2021-11-21 01:07:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12700 states, 10599 states have (on average 1.4392867251627512) internal successors, (15255), 10630 states have internal predecessors, (15255), 1332 states have call successors, (1332), 648 states have call predecessors, (1332), 768 states have return successors, (1746), 1422 states have call predecessors, (1746), 1332 states have call successors, (1746) [2021-11-21 01:07:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12700 states to 12700 states and 18333 transitions. [2021-11-21 01:07:19,046 INFO L78 Accepts]: Start accepts. Automaton has 12700 states and 18333 transitions. Word has length 76 [2021-11-21 01:07:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:19,048 INFO L470 AbstractCegarLoop]: Abstraction has 12700 states and 18333 transitions. [2021-11-21 01:07:19,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 12700 states and 18333 transitions. [2021-11-21 01:07:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 01:07:19,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:19,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:19,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:07:19,066 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1364751073, now seen corresponding path program 1 times [2021-11-21 01:07:19,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:19,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837139710] [2021-11-21 01:07:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:19,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:07:19,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837139710] [2021-11-21 01:07:19,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837139710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:19,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:19,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:07:19,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716678098] [2021-11-21 01:07:19,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:19,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:19,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:07:19,202 INFO L87 Difference]: Start difference. First operand 12700 states and 18333 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:21,012 INFO L93 Difference]: Finished difference Result 35860 states and 52089 transitions. [2021-11-21 01:07:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:07:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 78 [2021-11-21 01:07:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:21,259 INFO L225 Difference]: With dead ends: 35860 [2021-11-21 01:07:21,259 INFO L226 Difference]: Without dead ends: 23166 [2021-11-21 01:07:21,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:21,315 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 573 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:21,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 582 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23166 states. [2021-11-21 01:07:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23166 to 18788. [2021-11-21 01:07:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18788 states, 15655 states have (on average 1.4320664324496966) internal successors, (22419), 15688 states have internal predecessors, (22419), 1980 states have call successors, (1980), 976 states have call predecessors, (1980), 1152 states have return successors, (2572), 2124 states have call predecessors, (2572), 1980 states have call successors, (2572) [2021-11-21 01:07:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18788 states to 18788 states and 26971 transitions. [2021-11-21 01:07:23,125 INFO L78 Accepts]: Start accepts. Automaton has 18788 states and 26971 transitions. Word has length 78 [2021-11-21 01:07:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:23,126 INFO L470 AbstractCegarLoop]: Abstraction has 18788 states and 26971 transitions. [2021-11-21 01:07:23,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 18788 states and 26971 transitions. [2021-11-21 01:07:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:07:23,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:23,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:23,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:07:23,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1247671593, now seen corresponding path program 1 times [2021-11-21 01:07:23,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:23,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308225405] [2021-11-21 01:07:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:23,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:07:23,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:23,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308225405] [2021-11-21 01:07:23,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308225405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:23,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:23,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:07:23,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954178128] [2021-11-21 01:07:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:23,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:23,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:23,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:07:23,271 INFO L87 Difference]: Start difference. First operand 18788 states and 26971 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:25,235 INFO L93 Difference]: Finished difference Result 46656 states and 66893 transitions. [2021-11-21 01:07:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:07:25,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 80 [2021-11-21 01:07:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:25,392 INFO L225 Difference]: With dead ends: 46656 [2021-11-21 01:07:25,393 INFO L226 Difference]: Without dead ends: 27874 [2021-11-21 01:07:25,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:07:25,448 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 518 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:25,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 447 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27874 states. [2021-11-21 01:07:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27874 to 27872. [2021-11-21 01:07:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27872 states, 23195 states have (on average 1.4245742616943307) internal successors, (33043), 23220 states have internal predecessors, (33043), 2948 states have call successors, (2948), 1472 states have call predecessors, (2948), 1728 states have return successors, (3788), 3180 states have call predecessors, (3788), 2948 states have call successors, (3788) [2021-11-21 01:07:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27872 states to 27872 states and 39779 transitions. [2021-11-21 01:07:27,736 INFO L78 Accepts]: Start accepts. Automaton has 27872 states and 39779 transitions. Word has length 80 [2021-11-21 01:07:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:27,737 INFO L470 AbstractCegarLoop]: Abstraction has 27872 states and 39779 transitions. [2021-11-21 01:07:27,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27872 states and 39779 transitions. [2021-11-21 01:07:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:07:27,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:27,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:27,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:07:27,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash 785546593, now seen corresponding path program 1 times [2021-11-21 01:07:27,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:27,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785492247] [2021-11-21 01:07:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:27,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:07:27,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:27,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785492247] [2021-11-21 01:07:27,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785492247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:27,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:27,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:07:27,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089816006] [2021-11-21 01:07:27,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:27,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:27,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:27,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:07:27,897 INFO L87 Difference]: Start difference. First operand 27872 states and 39779 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:31,221 INFO L93 Difference]: Finished difference Result 74218 states and 106645 transitions. [2021-11-21 01:07:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:07:31,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-11-21 01:07:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:31,430 INFO L225 Difference]: With dead ends: 74218 [2021-11-21 01:07:31,431 INFO L226 Difference]: Without dead ends: 46352 [2021-11-21 01:07:31,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:31,491 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 523 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:31,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 537 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:07:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46352 states. [2021-11-21 01:07:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46352 to 41566. [2021-11-21 01:07:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41566 states, 34575 states have (on average 1.417006507592191) internal successors, (48993), 34568 states have internal predecessors, (48993), 4398 states have call successors, (4398), 2224 states have call predecessors, (4398), 2592 states have return successors, (5578), 4774 states have call predecessors, (5578), 4398 states have call successors, (5578) [2021-11-21 01:07:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41566 states to 41566 states and 58969 transitions. [2021-11-21 01:07:34,722 INFO L78 Accepts]: Start accepts. Automaton has 41566 states and 58969 transitions. Word has length 82 [2021-11-21 01:07:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 41566 states and 58969 transitions. [2021-11-21 01:07:34,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 41566 states and 58969 transitions. [2021-11-21 01:07:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 01:07:34,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:34,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:34,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:07:34,745 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:34,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1390026839, now seen corresponding path program 1 times [2021-11-21 01:07:34,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:34,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645111635] [2021-11-21 01:07:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:34,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:07:34,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645111635] [2021-11-21 01:07:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645111635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:34,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:34,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:07:34,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784472561] [2021-11-21 01:07:34,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:34,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:07:34,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:07:34,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:07:34,868 INFO L87 Difference]: Start difference. First operand 41566 states and 58969 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:40,225 INFO L93 Difference]: Finished difference Result 130646 states and 186342 transitions. [2021-11-21 01:07:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:07:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-21 01:07:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:40,647 INFO L225 Difference]: With dead ends: 130646 [2021-11-21 01:07:40,648 INFO L226 Difference]: Without dead ends: 89086 [2021-11-21 01:07:40,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:40,766 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 524 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:40,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 406 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:07:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89086 states. [2021-11-21 01:07:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89086 to 81020. [2021-11-21 01:07:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81020 states, 67367 states have (on average 1.4073804681817508) internal successors, (94811), 67384 states have internal predecessors, (94811), 8468 states have call successors, (8468), 4448 states have call predecessors, (8468), 5184 states have return successors, (10644), 9188 states have call predecessors, (10644), 8468 states have call successors, (10644) [2021-11-21 01:07:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81020 states to 81020 states and 113923 transitions. [2021-11-21 01:07:47,277 INFO L78 Accepts]: Start accepts. Automaton has 81020 states and 113923 transitions. Word has length 84 [2021-11-21 01:07:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:47,277 INFO L470 AbstractCegarLoop]: Abstraction has 81020 states and 113923 transitions. [2021-11-21 01:07:47,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:07:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 81020 states and 113923 transitions. [2021-11-21 01:07:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:07:47,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:47,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:47,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:07:47,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1346442015, now seen corresponding path program 1 times [2021-11-21 01:07:47,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:47,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146500155] [2021-11-21 01:07:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:47,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:07:47,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146500155] [2021-11-21 01:07:47,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146500155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:47,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:47,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:07:47,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867751544] [2021-11-21 01:07:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:47,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:07:47,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:07:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:07:47,379 INFO L87 Difference]: Start difference. First operand 81020 states and 113923 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:07:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:53,728 INFO L93 Difference]: Finished difference Result 156098 states and 222236 transitions. [2021-11-21 01:07:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:07:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-11-21 01:07:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:54,610 INFO L225 Difference]: With dead ends: 156098 [2021-11-21 01:07:54,610 INFO L226 Difference]: Without dead ends: 111868 [2021-11-21 01:07:54,730 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 01:07:54,731 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 120 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:54,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 441 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:07:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111868 states. [2021-11-21 01:08:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111868 to 90570. [2021-11-21 01:08:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90570 states, 76269 states have (on average 1.426123326646475) internal successors, (108769), 76286 states have internal predecessors, (108769), 8792 states have call successors, (8792), 4772 states have call predecessors, (8792), 5508 states have return successors, (10968), 9512 states have call predecessors, (10968), 8792 states have call successors, (10968) [2021-11-21 01:08:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90570 states to 90570 states and 128529 transitions. [2021-11-21 01:08:00,808 INFO L78 Accepts]: Start accepts. Automaton has 90570 states and 128529 transitions. Word has length 86 [2021-11-21 01:08:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:00,809 INFO L470 AbstractCegarLoop]: Abstraction has 90570 states and 128529 transitions. [2021-11-21 01:08:00,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:08:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 90570 states and 128529 transitions. [2021-11-21 01:08:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-21 01:08:00,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:00,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:00,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:08:00,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:00,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1712593534, now seen corresponding path program 1 times [2021-11-21 01:08:00,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:00,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713170840] [2021-11-21 01:08:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:00,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 01:08:00,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:00,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713170840] [2021-11-21 01:08:00,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713170840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:00,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:00,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:08:00,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352411325] [2021-11-21 01:08:00,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:00,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:08:00,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:08:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:08:00,941 INFO L87 Difference]: Start difference. First operand 90570 states and 128529 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)