./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl --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 b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:11,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:11,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:11,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:11,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:11,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:11,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:11,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:11,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:11,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:11,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:11,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:11,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:11,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:11,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:11,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:11,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:11,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:11,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:11,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:11,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:11,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:11,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:11,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:11,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:11,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:11,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:11,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:11,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:11,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:11,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:11,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:11,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:11,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:11,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:11,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:11,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:11,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:11,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:11,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:11,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:11,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:35:11,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:11,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:11,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:11,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:11,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:11,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:11,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:11,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:11,953 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:11,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:35:11,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:11,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:11,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:35:11,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:35:11,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:11,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:35:11,955 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:35:11,956 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:35:11,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:11,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:11,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:35:11,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:11,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:11,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:35:11,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:11,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:35:11,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:11,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:35:11,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:11,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:35:11,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:11,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:11,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:11,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:11,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:11,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:35:11,961 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:35:11,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:35:11,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:35:11,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:11,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:11,962 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_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2021-11-23 17:35:12,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:12,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:12,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:12,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:12,329 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:12,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/sina1.c [2021-11-23 17:35:12,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/974539850/07b2439f69bb4c0ea5e3fd8be2813a2b/FLAG7c79e1fae [2021-11-23 17:35:12,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:12,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/sv-benchmarks/c/array-fpi/sina1.c [2021-11-23 17:35:12,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/974539850/07b2439f69bb4c0ea5e3fd8be2813a2b/FLAG7c79e1fae [2021-11-23 17:35:13,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/974539850/07b2439f69bb4c0ea5e3fd8be2813a2b [2021-11-23 17:35:13,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:13,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:13,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:13,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:13,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:13,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3872a917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13, skipping insertion in model container [2021-11-23 17:35:13,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:13,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:13,584 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_319c22a8-476e-4bcf-afed-e41654edf32a/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-23 17:35:13,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:13,616 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:13,637 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_319c22a8-476e-4bcf-afed-e41654edf32a/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-23 17:35:13,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:13,669 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:13,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13 WrapperNode [2021-11-23 17:35:13,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:13,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:13,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:13,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:13,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,714 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-11-23 17:35:13,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:13,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:13,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:13,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:13,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:13,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:13,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:13,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:13,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:13" (1/1) ... [2021-11-23 17:35:13,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:13,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:13,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:35:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:35:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:35:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:35:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:35:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:35:13,914 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:13,916 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:14,136 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:14,160 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:35:14,165 INFO L158 Benchmark]: Toolchain (without parser) took 852.50ms. Allocated memory is still 96.5MB. Free memory was 58.4MB in the beginning and 58.1MB in the end (delta: 320.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:14,166 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 96.5MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:14,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.25ms. Allocated memory is still 96.5MB. Free memory was 58.2MB in the beginning and 71.6MB in the end (delta: -13.4MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-11-23 17:35:14,169 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.04ms. Allocated memory is still 96.5MB. Free memory was 71.6MB in the beginning and 70.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:14,171 INFO L158 Benchmark]: Boogie Preprocessor took 32.17ms. Allocated memory is still 96.5MB. Free memory was 70.0MB in the beginning and 68.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:14,173 INFO L158 Benchmark]: RCFGBuilder took 414.88ms. Allocated memory is still 96.5MB. Free memory was 68.6MB in the beginning and 58.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:35:14,178 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 96.5MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.25ms. Allocated memory is still 96.5MB. Free memory was 58.2MB in the beginning and 71.6MB in the end (delta: -13.4MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.04ms. Allocated memory is still 96.5MB. Free memory was 71.6MB in the beginning and 70.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.17ms. Allocated memory is still 96.5MB. Free memory was 70.0MB in the beginning and 68.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 414.88ms. Allocated memory is still 96.5MB. Free memory was 68.6MB in the beginning and 58.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:35:14,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/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_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl --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 b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:17,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:17,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:17,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:17,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:17,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:17,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:17,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:17,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:17,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:17,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:17,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:17,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:17,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:17,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:17,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:17,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:17,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:17,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:17,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:17,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:17,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:17,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:17,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:17,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:17,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:17,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:17,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:17,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:17,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:17,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:17,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:17,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:17,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:17,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:17,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:17,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:17,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:17,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:17,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:17,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:17,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:35:17,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:17,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:17,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:17,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:17,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:17,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:17,444 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:17,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:17,445 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:17,445 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:17,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:17,446 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:17,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:17,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:17,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:17,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:17,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:35:17,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:17,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:35:17,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:35:17,449 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:35:17,450 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:35:17,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:17,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:35:17,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:17,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:35:17,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:17,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:35:17,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:17,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:17,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:17,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:17,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:35:17,454 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:35:17,454 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:17,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:35:17,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:17,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:17,455 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_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2021-11-23 17:35:17,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:18,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:18,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:18,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:18,034 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:18,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/sina1.c [2021-11-23 17:35:18,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/a520c739d/1772ade47e664783844148b26dfb3af8/FLAGe44aa620f [2021-11-23 17:35:18,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:18,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/sv-benchmarks/c/array-fpi/sina1.c [2021-11-23 17:35:18,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/a520c739d/1772ade47e664783844148b26dfb3af8/FLAGe44aa620f [2021-11-23 17:35:19,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/data/a520c739d/1772ade47e664783844148b26dfb3af8 [2021-11-23 17:35:19,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:19,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:19,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:19,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:19,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:19,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db5e906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19, skipping insertion in model container [2021-11-23 17:35:19,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:19,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:19,314 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_319c22a8-476e-4bcf-afed-e41654edf32a/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-23 17:35:19,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:19,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:19,394 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_319c22a8-476e-4bcf-afed-e41654edf32a/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-23 17:35:19,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:19,457 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:19,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19 WrapperNode [2021-11-23 17:35:19,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:19,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:19,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:19,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:19,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,533 INFO L137 Inliner]: procedures = 19, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2021-11-23 17:35:19,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:19,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:19,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:19,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:19,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:19,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:19,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:19,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:19,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:19,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:19,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:35:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:35:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:35:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:35:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:19,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:19,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:35:19,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:35:19,841 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:19,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:20,067 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:20,074 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:35:20,075 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:35:20,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:35:20 BoogieIcfgContainer [2021-11-23 17:35:20,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:35:20,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:35:20,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:35:20,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:35:20,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:35:19" (1/3) ... [2021-11-23 17:35:20,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b614df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:35:20, skipping insertion in model container [2021-11-23 17:35:20,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (2/3) ... [2021-11-23 17:35:20,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b614df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:35:20, skipping insertion in model container [2021-11-23 17:35:20,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:35:20" (3/3) ... [2021-11-23 17:35:20,099 INFO L111 eAbstractionObserver]: Analyzing ICFG sina1.c [2021-11-23 17:35:20,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:35:20,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:35:20,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:35:20,179 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 [2021-11-23 17:35:20,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:35:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:35:20,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:20,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:20,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-23 17:35:20,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500111928] [2021-11-23 17:35:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:20,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:20,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:20,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:35:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:35:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:20,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:20,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:20,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500111928] [2021-11-23 17:35:20,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500111928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:20,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:20,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:35:20,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507156195] [2021-11-23 17:35:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:20,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:35:20,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:35:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:35:20,518 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 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) [2021-11-23 17:35:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:20,537 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-23 17:35:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:35:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 12 [2021-11-23 17:35:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:20,551 INFO L225 Difference]: With dead ends: 38 [2021-11-23 17:35:20,552 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 17:35:20,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:35:20,561 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-11-23 17:35:20,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:35:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 17:35:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 17:35:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-11-23 17:35:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 17:35:20,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-23 17:35:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:20,610 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 17:35:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-11-23 17:35:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 17:35:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:35:20,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:20,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:20,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:35:20,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:20,826 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-23 17:35:20,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:20,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733085260] [2021-11-23 17:35:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:20,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:20,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:20,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:35:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:35:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:21,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:21,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733085260] [2021-11-23 17:35:21,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733085260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:21,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:21,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:35:21,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270838550] [2021-11-23 17:35:21,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:21,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:35:21,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:35:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:35:21,279 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-11-23 17:35:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:21,502 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-23 17:35:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:35:21,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 12 [2021-11-23 17:35:21,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:21,505 INFO L225 Difference]: With dead ends: 37 [2021-11-23 17:35:21,505 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 17:35:21,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:35:21,508 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:21,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:35:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 17:35:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-23 17:35:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 17:35:21,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-23 17:35:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:21,527 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 17:35:21,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-11-23 17:35:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 17:35:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:35:21,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:21,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:21,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:21,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:21,745 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-23 17:35:21,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787330243] [2021-11-23 17:35:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:21,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:21,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:21,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:35:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:35:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:21,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:35:22,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:35:22,320 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:35:22,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:35:22,592 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 17:35:22,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-11-23 17:35:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:22,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:40,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787330243] [2021-11-23 17:35:40,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787330243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792699391] [2021-11-23 17:35:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:40,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:40,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:40,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:35:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:35:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:40,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:35:40,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:35:40,957 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:35:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:35:41,331 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 17:35:41,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-11-23 17:35:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:41,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1792699391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736023346] [2021-11-23 17:36:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:09,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:09,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:09,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:36:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:36:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:36:09,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:36:10,396 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:36:10,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-23 17:36:10,632 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 17:36:10,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-11-23 17:36:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:10,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:10,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736023346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:10,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:10,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 12, 12] total 33 [2021-11-23 17:36:10,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777671401] [2021-11-23 17:36:10,793 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:10,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:36:10,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:36:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=859, Unknown=19, NotChecked=0, Total=1056 [2021-11-23 17:36:10,799 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:13,920 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvule c_~N~0 (_ bv536870911 32)))) (and (forall ((|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32))) (= c_~N~0 (select (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |ULTIMATE.start_main_~a~0#1.offset|))) .cse0 (or (and .cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (not .cse0))) (forall ((|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32))) (= c_~N~0 (select (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= c_~N~0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (not (bvsle c_~N~0 (_ bv0 32))))) is different from false [2021-11-23 17:36:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:14,112 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-11-23 17:36:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 17:36:14,113 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:36:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:14,114 INFO L225 Difference]: With dead ends: 45 [2021-11-23 17:36:14,114 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 17:36:14,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=334, Invalid=1542, Unknown=20, NotChecked=84, Total=1980 [2021-11-23 17:36:14,118 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:14,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 69 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 118 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2021-11-23 17:36:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 17:36:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-11-23 17:36:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-23 17:36:14,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2021-11-23 17:36:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:14,130 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-23 17:36:14,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-23 17:36:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:36:14,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:14,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:14,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:14,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:36:14,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:36:14,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:14,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-11-23 17:36:14,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:14,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684960880] [2021-11-23 17:36:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:14,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:14,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:14,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:36:14,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:14,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:36:14,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:15,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:15,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684960880] [2021-11-23 17:36:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684960880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717084224] [2021-11-23 17:36:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:15,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:15,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:15,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:36:15,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:15,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:36:15,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:15,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:15,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717084224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947126954] [2021-11-23 17:36:15,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:15,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:15,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:15,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:15,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:36:15,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:15,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:15,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:36:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:16,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947126954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:16,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:16,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2021-11-23 17:36:16,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910166094] [2021-11-23 17:36:16,158 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:16,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:36:16,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:16,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:36:16,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:36:16,160 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:16,859 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-11-23 17:36:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:36:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 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 18 [2021-11-23 17:36:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:16,861 INFO L225 Difference]: With dead ends: 66 [2021-11-23 17:36:16,861 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 17:36:16,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:36:16,864 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:16,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 57 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:36:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 17:36:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2021-11-23 17:36:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-23 17:36:16,874 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2021-11-23 17:36:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:16,874 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-23 17:36:16,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-23 17:36:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:36:16,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:16,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:16,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:17,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:17,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:17,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:17,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-11-23 17:36:17,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146278780] [2021-11-23 17:36:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:36:17,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:17,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:17,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:36:17,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:36:17,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:36:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:17,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:36:17,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:36:17,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:36:18,218 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:36:18,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:36:18,449 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 17:36:18,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:36:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:36:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:18,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:36,131 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:36:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 1 [2021-11-23 17:36:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:36,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:36,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146278780] [2021-11-23 17:36:36,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146278780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:36,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [910447785] [2021-11-23 17:36:36,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:36:36,145 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:36,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:36,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:36,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:36:36,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:36:36,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580064663] [2021-11-23 17:36:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:36:36,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:36,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:36,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-23 17:36:36,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:36:36,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:36:36,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:36:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:36,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:36:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:36:36,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:36:37,521 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:36:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:36:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:36:38,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:36:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:10,009 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:37:10,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-11-23 17:37:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:10,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580064663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:10,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:37:10,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14] total 48 [2021-11-23 17:37:10,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633025589] [2021-11-23 17:37:10,021 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:10,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 17:37:10,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 17:37:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1937, Unknown=20, NotChecked=0, Total=2256 [2021-11-23 17:37:10,030 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:09,293 WARN L227 SmtUtils]: Spent 14.91s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:38:14,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:38:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:15,203 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-11-23 17:38:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 17:38:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 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 20 [2021-11-23 17:38:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:15,206 INFO L225 Difference]: With dead ends: 95 [2021-11-23 17:38:15,207 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 17:38:15,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 113.1s TimeCoverageRelationStatistics Valid=731, Invalid=5082, Unknown=39, NotChecked=0, Total=5852 [2021-11-23 17:38:15,212 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:15,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 200 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 156 Invalid, 1 Unknown, 451 Unchecked, 2.4s Time] [2021-11-23 17:38:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 17:38:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2021-11-23 17:38:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-11-23 17:38:15,229 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 20 [2021-11-23 17:38:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:15,230 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-11-23 17:38:15,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-11-23 17:38:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:38:15,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:15,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:15,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:15,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:15,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:15,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 4 times [2021-11-23 17:38:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509857399] [2021-11-23 17:38:15,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:38:15,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:15,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:15,649 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:15,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:38:15,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:38:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:38:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:16,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509857399] [2021-11-23 17:38:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509857399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167172484] [2021-11-23 17:38:16,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:38:16,675 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:16,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:16,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:38:16,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:38:16,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:38:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:17,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:17,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [167172484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470286407] [2021-11-23 17:38:17,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:38:17,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:17,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:17,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:17,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:38:17,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:38:17,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:38:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:17,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:18,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470286407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:18,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:18,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11, 10, 12, 12] total 35 [2021-11-23 17:38:18,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332871431] [2021-11-23 17:38:18,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:18,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 17:38:18,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 17:38:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:38:18,653 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:22,624 INFO L93 Difference]: Finished difference Result 166 states and 185 transitions. [2021-11-23 17:38:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 17:38:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 17:38:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:22,627 INFO L225 Difference]: With dead ends: 166 [2021-11-23 17:38:22,628 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 17:38:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=791, Invalid=2869, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 17:38:22,631 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 415 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:22,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 278 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:38:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 17:38:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 70. [2021-11-23 17:38:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-11-23 17:38:22,654 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 22 [2021-11-23 17:38:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:22,655 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-11-23 17:38:22,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-11-23 17:38:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 17:38:22,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:22,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:22,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:22,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:23,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:23,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:23,260 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 1 times [2021-11-23 17:38:23,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:23,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194382096] [2021-11-23 17:38:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:23,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:23,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:23,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:23,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:38:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:38:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:23,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:38:23,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:38:23,547 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:38:23,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 17:38:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:23,651 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:38:23,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 17:38:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:38:24,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:26,667 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse1 (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (bvadd (_ bv4 32) .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2021-11-23 17:38:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-11-23 17:38:26,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:26,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194382096] [2021-11-23 17:38:26,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194382096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400380719] [2021-11-23 17:38:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:26,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:26,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:26,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:38:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:38:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:26,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:38:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:38:27,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:38:27,612 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:38:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:38:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-11-23 17:38:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:38:29,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400380719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117407570] [2021-11-23 17:38:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:29,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:29,779 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:29,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:38:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:38:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:38:30,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:38:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:38:30,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:38:31,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:38:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 17:38:32,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-11-23 17:38:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:32,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:32,973 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= c_~N~0 (select (store v_ArrVal_289 (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_289) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-23 17:38:32,990 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_289) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) is different from false [2021-11-23 17:38:34,247 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:38:34,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2021-11-23 17:38:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 17:38:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117407570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:34,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14, 11, 16, 15] total 56 [2021-11-23 17:38:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061536454] [2021-11-23 17:38:34,261 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 17:38:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 17:38:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2497, Unknown=4, NotChecked=312, Total=3080 [2021-11-23 17:38:34,267 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 56 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:37,675 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse1 (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (bvadd (_ bv4 32) .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (= (_ bv2 32) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (= (_ bv0 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (bvslt (_ bv1 32) c_~N~0) (exists ((|#StackHeapBarrier| (_ BitVec 32))) (and (bvult |#StackHeapBarrier| |c_ULTIMATE.start_main_~#sum~0#1.base|) (bvult |c_ULTIMATE.start_main_~a~0#1.base| |#StackHeapBarrier|))) (not (bvslt (_ bv2 32) c_~N~0)) (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= c_~N~0 (select (store v_ArrVal_289 (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_289) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-23 17:38:38,045 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= c_~N~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_289) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-23 17:38:38,351 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse1 (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (bvadd (_ bv4 32) .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (= (_ bv0 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (forall ((v_ArrVal_289 (Array (_ BitVec 32) (_ BitVec 32)))) (= c_~N~0 (select (store v_ArrVal_289 (bvadd (_ bv4 32) (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_289) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-23 17:38:45,840 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (let ((.cse1 (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (bvadd (_ bv4 32) .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (= (_ bv0 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32))) is different from false [2021-11-23 17:38:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:48,488 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-11-23 17:38:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 17:38:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 56 states have internal predecessors, (94), 0 states have call successors, (0), 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 24 [2021-11-23 17:38:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:48,491 INFO L225 Difference]: With dead ends: 104 [2021-11-23 17:38:48,491 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 17:38:48,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=653, Invalid=6674, Unknown=11, NotChecked=1218, Total=8556 [2021-11-23 17:38:48,496 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:48,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 207 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2021-11-23 17:38:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 17:38:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-11-23 17:38:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-11-23 17:38:48,524 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 24 [2021-11-23 17:38:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:48,525 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-11-23 17:38:48,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 56 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-11-23 17:38:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 17:38:48,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:48,527 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:48,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:48,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:48,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 17:38:49,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:49,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1407751726, now seen corresponding path program 5 times [2021-11-23 17:38:49,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:49,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110921184] [2021-11-23 17:38:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:38:49,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:49,153 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:49,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:38:49,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 17:38:49,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:38:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:49,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:50,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110921184] [2021-11-23 17:38:50,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110921184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [145977009] [2021-11-23 17:38:50,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:38:50,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:50,385 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:50,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:38:50,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 17:38:50,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:38:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:38:50,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:38:50,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [145977009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:50,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213696985] [2021-11-23 17:38:50,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:38:50,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:50,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:50,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:50,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:38:51,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 17:38:51,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:38:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:38:51,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:38:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213696985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:51,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:51,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7, 8, 8, 7] total 33 [2021-11-23 17:38:51,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696963463] [2021-11-23 17:38:51,441 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:51,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:38:51,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:38:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:38:51,444 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:53,610 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-11-23 17:38:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:38:53,611 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 24 [2021-11-23 17:38:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:53,612 INFO L225 Difference]: With dead ends: 138 [2021-11-23 17:38:53,612 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 17:38:53,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=718, Invalid=2252, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 17:38:53,614 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 494 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:53,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 238 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 17:38:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 17:38:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2021-11-23 17:38:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-11-23 17:38:53,633 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 24 [2021-11-23 17:38:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:53,633 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-11-23 17:38:53,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:53,634 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-11-23 17:38:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:38:53,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:53,636 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:53,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:53,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:54,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-23 17:38:54,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:54,238 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1983767408, now seen corresponding path program 6 times [2021-11-23 17:38:54,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488873640] [2021-11-23 17:38:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:38:54,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:54,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:54,241 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:54,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:38:54,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 17:38:54,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:38:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:54,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:55,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488873640] [2021-11-23 17:38:55,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488873640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602800063] [2021-11-23 17:38:55,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:38:55,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:55,815 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:55,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:38:55,988 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:38:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878725258] [2021-11-23 17:38:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:38:55,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:55,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 1 [2021-11-23 17:38:55,994 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:55,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:38:56,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 17:38:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:38:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:57,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878725258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:57,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:38:57,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13, 11] total 42 [2021-11-23 17:38:57,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188522749] [2021-11-23 17:38:57,578 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:57,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 17:38:57,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 17:38:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1365, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 17:38:57,581 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:03,335 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2021-11-23 17:39:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 17:39:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2021-11-23 17:39:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:03,338 INFO L225 Difference]: With dead ends: 193 [2021-11-23 17:39:03,338 INFO L226 Difference]: Without dead ends: 172 [2021-11-23 17:39:03,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 17:39:03,342 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 515 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:03,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 395 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 17:39:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-23 17:39:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 71. [2021-11-23 17:39:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-11-23 17:39:03,380 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 26 [2021-11-23 17:39:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:03,380 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-11-23 17:39:03,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-11-23 17:39:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:39:03,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:03,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:03,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:03,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-23 17:39:03,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:03,807 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 7 times [2021-11-23 17:39:03,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753189043] [2021-11-23 17:39:03,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:39:03,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:03,809 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:03,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:39:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:03,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:39:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:04,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:39:04,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:04,676 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:39:04,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:39:04,902 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:39:04,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:39:05,039 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:39:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:39:05,190 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 17:39:05,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:39:05,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:39:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:05,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:31,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:39:31,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-11-23 17:39:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:31,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:31,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753189043] [2021-11-23 17:39:31,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753189043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1731360197] [2021-11-23 17:39:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:39:31,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:31,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:31,670 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:31,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:39:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 17:39:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:33,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:39:34,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:34,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:34,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:39:35,408 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:39:35,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:39:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:35,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 17:39:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 17:39:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:39:36,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:39:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:39:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:36,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:16,766 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:40:16,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-11-23 17:40:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:16,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1731360197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:16,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945295075] [2021-11-23 17:40:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:40:16,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:16,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:16,780 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:16,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:40:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:16,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 17:40:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:40:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:40:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:40:17,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:40:18,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:40:18,525 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:40:18,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:40:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:18,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 17:40:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:18,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 17:40:18,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:18,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 17:40:19,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:40:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:22,047 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:40:22,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-11-23 17:40:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:22,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945295075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:22,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:40:22,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20, 22, 21, 22] total 73 [2021-11-23 17:40:22,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981726946] [2021-11-23 17:40:22,056 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:40:22,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 17:40:22,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 17:40:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=4588, Unknown=27, NotChecked=0, Total=5256 [2021-11-23 17:40:22,060 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 73 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:25,555 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_447 (_ BitVec 32)) (|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32)) (v_ArrVal_452 (_ BitVec 32)) (v_ArrVal_450 (_ BitVec 32))) (= c_~N~0 (select (let ((.cse0 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (bvadd (_ bv4 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_447) (bvadd (_ bv8 32) .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_450) (bvadd .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_452)) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (bvule c_~N~0 (_ bv536870911 32)))) (or (and .cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (not .cse1)))) (not (bvsle c_~N~0 (_ bv0 32))) (forall ((v_ArrVal_447 (_ BitVec 32)) (|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~a~0#1.base| (_ BitVec 32)) (v_ArrVal_452 (_ BitVec 32)) (v_ArrVal_450 (_ BitVec 32))) (= c_~N~0 (select (let ((.cse2 (bvmul |c_ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) (store (store (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (bvadd .cse2 |ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (bvadd (_ bv4 32) .cse2 |ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_447) (bvadd (_ bv8 32) .cse2 |ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_450) (bvadd .cse2 |ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32)) v_ArrVal_452)) |ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2021-11-23 17:41:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:06,219 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-11-23 17:41:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 17:41:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 0 states have call successors, (0), 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 28 [2021-11-23 17:41:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:06,222 INFO L225 Difference]: With dead ends: 119 [2021-11-23 17:41:06,222 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 17:41:06,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 79 SyntacticMatches, 13 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4870 ImplicationChecksByTransitivity, 118.0s TimeCoverageRelationStatistics Valid=1302, Invalid=10002, Unknown=42, NotChecked=210, Total=11556 [2021-11-23 17:41:06,228 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:06,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 312 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 479 Invalid, 0 Unknown, 366 Unchecked, 0.8s Time] [2021-11-23 17:41:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 17:41:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2021-11-23 17:41:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-23 17:41:06,247 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 28 [2021-11-23 17:41:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:06,247 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-23 17:41:06,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-23 17:41:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:41:06,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:06,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:06,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:06,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:06,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-23 17:41:06,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:06,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 2 times [2021-11-23 17:41:06,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:06,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901260585] [2021-11-23 17:41:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:06,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:06,867 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:06,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:41:07,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:07,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:41:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:07,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:41:07,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:41:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-23 17:41:07,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:41:07,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 17:41:07,271 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:41:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 17:41:07,377 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-23 17:41:07,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 17:41:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:41:08,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:36,672 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32)) (v_ArrVal_564 (_ BitVec 32))) (let ((.cse1 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_564))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (= .cse0 (select (store .cse1 (bvadd (_ bv8 32) |ULTIMATE.start_main_~a~0#1.offset|) .cse0) |ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2021-11-23 17:41:36,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 166 [2021-11-23 17:41:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 187 [2021-11-23 17:41:36,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:41:36,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:41:36,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2021-11-23 17:41:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2021-11-23 17:41:36,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:36,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901260585] [2021-11-23 17:41:36,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901260585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331383705] [2021-11-23 17:41:36,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:36,776 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:36,782 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:36,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 17:41:36,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:41:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617995165] [2021-11-23 17:41:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:36,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:36,964 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:36,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 1 [2021-11-23 17:41:36,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 17:41:37,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:37,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:41:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:37,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:41:37,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 17:41:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:41:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 17:41:39,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 26 [2021-11-23 17:41:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:41:39,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:41,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:41:41,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 62 [2021-11-23 17:41:41,175 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-23 17:41:41,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 186 [2021-11-23 17:41:41,291 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 17:41:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 1 [2021-11-23 17:41:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:41:43,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617995165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:43,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:41:43,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 13] total 49 [2021-11-23 17:41:43,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390355622] [2021-11-23 17:41:43,541 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:43,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 17:41:43,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 17:41:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2033, Unknown=12, NotChecked=92, Total=2352 [2021-11-23 17:41:43,543 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:01,297 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-23 17:42:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 17:42:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 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 32 [2021-11-23 17:42:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:01,299 INFO L225 Difference]: With dead ends: 98 [2021-11-23 17:42:01,299 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 17:42:01,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=560, Invalid=4831, Unknown=15, NotChecked=144, Total=5550 [2021-11-23 17:42:01,303 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:01,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 151 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 315 Invalid, 0 Unknown, 133 Unchecked, 0.7s Time] [2021-11-23 17:42:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 17:42:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2021-11-23 17:42:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 72 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-11-23 17:42:01,321 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 32 [2021-11-23 17:42:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:01,322 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-11-23 17:42:01,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-11-23 17:42:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:42:01,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:01,323 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:01,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:01,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:01,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:01,738 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1112184374, now seen corresponding path program 8 times [2021-11-23 17:42:01,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664118870] [2021-11-23 17:42:01,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:42:01,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:01,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:01,741 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:01,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:42:01,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:42:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:01,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 17:42:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:42:02,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:02,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:02,708 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:42:02,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:42:02,933 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:42:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:03,073 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:42:03,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:03,193 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:42:03,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:03,323 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 17:42:03,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:03,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:42:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:03,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:20,052 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:42:20,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-11-23 17:42:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:20,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664118870] [2021-11-23 17:42:20,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664118870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332916909] [2021-11-23 17:42:20,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:42:20,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:20,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:20,065 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:20,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 17:42:20,237 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:42:20,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077042522] [2021-11-23 17:42:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:42:20,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:42:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:42:20,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 1 [2021-11-23 17:42:20,246 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:42:20,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 17:42:20,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:42:20,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:20,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 17:42:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:20,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:42:20,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:20,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:21,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:21,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:42:22,519 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:42:22,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:42:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:22,905 INFO L354 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2021-11-23 17:42:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2021-11-23 17:42:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:23,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:23,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:23,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 17:42:24,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-23 17:42:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:24,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:58,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:42:58,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-11-23 17:42:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:58,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077042522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:58,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:42:58,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 27, 28] total 91 [2021-11-23 17:42:58,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658842879] [2021-11-23 17:42:58,399 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:42:58,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-23 17:42:58,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:58,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-23 17:42:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=7032, Unknown=19, NotChecked=0, Total=8190 [2021-11-23 17:42:58,401 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 91 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:56,483 WARN L227 SmtUtils]: Spent 33.32s on a formula simplification. DAG size of input: 86 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:44:39,140 WARN L227 SmtUtils]: Spent 14.45s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:44:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:49,600 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2021-11-23 17:44:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 17:44:49,601 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 0 states have call successors, (0), 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 32 [2021-11-23 17:44:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:49,601 INFO L225 Difference]: With dead ends: 125 [2021-11-23 17:44:49,602 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 17:44:49,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 5889 ImplicationChecksByTransitivity, 164.1s TimeCoverageRelationStatistics Valid=2025, Invalid=14448, Unknown=39, NotChecked=0, Total=16512 [2021-11-23 17:44:49,603 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 998 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:49,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 217 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 450 Invalid, 0 Unknown, 998 Unchecked, 0.6s Time] [2021-11-23 17:44:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 17:44:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2021-11-23 17:44:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.164835164835165) internal successors, (106), 91 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-11-23 17:44:49,620 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 32 [2021-11-23 17:44:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:49,620 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-11-23 17:44:49,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-11-23 17:44:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 17:44:49,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:49,621 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:49,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:49,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:50,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:50,022 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 351176898, now seen corresponding path program 3 times [2021-11-23 17:44:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579727639] [2021-11-23 17:44:50,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:50,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:50,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:50,024 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:50,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:44:50,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:44:50,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:50,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:44:50,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:44:50,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:52,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579727639] [2021-11-23 17:44:52,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579727639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [544061002] [2021-11-23 17:44:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:52,153 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:52,154 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:52,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 17:44:52,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:44:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:52,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:44:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:44:52,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:44:53,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [544061002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:53,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43368126] [2021-11-23 17:44:53,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:44:53,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:53,702 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:53,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 17:44:53,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:44:53,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:44:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:44:54,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:44:55,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43368126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:55,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:55,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 16, 14, 15, 15] total 60 [2021-11-23 17:44:55,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210988671] [2021-11-23 17:44:55,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:55,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 17:44:55,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 17:44:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=2829, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 17:44:55,781 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 60 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:02,670 INFO L93 Difference]: Finished difference Result 256 states and 283 transitions. [2021-11-23 17:45:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 17:45:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 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 34 [2021-11-23 17:45:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:02,672 INFO L225 Difference]: With dead ends: 256 [2021-11-23 17:45:02,672 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 17:45:02,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3205 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1769, Invalid=7737, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 17:45:02,674 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 814 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:02,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 491 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:45:02,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 17:45:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 118. [2021-11-23 17:45:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 117 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-11-23 17:45:02,697 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 34 [2021-11-23 17:45:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:02,697 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-11-23 17:45:02,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:45:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-11-23 17:45:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 17:45:02,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:02,698 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:02,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:02,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:03,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:03,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:03,299 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1226631488, now seen corresponding path program 4 times [2021-11-23 17:45:03,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:03,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792157798] [2021-11-23 17:45:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:45:03,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:03,301 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:03,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:45:03,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:45:03,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:45:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:03,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:45:03,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:45:03,589 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 17:45:03,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 17:45:03,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:45:03,694 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:45:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 17:45:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:45:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-23 17:45:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:45:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 17:45:03,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:03,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:45:03,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 17:45:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:45:04,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:45:28,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:28,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792157798] [2021-11-23 17:45:28,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792157798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:28,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [196692564] [2021-11-23 17:45:28,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:45:28,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:28,070 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:28,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 17:45:28,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:45:28,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:28,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:45:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:28,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:45:28,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:28,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:28,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:29,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:29,395 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-23 17:45:29,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:45:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:29,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-23 17:45:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-23 17:45:30,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-23 17:45:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:30,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-23 17:45:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:32,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-11-23 17:45:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:32,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:45:36,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [196692564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:36,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719340810] [2021-11-23 17:45:36,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:45:36,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:45:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:45:36,712 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:45:36,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_319c22a8-476e-4bcf-afed-e41654edf32a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 17:45:36,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:45:36,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:45:36,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 17:45:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:37,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 17:45:37,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:45:37,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:37,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:38,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 17:45:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:45:39,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-23 17:45:40,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:40,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-23 17:45:40,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:45:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 17:45:40,679 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 17:45:40,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 17:45:42,338 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:45:42,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 26 [2021-11-23 17:45:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates...