./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/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 1cb4eb95fbb86e81adddda10624c3164b4456d4761ce2ac967ea89c58c777ea3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:39:16,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:39:16,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:39:16,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:39:16,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:39:16,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:39:16,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:39:16,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:39:16,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:39:16,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:39:16,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:39:16,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:39:16,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:39:16,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:39:16,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:39:16,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:39:16,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:39:16,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:39:16,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:39:16,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:39:16,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:39:16,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:39:16,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:39:16,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:39:16,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:39:16,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:39:16,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:39:16,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:39:16,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:39:16,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:39:16,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:39:16,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:39:16,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:39:16,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:39:16,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:39:16,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:39:16,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:39:16,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:39:16,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:39:16,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:39:16,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:39:16,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:39:17,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:39:17,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:39:17,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:39:17,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:39:17,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:39:17,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:39:17,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:39:17,019 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:39:17,020 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:39:17,020 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:39:17,021 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:39:17,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:39:17,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:39:17,022 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:39:17,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:39:17,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:39:17,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:39:17,023 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:39:17,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:39:17,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:39:17,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:39:17,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:39:17,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:39:17,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:39:17,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:39:17,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:39:17,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:39:17,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:39:17,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:39:17,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:39:17,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:39:17,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:39:17,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:39:17,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:39:17,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:39:17,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:39:17,029 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:39:17,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:39:17,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:39:17,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:39:17,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:39:17,031 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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cb4eb95fbb86e81adddda10624c3164b4456d4761ce2ac967ea89c58c777ea3 [2021-11-21 01:39:17,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:39:17,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:39:17,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:39:17,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:39:17,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:39:17,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c [2021-11-21 01:39:17,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/data/4d1ccc2e6/cf9acf0ee62345d1968c0de9575a236e/FLAG7c5f39481 [2021-11-21 01:39:18,699 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:39:18,701 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c [2021-11-21 01:39:18,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/data/4d1ccc2e6/cf9acf0ee62345d1968c0de9575a236e/FLAG7c5f39481 [2021-11-21 01:39:18,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/data/4d1ccc2e6/cf9acf0ee62345d1968c0de9575a236e [2021-11-21 01:39:18,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:39:18,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:39:18,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:39:18,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:39:18,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:39:18,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:39:18" (1/1) ... [2021-11-21 01:39:18,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3860929a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:18, skipping insertion in model container [2021-11-21 01:39:18,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:39:18" (1/1) ... [2021-11-21 01:39:18,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:39:19,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:39:22,165 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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[380593,380606] [2021-11-21 01:39:22,204 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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[383339,383352] [2021-11-21 01:39:22,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:39:22,493 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:39:24,037 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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[380593,380606] [2021-11-21 01:39:24,045 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_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-1.c[383339,383352] [2021-11-21 01:39:24,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:39:24,198 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:39:24,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24 WrapperNode [2021-11-21 01:39:24,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:39:24,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:39:24,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:39:24,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:39:24,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:24,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:24,891 INFO L137 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2021-11-21 01:39:24,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:39:24,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:39:24,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:39:24,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:39:24,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:24,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:24,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:24,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:25,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:25,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:25,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:25,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:39:25,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:39:25,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:39:25,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:39:25,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (1/1) ... [2021-11-21 01:39:25,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:39:25,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:25,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:39:25,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:39:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:39:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 01:39:25,849 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 01:39:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 01:39:25,850 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 01:39:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 01:39:25,850 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 01:39:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 01:39:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 01:39:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 01:39:25,868 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 01:39:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 01:39:25,868 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 01:39:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:39:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:39:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:39:26,088 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:39:26,090 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:39:35,389 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:39:37,930 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:39:37,930 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-21 01:39:37,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:39:37 BoogieIcfgContainer [2021-11-21 01:39:37,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:39:37,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:39:37,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:39:37,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:39:37,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:39:18" (1/3) ... [2021-11-21 01:39:37,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c846281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:39:37, skipping insertion in model container [2021-11-21 01:39:37,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:39:24" (2/3) ... [2021-11-21 01:39:37,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c846281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:39:37, skipping insertion in model container [2021-11-21 01:39:37,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:39:37" (3/3) ... [2021-11-21 01:39:37,945 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.04.cil-1.c [2021-11-21 01:39:37,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:39:37,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:39:38,024 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:39:38,033 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 01:39:38,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:39:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-21 01:39:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:39:38,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:38,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:38,128 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 909227624, now seen corresponding path program 1 times [2021-11-21 01:39:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:38,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958877256] [2021-11-21 01:39:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:38,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:38,506 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 01:39:38,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:38,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958877256] [2021-11-21 01:39:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958877256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:38,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:39:38,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:39:38,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919552398] [2021-11-21 01:39:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:38,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:39:38,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:39:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:39:38,561 INFO L87 Difference]: Start difference. First operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 01:39:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:39,790 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2021-11-21 01:39:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:39:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 43 [2021-11-21 01:39:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:39,825 INFO L225 Difference]: With dead ends: 3569 [2021-11-21 01:39:39,826 INFO L226 Difference]: Without dead ends: 1825 [2021-11-21 01:39:39,837 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 01:39:39,842 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:39,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:39:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-11-21 01:39:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2021-11-21 01:39:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1778 states have (on average 1.9482564679415073) internal successors, (3464), 1781 states have internal predecessors, (3464), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-21 01:39:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2021-11-21 01:39:40,082 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2021-11-21 01:39:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:40,083 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2021-11-21 01:39:40,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 01:39:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2021-11-21 01:39:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:39:40,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:40,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:40,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:39:40,107 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1184195009, now seen corresponding path program 1 times [2021-11-21 01:39:40,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:40,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251378226] [2021-11-21 01:39:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:40,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:39:40,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:40,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251378226] [2021-11-21 01:39:40,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251378226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048259640] [2021-11-21 01:39:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:40,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:40,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:40,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:39:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:39:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:39:40,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:40,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048259640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:40,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:39:40,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:39:40,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060620947] [2021-11-21 01:39:40,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:40,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:40,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:40,877 INFO L87 Difference]: Start difference. First operand 1824 states and 3528 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:39:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:41,551 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2021-11-21 01:39:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2021-11-21 01:39:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:41,572 INFO L225 Difference]: With dead ends: 2173 [2021-11-21 01:39:41,572 INFO L226 Difference]: Without dead ends: 1995 [2021-11-21 01:39:41,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:41,575 INFO L933 BasicCegarLoop]: 3207 mSDtfsCounter, 3384 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:41,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3384 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:39:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-11-21 01:39:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2021-11-21 01:39:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1907 states have (on average 1.9113791295228106) internal successors, (3645), 1911 states have internal predecessors, (3645), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-21 01:39:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2021-11-21 01:39:41,680 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2021-11-21 01:39:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:41,681 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2021-11-21 01:39:41,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:39:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2021-11-21 01:39:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:39:41,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:41,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:41,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:41,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:41,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1703979425, now seen corresponding path program 1 times [2021-11-21 01:39:41,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:41,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792412853] [2021-11-21 01:39:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:41,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:39:42,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792412853] [2021-11-21 01:39:42,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792412853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:42,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715703614] [2021-11-21 01:39:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:42,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:42,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:42,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:39:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:39:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:39:42,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:42,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715703614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:42,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:39:42,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:39:42,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304150529] [2021-11-21 01:39:42,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:42,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:42,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:42,477 INFO L87 Difference]: Start difference. First operand 1991 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:39:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:43,070 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2021-11-21 01:39:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2021-11-21 01:39:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:43,092 INFO L225 Difference]: With dead ends: 2668 [2021-11-21 01:39:43,093 INFO L226 Difference]: Without dead ends: 2323 [2021-11-21 01:39:43,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:43,097 INFO L933 BasicCegarLoop]: 3182 mSDtfsCounter, 3381 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:43,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3381 Valid, 3287 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:39:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-11-21 01:39:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2021-11-21 01:39:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2159 states have (on average 1.8503937007874016) internal successors, (3995), 2165 states have internal predecessors, (3995), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-21 01:39:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2021-11-21 01:39:43,226 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2021-11-21 01:39:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:43,226 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2021-11-21 01:39:43,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:39:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2021-11-21 01:39:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:39:43,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:43,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:43,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:43,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:43,448 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1875022399, now seen corresponding path program 1 times [2021-11-21 01:39:43,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:43,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431335316] [2021-11-21 01:39:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:43,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:39:43,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431335316] [2021-11-21 01:39:43,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431335316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:43,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:39:43,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:39:43,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944883510] [2021-11-21 01:39:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:43,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:43,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:39:43,559 INFO L87 Difference]: Start difference. First operand 2317 states and 4211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 01:39:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:44,299 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2021-11-21 01:39:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-11-21 01:39:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:44,327 INFO L225 Difference]: With dead ends: 2839 [2021-11-21 01:39:44,328 INFO L226 Difference]: Without dead ends: 2493 [2021-11-21 01:39:44,330 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 01:39:44,333 INFO L933 BasicCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:44,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:39:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-11-21 01:39:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2021-11-21 01:39:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2255 states have (on average 1.8425720620842572) internal successors, (4155), 2261 states have internal predecessors, (4155), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-21 01:39:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2021-11-21 01:39:44,489 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2021-11-21 01:39:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:44,490 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2021-11-21 01:39:44,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 01:39:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2021-11-21 01:39:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-21 01:39:44,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:44,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:44,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:39:44,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1908085549, now seen corresponding path program 1 times [2021-11-21 01:39:44,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:44,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449497206] [2021-11-21 01:39:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:44,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-21 01:39:44,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:44,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449497206] [2021-11-21 01:39:44,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449497206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:44,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:39:44,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:39:44,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449734632] [2021-11-21 01:39:44,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:44,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:39:44,696 INFO L87 Difference]: Start difference. First operand 2421 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:39:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:45,253 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2021-11-21 01:39:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2021-11-21 01:39:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:45,281 INFO L225 Difference]: With dead ends: 3934 [2021-11-21 01:39:45,282 INFO L226 Difference]: Without dead ends: 3159 [2021-11-21 01:39:45,286 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 01:39:45,287 INFO L933 BasicCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:45,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3375 Valid, 3294 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:39:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-11-21 01:39:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2021-11-21 01:39:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2827 states have (on average 1.7541563494870889) internal successors, (4959), 2837 states have internal predecessors, (4959), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2021-11-21 01:39:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2021-11-21 01:39:45,468 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2021-11-21 01:39:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:45,469 INFO L470 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2021-11-21 01:39:45,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:39:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2021-11-21 01:39:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-21 01:39:45,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:45,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:45,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:39:45,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 14699688, now seen corresponding path program 1 times [2021-11-21 01:39:45,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:45,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564678787] [2021-11-21 01:39:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:45,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-21 01:39:45,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564678787] [2021-11-21 01:39:45,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564678787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:45,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:39:45,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:39:45,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992618213] [2021-11-21 01:39:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:45,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:45,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:39:45,580 INFO L87 Difference]: Start difference. First operand 3145 states and 5383 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:39:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:46,353 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2021-11-21 01:39:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2021-11-21 01:39:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:46,394 INFO L225 Difference]: With dead ends: 6070 [2021-11-21 01:39:46,394 INFO L226 Difference]: Without dead ends: 4571 [2021-11-21 01:39:46,404 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 01:39:46,406 INFO L933 BasicCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:46,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3378 Valid, 3292 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:39:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-11-21 01:39:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2021-11-21 01:39:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3931 states have (on average 1.6502162299669296) internal successors, (6487), 3949 states have internal predecessors, (6487), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-21 01:39:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2021-11-21 01:39:46,675 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2021-11-21 01:39:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:46,676 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2021-11-21 01:39:46,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:39:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2021-11-21 01:39:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:39:46,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:46,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:46,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:39:46,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2127606620, now seen corresponding path program 1 times [2021-11-21 01:39:46,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:46,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259825708] [2021-11-21 01:39:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:46,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:39:46,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259825708] [2021-11-21 01:39:46,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259825708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349793831] [2021-11-21 01:39:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:46,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:46,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:46,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:39:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:39:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:39:47,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:47,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349793831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:47,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:39:47,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:39:47,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313404576] [2021-11-21 01:39:47,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:47,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:47,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:47,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:47,347 INFO L87 Difference]: Start difference. First operand 4545 states and 7295 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:48,114 INFO L93 Difference]: Finished difference Result 6981 states and 10769 transitions. [2021-11-21 01:39:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2021-11-21 01:39:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:48,183 INFO L225 Difference]: With dead ends: 6981 [2021-11-21 01:39:48,184 INFO L226 Difference]: Without dead ends: 5495 [2021-11-21 01:39:48,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:48,194 INFO L933 BasicCegarLoop]: 3234 mSDtfsCounter, 68 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:48,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 6410 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:39:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-11-21 01:39:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5053. [2021-11-21 01:39:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 4391 states have (on average 1.6467774994306537) internal successors, (7231), 4409 states have internal predecessors, (7231), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2021-11-21 01:39:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2021-11-21 01:39:48,509 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2021-11-21 01:39:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:48,511 INFO L470 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2021-11-21 01:39:48,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2021-11-21 01:39:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:39:48,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:48,535 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:48,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:48,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:48,763 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:48,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1244702449, now seen corresponding path program 1 times [2021-11-21 01:39:48,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:48,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924935868] [2021-11-21 01:39:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:48,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-21 01:39:48,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924935868] [2021-11-21 01:39:48,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924935868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115087297] [2021-11-21 01:39:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:48,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:48,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:39:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:39:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:39:49,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115087297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:49,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:39:49,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:39:49,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750522125] [2021-11-21 01:39:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:49,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:49,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:49,438 INFO L87 Difference]: Start difference. First operand 5053 states and 8087 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:50,336 INFO L93 Difference]: Finished difference Result 8017 states and 12365 transitions. [2021-11-21 01:39:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2021-11-21 01:39:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:50,401 INFO L225 Difference]: With dead ends: 8017 [2021-11-21 01:39:50,402 INFO L226 Difference]: Without dead ends: 6271 [2021-11-21 01:39:50,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:50,412 INFO L933 BasicCegarLoop]: 3247 mSDtfsCounter, 74 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:50,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 6423 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:39:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2021-11-21 01:39:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 5773. [2021-11-21 01:39:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 5039 states have (on average 1.6398094860091288) internal successors, (8263), 5057 states have internal predecessors, (8263), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2021-11-21 01:39:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2021-11-21 01:39:51,057 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2021-11-21 01:39:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:51,058 INFO L470 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2021-11-21 01:39:51,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2021-11-21 01:39:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:39:51,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:51,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:51,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:51,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:39:51,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash -66631846, now seen corresponding path program 1 times [2021-11-21 01:39:51,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:51,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611364003] [2021-11-21 01:39:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:51,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-21 01:39:51,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611364003] [2021-11-21 01:39:51,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611364003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:51,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247806922] [2021-11-21 01:39:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:51,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:51,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:51,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:39:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:39:51,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:39:51,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:51,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247806922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:51,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:39:51,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:39:51,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641508786] [2021-11-21 01:39:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:51,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:51,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:51,860 INFO L87 Difference]: Start difference. First operand 5773 states and 9191 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:52,622 INFO L93 Difference]: Finished difference Result 9513 states and 14663 transitions. [2021-11-21 01:39:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2021-11-21 01:39:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:52,662 INFO L225 Difference]: With dead ends: 9513 [2021-11-21 01:39:52,662 INFO L226 Difference]: Without dead ends: 7371 [2021-11-21 01:39:52,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:52,675 INFO L933 BasicCegarLoop]: 3252 mSDtfsCounter, 80 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:52,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 6428 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:39:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2021-11-21 01:39:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 6817. [2021-11-21 01:39:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6817 states, 5975 states have (on average 1.6299581589958159) internal successors, (9739), 5993 states have internal predecessors, (9739), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2021-11-21 01:39:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2021-11-21 01:39:53,193 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2021-11-21 01:39:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:53,194 INFO L470 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2021-11-21 01:39:53,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2021-11-21 01:39:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:39:53,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:53,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:53,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:53,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:53,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1350033641, now seen corresponding path program 1 times [2021-11-21 01:39:53,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899658026] [2021-11-21 01:39:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:53,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-21 01:39:53,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899658026] [2021-11-21 01:39:53,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899658026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:53,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107349847] [2021-11-21 01:39:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:53,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:53,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:53,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:53,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:39:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:39:53,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:39:54,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:39:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107349847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:39:54,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:39:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:39:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44924669] [2021-11-21 01:39:54,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:39:54,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:39:54,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:39:54,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:39:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:54,046 INFO L87 Difference]: Start difference. First operand 6817 states and 10775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:54,948 INFO L93 Difference]: Finished difference Result 11379 states and 17534 transitions. [2021-11-21 01:39:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:39:54,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2021-11-21 01:39:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:54,989 INFO L225 Difference]: With dead ends: 11379 [2021-11-21 01:39:54,990 INFO L226 Difference]: Without dead ends: 8688 [2021-11-21 01:39:55,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:39:55,004 INFO L933 BasicCegarLoop]: 3237 mSDtfsCounter, 62 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:55,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 6413 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:39:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2021-11-21 01:39:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8302. [2021-11-21 01:39:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 7298 states have (on average 1.6156481227733626) internal successors, (11791), 7316 states have internal predecessors, (11791), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2021-11-21 01:39:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2021-11-21 01:39:55,445 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2021-11-21 01:39:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:55,446 INFO L470 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2021-11-21 01:39:55,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:39:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2021-11-21 01:39:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:39:55,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:55,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:39:55,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:55,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:55,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:39:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash -394005827, now seen corresponding path program 2 times [2021-11-21 01:39:55,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:39:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832252497] [2021-11-21 01:39:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:55,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:39:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 01:39:55,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:55,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832252497] [2021-11-21 01:39:55,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832252497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:55,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122490411] [2021-11-21 01:39:55,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:39:55,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:55,815 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:55,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:39:55,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:39:55,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:39:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:39:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:39:56,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:39:57,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122490411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904250285] [2021-11-21 01:39:57,500 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-21 01:39:57,500 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:39:57,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:39:57,514 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:39:57,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:39,162 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2021-11-21 01:41:40,240 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-21 01:41:40,775 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-21 01:44:28,110 WARN L227 SmtUtils]: Spent 2.77m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-21 01:47:18,663 WARN L227 SmtUtils]: Spent 2.84m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-21 01:47:18,669 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 143 for LOIs [2021-11-21 01:47:19,084 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2021-11-21 01:47:19,389 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 108 for LOIs [2021-11-21 01:47:19,869 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 105 for LOIs [2021-11-21 01:47:21,934 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 243 for LOIs [2021-11-21 01:48:46,537 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:49:46,808 WARN L227 SmtUtils]: Spent 39.65s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:49:56,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [904250285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:56,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:49:56,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [6, 7, 6] total 52 [2021-11-21 01:49:56,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558086226] [2021-11-21 01:49:56,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:56,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 01:49:56,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:49:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 01:49:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 01:49:56,783 INFO L87 Difference]: Start difference. First operand 8302 states and 12989 transitions. Second operand has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 32 states have internal predecessors, (53), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-21 01:51:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:59,722 INFO L93 Difference]: Finished difference Result 15676 states and 23722 transitions. [2021-11-21 01:51:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-21 01:51:59,723 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 32 states have internal predecessors, (53), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 120 [2021-11-21 01:51:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:59,757 INFO L225 Difference]: With dead ends: 15676 [2021-11-21 01:51:59,757 INFO L226 Difference]: Without dead ends: 9008 [2021-11-21 01:51:59,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 313 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 108.0s TimeCoverageRelationStatistics Valid=1356, Invalid=8346, Unknown=0, NotChecked=0, Total=9702 [2021-11-21 01:51:59,777 INFO L933 BasicCegarLoop]: 3275 mSDtfsCounter, 498 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 63421 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 5803 SdHoareTripleChecker+Invalid, 63610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 63421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:59,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 5803 Invalid, 63610 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [189 Valid, 63421 Invalid, 0 Unknown, 0 Unchecked, 84.3s Time] [2021-11-21 01:51:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9008 states. [2021-11-21 01:52:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9008 to 8621. [2021-11-21 01:52:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8621 states, 7558 states have (on average 1.6047896268854194) internal successors, (12129), 7575 states have internal predecessors, (12129), 632 states have call successors, (632), 430 states have call predecessors, (632), 429 states have return successors, (634), 616 states have call predecessors, (634), 632 states have call successors, (634) [2021-11-21 01:52:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8621 states to 8621 states and 13395 transitions. [2021-11-21 01:52:00,214 INFO L78 Accepts]: Start accepts. Automaton has 8621 states and 13395 transitions. Word has length 120 [2021-11-21 01:52:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 8621 states and 13395 transitions. [2021-11-21 01:52:00,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 32 states have internal predecessors, (53), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-21 01:52:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8621 states and 13395 transitions. [2021-11-21 01:52:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:52:00,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:00,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:52:00,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:52:00,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:52:00,471 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:00,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash 603963402, now seen corresponding path program 1 times [2021-11-21 01:52:00,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:00,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910326463] [2021-11-21 01:52:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:00,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:52:00,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910326463] [2021-11-21 01:52:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910326463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753358151] [2021-11-21 01:52:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:00,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:00,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:00,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:52:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:52:00,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:52:01,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:52:01,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753358151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:01,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:52:01,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:52:01,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570200900] [2021-11-21 01:52:01,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:01,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:52:01,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:52:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:52:01,009 INFO L87 Difference]: Start difference. First operand 8621 states and 13395 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:52:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:01,699 INFO L93 Difference]: Finished difference Result 12815 states and 19689 transitions. [2021-11-21 01:52:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:52:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-11-21 01:52:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:01,733 INFO L225 Difference]: With dead ends: 12815 [2021-11-21 01:52:01,733 INFO L226 Difference]: Without dead ends: 8639 [2021-11-21 01:52:01,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:52:01,747 INFO L933 BasicCegarLoop]: 3236 mSDtfsCounter, 108 mSDsluCounter, 3396 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 6399 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:01,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 6399 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:52:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2021-11-21 01:52:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 8491. [2021-11-21 01:52:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8491 states, 7428 states have (on average 1.5914108777598277) internal successors, (11821), 7445 states have internal predecessors, (11821), 632 states have call successors, (632), 430 states have call predecessors, (632), 429 states have return successors, (634), 616 states have call predecessors, (634), 632 states have call successors, (634) [2021-11-21 01:52:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8491 states to 8491 states and 13087 transitions. [2021-11-21 01:52:02,172 INFO L78 Accepts]: Start accepts. Automaton has 8491 states and 13087 transitions. Word has length 121 [2021-11-21 01:52:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:02,173 INFO L470 AbstractCegarLoop]: Abstraction has 8491 states and 13087 transitions. [2021-11-21 01:52:02,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:52:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8491 states and 13087 transitions. [2021-11-21 01:52:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:52:02,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:02,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:52:02,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:02,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:52:02,415 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 716319594, now seen corresponding path program 1 times [2021-11-21 01:52:02,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:02,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901924454] [2021-11-21 01:52:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:02,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:52:02,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:02,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901924454] [2021-11-21 01:52:02,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901924454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:02,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343378340] [2021-11-21 01:52:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:02,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:02,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:02,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:52:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:52:02,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:52:02,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:52:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343378340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:02,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:52:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:52:02,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098186375] [2021-11-21 01:52:02,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:02,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:52:02,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:52:02,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:52:02,931 INFO L87 Difference]: Start difference. First operand 8491 states and 13087 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:52:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:03,550 INFO L93 Difference]: Finished difference Result 12692 states and 19085 transitions. [2021-11-21 01:52:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:52:03,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2021-11-21 01:52:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:03,580 INFO L225 Difference]: With dead ends: 12692 [2021-11-21 01:52:03,580 INFO L226 Difference]: Without dead ends: 9188 [2021-11-21 01:52:03,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:52:03,595 INFO L933 BasicCegarLoop]: 3185 mSDtfsCounter, 3387 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:03,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3387 Valid, 3214 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:52:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9188 states. [2021-11-21 01:52:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9188 to 9188. [2021-11-21 01:52:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9188 states, 8034 states have (on average 1.5607418471496142) internal successors, (12539), 8051 states have internal predecessors, (12539), 662 states have call successors, (662), 491 states have call predecessors, (662), 490 states have return successors, (664), 646 states have call predecessors, (664), 662 states have call successors, (664) [2021-11-21 01:52:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9188 states to 9188 states and 13865 transitions. [2021-11-21 01:52:03,938 INFO L78 Accepts]: Start accepts. Automaton has 9188 states and 13865 transitions. Word has length 121 [2021-11-21 01:52:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:03,938 INFO L470 AbstractCegarLoop]: Abstraction has 9188 states and 13865 transitions. [2021-11-21 01:52:03,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:52:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9188 states and 13865 transitions. [2021-11-21 01:52:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:52:03,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:03,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:52:04,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:04,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:04,187 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash 669720649, now seen corresponding path program 1 times [2021-11-21 01:52:04,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564522880] [2021-11-21 01:52:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:04,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 01:52:04,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564522880] [2021-11-21 01:52:04,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564522880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928519733] [2021-11-21 01:52:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:04,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:04,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:04,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:52:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:52:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:52:04,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:52:04,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928519733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:04,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:52:04,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-21 01:52:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604487317] [2021-11-21 01:52:04,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:04,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:52:04,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:52:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:52:04,681 INFO L87 Difference]: Start difference. First operand 9188 states and 13865 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:52:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:05,617 INFO L93 Difference]: Finished difference Result 19335 states and 28052 transitions. [2021-11-21 01:52:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:52:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 122 [2021-11-21 01:52:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:05,657 INFO L225 Difference]: With dead ends: 19335 [2021-11-21 01:52:05,657 INFO L226 Difference]: Without dead ends: 11847 [2021-11-21 01:52:05,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:52:05,681 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 3605 mSDsluCounter, 6770 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3618 SdHoareTripleChecker+Valid, 9480 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:05,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3618 Valid, 9480 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:52:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11847 states. [2021-11-21 01:52:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11847 to 11845. [2021-11-21 01:52:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11845 states, 10237 states have (on average 1.514506202989157) internal successors, (15504), 10262 states have internal predecessors, (15504), 925 states have call successors, (925), 682 states have call predecessors, (925), 681 states have return successors, (927), 901 states have call predecessors, (927), 925 states have call successors, (927) [2021-11-21 01:52:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11845 states to 11845 states and 17356 transitions. [2021-11-21 01:52:06,351 INFO L78 Accepts]: Start accepts. Automaton has 11845 states and 17356 transitions. Word has length 122 [2021-11-21 01:52:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:06,351 INFO L470 AbstractCegarLoop]: Abstraction has 11845 states and 17356 transitions. [2021-11-21 01:52:06,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:52:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 11845 states and 17356 transitions. [2021-11-21 01:52:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-21 01:52:06,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:06,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:52:06,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:06,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:06,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash 895511468, now seen corresponding path program 1 times [2021-11-21 01:52:06,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:06,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137682351] [2021-11-21 01:52:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:06,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:52:06,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137682351] [2021-11-21 01:52:06,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137682351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87508654] [2021-11-21 01:52:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:06,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:06,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:06,684 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:06,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:52:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:52:06,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:52:07,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:52:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87508654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:07,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:52:07,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:52:07,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084257856] [2021-11-21 01:52:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:52:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:52:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:52:07,024 INFO L87 Difference]: Start difference. First operand 11845 states and 17356 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:52:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:07,845 INFO L93 Difference]: Finished difference Result 18972 states and 27564 transitions. [2021-11-21 01:52:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:52:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2021-11-21 01:52:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:07,878 INFO L225 Difference]: With dead ends: 18972 [2021-11-21 01:52:07,878 INFO L226 Difference]: Without dead ends: 11863 [2021-11-21 01:52:07,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:52:07,900 INFO L933 BasicCegarLoop]: 3261 mSDtfsCounter, 101 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:07,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6422 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:52:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11863 states. [2021-11-21 01:52:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11863 to 11715. [2021-11-21 01:52:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11715 states, 10107 states have (on average 1.4987632334025922) internal successors, (15148), 10132 states have internal predecessors, (15148), 925 states have call successors, (925), 682 states have call predecessors, (925), 681 states have return successors, (927), 901 states have call predecessors, (927), 925 states have call successors, (927) [2021-11-21 01:52:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11715 states to 11715 states and 17000 transitions. [2021-11-21 01:52:08,429 INFO L78 Accepts]: Start accepts. Automaton has 11715 states and 17000 transitions. Word has length 125 [2021-11-21 01:52:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:08,429 INFO L470 AbstractCegarLoop]: Abstraction has 11715 states and 17000 transitions. [2021-11-21 01:52:08,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:52:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11715 states and 17000 transitions. [2021-11-21 01:52:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-21 01:52:08,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:08,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 01:52:08,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:52:08,663 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1959948404, now seen corresponding path program 1 times [2021-11-21 01:52:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:08,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842147564] [2021-11-21 01:52:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:08,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:52:08,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842147564] [2021-11-21 01:52:08,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842147564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:52:08,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466532378] [2021-11-21 01:52:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:08,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:08,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:08,737 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:08,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed357d-d971-4f6c-bf4e-ea8bd69810d7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:52:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:52:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:52:09,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:52:09,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466532378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:09,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:52:09,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-21 01:52:09,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331364953] [2021-11-21 01:52:09,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:09,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:52:09,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:52:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:52:09,123 INFO L87 Difference]: Start difference. First operand 11715 states and 17000 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 01:52:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:10,058 INFO L93 Difference]: Finished difference Result 29700 states and 41308 transitions. [2021-11-21 01:52:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:52:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2021-11-21 01:52:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:10,147 INFO L225 Difference]: With dead ends: 29700 [2021-11-21 01:52:10,148 INFO L226 Difference]: Without dead ends: 19685 [2021-11-21 01:52:10,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:52:10,172 INFO L933 BasicCegarLoop]: 3254 mSDtfsCounter, 3399 mSDsluCounter, 3619 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 6611 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:10,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3399 Valid, 6611 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:52:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19685 states.