./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/parity.i --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_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/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_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/parity.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/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_69f45bf6-1c9e-4d74-b194-357b7c474351/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 d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:26,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:26,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:26,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:26,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:26,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:26,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:26,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:26,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:26,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:26,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:26,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:26,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:26,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:26,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:26,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:26,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:26,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:26,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:26,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:26,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:26,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:26,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:26,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:26,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:26,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:26,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:26,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:26,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:26,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:26,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:26,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:26,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:26,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:26,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:26,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:26,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:26,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:26,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:26,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:26,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:26,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:14:26,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:26,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:26,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:26,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:26,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:26,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:26,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:26,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:26,866 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:26,866 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:14:26,867 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:26,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:26,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:14:26,868 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:14:26,868 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:26,869 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:14:26,869 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:14:26,869 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:14:26,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:26,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:14:26,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:14:26,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:14:26,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:26,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:26,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:26,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:26,873 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:14:26,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:26,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:26,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:26,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:26,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:26,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:26,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:26,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:26,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:26,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:14:26,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:14:26,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:26,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:26,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:26,878 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_69f45bf6-1c9e-4d74-b194-357b7c474351/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2021-11-21 01:14:27,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:27,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:27,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:27,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:27,301 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:27,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/parity.i [2021-11-21 01:14:27,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/4c04b6d5c/34d81ed5d82b4efe9c7299a0bbf43f76/FLAG9be47734a [2021-11-21 01:14:28,001 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:28,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/sv-benchmarks/c/bitvector/parity.i [2021-11-21 01:14:28,011 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/4c04b6d5c/34d81ed5d82b4efe9c7299a0bbf43f76/FLAG9be47734a [2021-11-21 01:14:28,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/4c04b6d5c/34d81ed5d82b4efe9c7299a0bbf43f76 [2021-11-21 01:14:28,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:28,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:28,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:28,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:28,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:28,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2fa4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28, skipping insertion in model container [2021-11-21 01:14:28,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:28,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:28,680 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_69f45bf6-1c9e-4d74-b194-357b7c474351/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2021-11-21 01:14:28,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:28,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:28,765 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_69f45bf6-1c9e-4d74-b194-357b7c474351/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2021-11-21 01:14:28,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:28,821 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:28,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28 WrapperNode [2021-11-21 01:14:28,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:28,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:28,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:28,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:28,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,871 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-21 01:14:28,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:28,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:28,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:28,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:28,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:28,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:28,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:28,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:28,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (1/1) ... [2021-11-21 01:14:28,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:28,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:14:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:29,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:29,094 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:29,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:29,225 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:14:29,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:14:29,273 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:14:29,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:29 BoogieIcfgContainer [2021-11-21 01:14:29,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:14:29,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:14:29,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:14:29,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:14:29,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:28" (1/3) ... [2021-11-21 01:14:29,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c09237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:29, skipping insertion in model container [2021-11-21 01:14:29,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:28" (2/3) ... [2021-11-21 01:14:29,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c09237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:29, skipping insertion in model container [2021-11-21 01:14:29,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:29" (3/3) ... [2021-11-21 01:14:29,288 INFO L111 eAbstractionObserver]: Analyzing ICFG parity.i [2021-11-21 01:14:29,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:14:29,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:14:29,358 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:14:29,368 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 01:14:29,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:14:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:14:29,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:29,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:14:29,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2284362, now seen corresponding path program 1 times [2021-11-21 01:14:29,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:29,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444704242] [2021-11-21 01:14:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:29,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:14:29,540 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:14:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:14:29,592 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:14:29,594 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:14:29,596 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:14:29,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:14:29,605 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 01:14:29,609 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:14:29,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:14:29 BoogieIcfgContainer [2021-11-21 01:14:29,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:14:29,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:14:29,635 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:14:29,636 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:14:29,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:29" (3/4) ... [2021-11-21 01:14:29,640 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:14:29,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:14:29,642 INFO L158 Benchmark]: Toolchain (without parser) took 1272.84ms. Allocated memory is still 109.1MB. Free memory was 71.0MB in the beginning and 58.4MB in the end (delta: 12.6MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-11-21 01:14:29,643 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 109.1MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:14:29,644 INFO L158 Benchmark]: CACSL2BoogieTranslator took 451.75ms. Allocated memory is still 109.1MB. Free memory was 70.8MB in the beginning and 85.0MB in the end (delta: -14.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:14:29,645 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.35ms. Allocated memory is still 109.1MB. Free memory was 85.0MB in the beginning and 83.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:14:29,646 INFO L158 Benchmark]: Boogie Preprocessor took 44.91ms. Allocated memory is still 109.1MB. Free memory was 83.5MB in the beginning and 82.5MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:14:29,647 INFO L158 Benchmark]: RCFGBuilder took 358.09ms. Allocated memory is still 109.1MB. Free memory was 82.5MB in the beginning and 72.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:14:29,648 INFO L158 Benchmark]: TraceAbstraction took 354.78ms. Allocated memory is still 109.1MB. Free memory was 71.7MB in the beginning and 58.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 01:14:29,649 INFO L158 Benchmark]: Witness Printer took 5.82ms. Allocated memory is still 109.1MB. Free memory was 58.7MB in the beginning and 58.4MB in the end (delta: 344.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:14:29,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 109.1MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 451.75ms. Allocated memory is still 109.1MB. Free memory was 70.8MB in the beginning and 85.0MB in the end (delta: -14.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.35ms. Allocated memory is still 109.1MB. Free memory was 85.0MB in the beginning and 83.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.91ms. Allocated memory is still 109.1MB. Free memory was 83.5MB in the beginning and 82.5MB in the end (delta: 1.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 358.09ms. Allocated memory is still 109.1MB. Free memory was 82.5MB in the beginning and 72.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 354.78ms. Allocated memory is still 109.1MB. Free memory was 71.7MB in the beginning and 58.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.82ms. Allocated memory is still 109.1MB. Free memory was 58.7MB in the beginning and 58.4MB in the end (delta: 344.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 61, overapproximation of bitwiseXor at line 59. Possible FailurePath: [L42] unsigned int v = __VERIFIER_nondet_uint(); [L43] unsigned int v1; [L44] unsigned int v2; [L45] char parity1; [L46] char parity2; [L47] v1 = v [L48] parity1 = (char)0 VAL [parity1=0, v=0, v1=0] [L49] COND FALSE !(v1 != 0) [L57] v2 = v [L58] parity2 = (char)0 [L59] v2 = v2 ^ (v2 >> 1u) [L60] v2 = v2 ^ (v2 >> 2u) [L61] v2 = (v2 & 286331153U) * 286331153U [L62] COND FALSE !(((v2 >> 28u) & 1u) == 0) [L65] parity2 = (char)1 [L67] CALL __VERIFIER_assert(parity1 == parity2) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 01:14:29,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/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_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/parity.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/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 d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:32,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:32,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:32,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:32,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:32,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:32,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:32,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:32,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:32,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:32,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:32,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:32,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:32,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:32,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:32,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:32,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:32,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:32,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:32,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:32,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:32,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:32,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:32,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:32,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:32,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:32,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:32,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:32,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:32,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:32,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:32,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:32,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:32,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:32,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:32,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:32,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:32,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:32,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:32,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:32,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:32,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:14:33,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:33,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:33,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:33,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:33,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:33,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:33,021 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:33,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:33,023 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:33,023 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:33,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:33,029 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:33,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:33,031 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:14:33,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:14:33,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:33,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:33,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:33,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:33,033 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:14:33,033 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:14:33,034 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:14:33,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:33,034 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:33,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:33,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:33,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:14:33,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:33,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:33,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:33,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:33,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:33,037 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:14:33,038 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:14:33,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:33,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:33,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:33,039 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_69f45bf6-1c9e-4d74-b194-357b7c474351/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2021-11-21 01:14:33,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:33,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:33,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:33,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:33,632 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:33,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/parity.i [2021-11-21 01:14:33,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/c0e506435/3a7693e513c64c5f8d49f8c4f3afb387/FLAG6d8aeb665 [2021-11-21 01:14:34,357 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:34,358 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/sv-benchmarks/c/bitvector/parity.i [2021-11-21 01:14:34,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/c0e506435/3a7693e513c64c5f8d49f8c4f3afb387/FLAG6d8aeb665 [2021-11-21 01:14:34,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/data/c0e506435/3a7693e513c64c5f8d49f8c4f3afb387 [2021-11-21 01:14:34,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:34,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:34,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:34,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:34,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:34,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:34,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e4d5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34, skipping insertion in model container [2021-11-21 01:14:34,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:34,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:34,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:34,896 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_69f45bf6-1c9e-4d74-b194-357b7c474351/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2021-11-21 01:14:34,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:34,928 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:34,946 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_69f45bf6-1c9e-4d74-b194-357b7c474351/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2021-11-21 01:14:34,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:34,974 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:34,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34 WrapperNode [2021-11-21 01:14:34,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:34,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:34,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:34,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:34,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:34,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,031 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-21 01:14:35,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:35,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:35,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:35,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:35,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:35,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:35,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:35,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:35,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (1/1) ... [2021-11-21 01:14:35,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:35,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:35,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:35,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:35,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:14:35,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:35,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:35,327 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:35,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:35,477 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:14:35,483 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:14:35,483 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:14:35,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:35 BoogieIcfgContainer [2021-11-21 01:14:35,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:14:35,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:14:35,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:14:35,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:14:35,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:34" (1/3) ... [2021-11-21 01:14:35,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daa023f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:35, skipping insertion in model container [2021-11-21 01:14:35,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:34" (2/3) ... [2021-11-21 01:14:35,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daa023f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:35, skipping insertion in model container [2021-11-21 01:14:35,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:35" (3/3) ... [2021-11-21 01:14:35,496 INFO L111 eAbstractionObserver]: Analyzing ICFG parity.i [2021-11-21 01:14:35,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:14:35,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:14:35,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:14:35,575 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 01:14:35,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:14:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:14:35,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:35,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:35,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash 561227051, now seen corresponding path program 1 times [2021-11-21 01:14:35,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925734840] [2021-11-21 01:14:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:35,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:35,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:35,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:14:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:14:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:35,843 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 01:14:35,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:35,919 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 01:14:35,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:35,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925734840] [2021-11-21 01:14:35,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925734840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:35,929 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:14:35,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245938541] [2021-11-21 01:14:35,933 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:35,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:14:35,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:14:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:14:35,987 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:36,012 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-11-21 01:14:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:14:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:14:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:36,029 INFO L225 Difference]: With dead ends: 25 [2021-11-21 01:14:36,029 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 01:14:36,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:14:36,037 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:36,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:14:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 01:14:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 01:14:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 01:14:36,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 01:14:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:36,082 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 01:14:36,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 01:14:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:14:36,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:36,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:36,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:36,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:14:36,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash 246306390, now seen corresponding path program 1 times [2021-11-21 01:14:36,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:36,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630385226] [2021-11-21 01:14:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:36,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:36,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:36,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:14:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:36,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:14:36,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:36,599 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 01:14:36,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:36,693 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 01:14:36,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630385226] [2021-11-21 01:14:36,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630385226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:36,695 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:36,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-21 01:14:36,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422381716] [2021-11-21 01:14:36,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:36,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:14:36,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:14:36,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:36,711 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:36,782 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-21 01:14:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:14:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:36,784 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:14:36,784 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 01:14:36,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:36,787 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:36,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:14:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 01:14:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-11-21 01:14:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-21 01:14:36,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2021-11-21 01:14:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:36,804 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-21 01:14:36,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-21 01:14:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:14:36,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:36,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:36,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:37,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:14:37,038 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 246365972, now seen corresponding path program 1 times [2021-11-21 01:14:37,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:37,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995429641] [2021-11-21 01:14:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:37,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:37,043 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:37,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:14:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:14:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:37,136 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 01:14:37,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:37,437 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 01:14:37,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995429641] [2021-11-21 01:14:37,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995429641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:37,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:37,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 01:14:37,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333603080] [2021-11-21 01:14:37,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:37,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:14:37,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:14:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:37,441 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:37,545 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-21 01:14:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:14:37,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:14:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:37,558 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:14:37,559 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 01:14:37,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:14:37,561 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:37,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 01:14:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-11-21 01:14:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-21 01:14:37,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-11-21 01:14:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:37,580 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-21 01:14:37,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-21 01:14:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:14:37,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:37,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:37,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:37,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:14:37,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -967615425, now seen corresponding path program 1 times [2021-11-21 01:14:37,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:37,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764255599] [2021-11-21 01:14:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:37,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:37,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:37,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:37,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:14:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:37,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:14:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:38,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:39,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:39,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764255599] [2021-11-21 01:14:39,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764255599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:39,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [41406995] [2021-11-21 01:14:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:39,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:14:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:14:39,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:14:39,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 01:14:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:14:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:39,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:39,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [41406995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:39,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494618231] [2021-11-21 01:14:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:39,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:39,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:39,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:14:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:14:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:40,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:40,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494618231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:40,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:14:40,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-21 01:14:40,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018518607] [2021-11-21 01:14:40,381 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:14:40,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:14:40,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:14:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:14:40,383 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:41,234 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-11-21 01:14:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:14:41,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:14:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:41,238 INFO L225 Difference]: With dead ends: 45 [2021-11-21 01:14:41,238 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 01:14:41,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:14:41,240 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:41,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 2 Unchecked, 0.6s Time] [2021-11-21 01:14:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 01:14:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2021-11-21 01:14:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-21 01:14:41,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2021-11-21 01:14:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:41,256 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-21 01:14:41,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-21 01:14:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:14:41,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:41,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:41,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:41,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:41,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:41,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:14:41,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -967555843, now seen corresponding path program 1 times [2021-11-21 01:14:41,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:41,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473961912] [2021-11-21 01:14:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:41,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:41,863 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:41,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:14:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:14:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:41,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:42,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473961912] [2021-11-21 01:14:42,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473961912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:42,043 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:42,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-21 01:14:42,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692812902] [2021-11-21 01:14:42,043 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:42,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:14:42,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:14:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:42,047 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:42,136 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-11-21 01:14:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:14:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:42,138 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:14:42,138 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 01:14:42,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:42,140 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:42,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 60 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:14:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 01:14:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-21 01:14:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-21 01:14:42,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2021-11-21 01:14:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:42,161 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-21 01:14:42,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-21 01:14:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:14:42,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:42,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:42,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:42,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:14:42,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2097060814, now seen corresponding path program 1 times [2021-11-21 01:14:42,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:42,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880827211] [2021-11-21 01:14:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:42,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:42,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:42,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:14:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:14:42,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:43,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:45,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:14:45,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880827211] [2021-11-21 01:14:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880827211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:45,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628934704] [2021-11-21 01:14:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:45,071 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:14:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:14:45,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:14:45,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:14:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:14:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:45,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:45,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628934704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080027327] [2021-11-21 01:14:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:45,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:45,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:45,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:14:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:14:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080027327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:46,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:14:46,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 8, 8] total 16 [2021-11-21 01:14:46,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850332520] [2021-11-21 01:14:46,714 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:14:46,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:14:46,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:14:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:14:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:14:46,716 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:48,241 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-11-21 01:14:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:14:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:14:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:48,243 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:14:48,243 INFO L226 Difference]: Without dead ends: 33 [2021-11-21 01:14:48,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:14:48,246 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:48,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 2 Unchecked, 0.7s Time] [2021-11-21 01:14:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-21 01:14:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-11-21 01:14:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-21 01:14:48,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 14 [2021-11-21 01:14:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:48,253 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-21 01:14:48,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-21 01:14:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:14:48,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:48,269 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:48,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:48,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-21 01:14:48,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:48,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:14:48,872 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1350338813, now seen corresponding path program 1 times [2021-11-21 01:14:48,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:14:48,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340592998] [2021-11-21 01:14:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:48,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:14:48,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:14:48,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:14:48,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:14:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:14:49,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:51,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:07,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:15:07,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340592998] [2021-11-21 01:15:07,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340592998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:07,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207267853] [2021-11-21 01:15:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:07,779 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:15:07,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:15:07,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:15:07,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-21 01:15:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:15:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:15,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:16,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207267853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:16,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208546074] [2021-11-21 01:15:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:16,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:15:16,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:15:16,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:15:16,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:15:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:15:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:17,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:15:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:19,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208546074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:15:19,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:15:19,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11, 11, 14, 11] total 28 [2021-11-21 01:15:19,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436408731] [2021-11-21 01:15:19,088 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:15:19,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:15:19,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:15:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:15:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:15:19,090 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:20,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:22,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:24,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:15:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:50,104 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-11-21 01:15:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:15:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-21 01:15:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:50,108 INFO L225 Difference]: With dead ends: 62 [2021-11-21 01:15:50,108 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 01:15:50,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:15:50,110 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:50,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 160 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 211 Invalid, 0 Unknown, 2 Unchecked, 5.6s Time] [2021-11-21 01:15:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 01:15:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-21 01:15:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-21 01:15:50,121 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 23 [2021-11-21 01:15:50,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:50,122 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-21 01:15:50,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:50,122 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-21 01:15:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:15:50,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:50,124 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:50,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:50,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:15:50,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-21 01:15:50,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:15:50,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash -671341842, now seen corresponding path program 2 times [2021-11-21 01:15:50,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:15:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288938789] [2021-11-21 01:15:50,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:15:50,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:15:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:15:50,748 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:15:50,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:15:50,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:15:50,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:15:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:15:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:15:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:54,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:20,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:16:20,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288938789] [2021-11-21 01:16:20,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288938789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:20,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634135361] [2021-11-21 01:16:20,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:16:20,093 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:16:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:16:20,106 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:16:20,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 01:16:20,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:16:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:16:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:16:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634135361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:33,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531629575] [2021-11-21 01:16:33,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:16:33,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:16:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:16:33,021 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:16:33,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:16:34,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:16:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:16:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:16:34,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:16:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:16:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:36,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531629575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:16:36,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:16:36,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 13, 12, 17, 12] total 31 [2021-11-21 01:16:36,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862165279] [2021-11-21 01:16:36,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:16:36,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:16:36,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:16:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:16:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:16:36,420 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:38,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:40,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:16:41,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:17:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:11,361 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-11-21 01:17:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-21 01:17:11,364 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-21 01:17:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:11,365 INFO L225 Difference]: With dead ends: 65 [2021-11-21 01:17:11,365 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 01:17:11,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=330, Invalid=1391, Unknown=1, NotChecked=0, Total=1722 [2021-11-21 01:17:11,367 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:11,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 171 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 204 Invalid, 0 Unknown, 20 Unchecked, 6.5s Time] [2021-11-21 01:17:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 01:17:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-11-21 01:17:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-21 01:17:11,378 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 26 [2021-11-21 01:17:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:11,378 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-21 01:17:11,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-21 01:17:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:17:11,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:11,381 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:11,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:11,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:11,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:17:11,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:17:11,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1314219381, now seen corresponding path program 2 times [2021-11-21 01:17:11,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:17:11,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343788064] [2021-11-21 01:17:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:17:11,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:17:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:17:11,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:17:11,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:17:12,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:17:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:17:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 01:17:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:17:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:35,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:46,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:21:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343788064] [2021-11-21 01:21:46,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343788064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:21:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888170710] [2021-11-21 01:21:46,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:21:46,383 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:21:46,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:21:46,385 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:21:46,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-21 01:21:46,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:21:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:21:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:21:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:23:55,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:23:59,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888170710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:23:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361568121] [2021-11-21 01:23:59,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:23:59,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:59,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:59,580 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:59,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f45bf6-1c9e-4d74-b194-357b7c474351/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:24:04,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:24:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:24:04,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:24:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:46,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361568121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:46,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:25:46,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 20, 19, 23, 19] total 67 [2021-11-21 01:25:46,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482361648] [2021-11-21 01:25:46,920 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:25:46,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-21 01:25:46,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:25:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-21 01:25:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3872, Unknown=87, NotChecked=0, Total=4422 [2021-11-21 01:25:46,926 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 67 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 67 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:52,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:01,225 WARN L227 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 60 DAG size of output: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:26:08,936 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 52 DAG size of output: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:26:11,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:18,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:25,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:40,863 WARN L227 SmtUtils]: Spent 11.63s on a formula simplification. DAG size of input: 64 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:26:52,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:27:13,973 WARN L227 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 60 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:27:16,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:27:18,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:27:20,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:27:22,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:27:25,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:27:53,930 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 72 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:28:02,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:28:20,674 WARN L227 SmtUtils]: Spent 15.64s on a formula simplification. DAG size of input: 80 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:28:45,557 WARN L227 SmtUtils]: Spent 21.96s on a formula simplification. DAG size of input: 68 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)