./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.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_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/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_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/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_9dd1273f-44bc-4265-944a-4ff0e0654d81/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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:50,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:50,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:50,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:50,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:51,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:51,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:51,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:51,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:51,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:51,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:51,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:51,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:51,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:51,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:51,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:51,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:51,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:51,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:51,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:51,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:51,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:51,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:51,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:51,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:51,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:51,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:51,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:51,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:51,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:51,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:51,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:51,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:51,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:51,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:51,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:51,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:51,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:51,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:51,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:51,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:51,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:15:51,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:51,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:51,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:51,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:51,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:51,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:51,120 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:51,120 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:51,120 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:51,121 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:15:51,122 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:51,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:51,122 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:15:51,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:15:51,123 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:51,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:15:51,123 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:15:51,123 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:15:51,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:51,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:51,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:15:51,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:51,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:51,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:51,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:51,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:51,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:51,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:51,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:51,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:51,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:51,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:51,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:51,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:51,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:51,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:51,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:15:51,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:15:51,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:51,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:51,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:51,129 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_9dd1273f-44bc-4265-944a-4ff0e0654d81/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2021-11-23 17:15:51,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:51,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:51,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:51,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:51,440 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:51,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-23 17:15:51,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/261644eda/c5c2ba2f464649779bee83ad5bd7b63a/FLAG34b2fe274 [2021-11-23 17:15:52,004 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:52,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-23 17:15:52,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/261644eda/c5c2ba2f464649779bee83ad5bd7b63a/FLAG34b2fe274 [2021-11-23 17:15:52,386 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/261644eda/c5c2ba2f464649779bee83ad5bd7b63a [2021-11-23 17:15:52,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:52,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:52,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:52,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:52,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:52,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67d4ab83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52, skipping insertion in model container [2021-11-23 17:15:52,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:52,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:52,606 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_9dd1273f-44bc-4265-944a-4ff0e0654d81/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-23 17:15:52,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:52,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:52,681 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_9dd1273f-44bc-4265-944a-4ff0e0654d81/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-23 17:15:52,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:52,723 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:52,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52 WrapperNode [2021-11-23 17:15:52,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:52,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:52,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:52,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:52,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,786 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2021-11-23 17:15:52,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:52,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:52,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:52,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:52,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:52,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:52,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:52,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:52,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:52,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:52,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:15:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:15:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:15:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:52,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:15:52,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:15:53,018 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:53,019 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:53,208 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:53,228 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 17:15:53,232 INFO L158 Benchmark]: Toolchain (without parser) took 841.17ms. Allocated memory is still 104.9MB. Free memory was 77.0MB in the beginning and 50.7MB in the end (delta: 26.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-23 17:15:53,233 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:15:53,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.18ms. Allocated memory is still 104.9MB. Free memory was 77.0MB in the beginning and 66.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:15:53,235 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.01ms. Allocated memory is still 104.9MB. Free memory was 66.3MB in the beginning and 64.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:15:53,236 INFO L158 Benchmark]: Boogie Preprocessor took 52.81ms. Allocated memory is still 104.9MB. Free memory was 64.5MB in the beginning and 63.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:15:53,237 INFO L158 Benchmark]: RCFGBuilder took 389.97ms. Allocated memory is still 104.9MB. Free memory was 63.1MB in the beginning and 50.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:15:53,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 83.9MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.18ms. Allocated memory is still 104.9MB. Free memory was 77.0MB in the beginning and 66.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.01ms. Allocated memory is still 104.9MB. Free memory was 66.3MB in the beginning and 64.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.81ms. Allocated memory is still 104.9MB. Free memory was 64.5MB in the beginning and 63.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 389.97ms. Allocated memory is still 104.9MB. Free memory was 63.1MB in the beginning and 50.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. 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 17:15:53,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/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_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/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_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/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_9dd1273f-44bc-4265-944a-4ff0e0654d81/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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:55,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:55,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:55,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:55,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:55,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:55,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:55,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:55,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:55,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:55,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:55,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:55,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:55,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:55,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:55,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:55,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:55,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:55,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:55,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:55,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:55,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:55,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:55,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:55,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:55,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:55,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:55,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:55,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:55,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:55,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:55,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:55,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:55,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:55,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:55,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:55,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:55,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:55,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:55,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:55,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:55,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:15:55,994 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:55,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:55,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:55,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:55,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:55,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:55,997 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:55,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:55,997 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:55,997 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:55,998 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:55,999 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:56,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:56,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:56,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:56,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:56,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:56,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:56,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:56,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:15:56,001 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:15:56,002 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:15:56,002 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:56,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:56,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:56,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:56,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:56,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:15:56,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:56,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:56,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:56,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:56,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:56,004 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:15:56,005 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:56,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:56,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:56,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:56,006 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_9dd1273f-44bc-4265-944a-4ff0e0654d81/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2021-11-23 17:15:56,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:56,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:56,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:56,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:56,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:56,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-23 17:15:56,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/d0ac81f03/9bc82b90828143f6b9c1abe4c582c88b/FLAG4ce31b9e8 [2021-11-23 17:15:57,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:57,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-23 17:15:57,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/d0ac81f03/9bc82b90828143f6b9c1abe4c582c88b/FLAG4ce31b9e8 [2021-11-23 17:15:57,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/data/d0ac81f03/9bc82b90828143f6b9c1abe4c582c88b [2021-11-23 17:15:57,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:57,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:57,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:57,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:57,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:57,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ab162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57, skipping insertion in model container [2021-11-23 17:15:57,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:57,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:57,682 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_9dd1273f-44bc-4265-944a-4ff0e0654d81/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-23 17:15:57,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:57,718 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:57,759 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_9dd1273f-44bc-4265-944a-4ff0e0654d81/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-23 17:15:57,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:57,840 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:57,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57 WrapperNode [2021-11-23 17:15:57,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:57,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:57,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:57,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:57,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,883 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 131 [2021-11-23 17:15:57,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:57,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:57,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:57,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:57,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:57,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:57,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:57,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:57,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:57,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:57,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:57,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:58,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:58,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:15:58,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:15:58,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:15:58,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:58,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:58,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:15:58,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:15:58,085 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:58,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:58,758 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:58,765 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:15:58,765 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-23 17:15:58,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:58 BoogieIcfgContainer [2021-11-23 17:15:58,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:15:58,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:15:58,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:15:58,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:15:58,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:15:57" (1/3) ... [2021-11-23 17:15:58,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3096229a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:58, skipping insertion in model container [2021-11-23 17:15:58,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (2/3) ... [2021-11-23 17:15:58,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3096229a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:58, skipping insertion in model container [2021-11-23 17:15:58,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:58" (3/3) ... [2021-11-23 17:15:58,778 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-11-23 17:15:58,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:15:58,804 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:15:58,869 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:15:58,880 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 17:15:58,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:15:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 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 17:15:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:15:58,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:58,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:58,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2021-11-23 17:15:58,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:58,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073036623] [2021-11-23 17:15:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:58,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:58,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:58,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:58,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:15:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:15:59,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:59,147 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 17:15:59,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:59,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073036623] [2021-11-23 17:15:59,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073036623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:59,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:59,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:15:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138293260] [2021-11-23 17:15:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:59,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:15:59,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:15:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:15:59,195 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 17:15:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:59,228 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2021-11-23 17:15:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:15:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2021-11-23 17:15:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:59,238 INFO L225 Difference]: With dead ends: 67 [2021-11-23 17:15:59,239 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 17:15:59,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:15:59,249 INFO L933 BasicCegarLoop]: 46 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, 46 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 17:15:59,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 17:15:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 17:15:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 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 17:15:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-11-23 17:15:59,294 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2021-11-23 17:15:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:59,295 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-11-23 17:15:59,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 17:15:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-11-23 17:15:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:15:59,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:59,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:59,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:59,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:59,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2021-11-23 17:15:59,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933136646] [2021-11-23 17:15:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:59,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:59,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:59,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:15:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:15:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:59,735 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 17:15:59,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:59,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933136646] [2021-11-23 17:15:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933136646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:59,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:59,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:15:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163351802] [2021-11-23 17:15:59,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:59,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:15:59,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:15:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:15:59,740 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 17:16:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:00,135 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2021-11-23 17:16:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-23 17:16:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:00,143 INFO L225 Difference]: With dead ends: 73 [2021-11-23 17:16:00,144 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 17:16:00,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:16:00,146 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:00,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 33 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:16:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 17:16:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-11-23 17:16:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2021-11-23 17:16:00,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2021-11-23 17:16:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:00,157 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2021-11-23 17:16:00,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 17:16:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2021-11-23 17:16:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:16:00,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:00,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:00,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:00,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:00,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -785961326, now seen corresponding path program 1 times [2021-11-23 17:16:00,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:00,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107126555] [2021-11-23 17:16:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:00,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:00,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:00,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:16:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:00,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:00,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:00,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107126555] [2021-11-23 17:16:00,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107126555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:00,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:00,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:00,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025299428] [2021-11-23 17:16:00,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:00,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:00,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:16:00,579 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:00,956 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2021-11-23 17:16:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:00,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 17:16:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:00,958 INFO L225 Difference]: With dead ends: 78 [2021-11-23 17:16:00,958 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 17:16:00,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:16:00,960 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:00,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:16:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 17:16:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-11-23 17:16:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:00,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-11-23 17:16:00,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2021-11-23 17:16:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:00,982 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-11-23 17:16:00,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-11-23 17:16:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 17:16:00,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:00,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:00,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:01,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:01,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1148207861, now seen corresponding path program 1 times [2021-11-23 17:16:01,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:01,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056167184] [2021-11-23 17:16:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:01,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:01,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:01,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:16:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:01,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:01,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:01,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056167184] [2021-11-23 17:16:01,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056167184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:01,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:16:01,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:16:01,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587133656] [2021-11-23 17:16:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:01,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:01,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:16:01,392 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 17:16:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:01,705 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2021-11-23 17:16:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) Word has length 21 [2021-11-23 17:16:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:01,706 INFO L225 Difference]: With dead ends: 80 [2021-11-23 17:16:01,707 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 17:16:01,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:16:01,708 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:01,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 38 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 17:16:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-11-23 17:16:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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 17:16:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-11-23 17:16:01,719 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 21 [2021-11-23 17:16:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:01,719 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-11-23 17:16:01,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 17:16:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-11-23 17:16:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:16:01,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:01,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:01,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:01,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:01,934 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:01,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1730545667, now seen corresponding path program 1 times [2021-11-23 17:16:01,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561775453] [2021-11-23 17:16:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:01,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:01,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:01,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:16:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:02,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:02,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:02,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561775453] [2021-11-23 17:16:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561775453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425297290] [2021-11-23 17:16:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:02,237 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:02,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:02,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:16:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:02,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425297290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:02,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304827815] [2021-11-23 17:16:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:02,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:02,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:02,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:02,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:16:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:02,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:02,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304827815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:02,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:16:02,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:16:02,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226211632] [2021-11-23 17:16:02,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:02,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:02,810 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 17:16:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:03,174 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2021-11-23 17:16:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 17:16:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:03,175 INFO L225 Difference]: With dead ends: 53 [2021-11-23 17:16:03,175 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 17:16:03,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:03,177 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:03,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 17:16:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-11-23 17:16:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-23 17:16:03,186 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 22 [2021-11-23 17:16:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:03,187 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-23 17:16:03,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 17:16:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-23 17:16:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 17:16:03,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:03,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:03,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:03,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:03,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:03,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:03,814 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1317376654, now seen corresponding path program 1 times [2021-11-23 17:16:03,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:03,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952046896] [2021-11-23 17:16:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:03,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:03,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:03,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:03,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:16:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:03,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:04,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952046896] [2021-11-23 17:16:04,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952046896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081311891] [2021-11-23 17:16:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:04,103 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:04,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:04,106 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:04,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:16:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:04,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:04,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:16:04,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081311891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:04,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947358506] [2021-11-23 17:16:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:04,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:04,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:04,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:16:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:04,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:04,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:04,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947358506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:04,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:16:04,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:16:04,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469245830] [2021-11-23 17:16:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:04,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:04,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:04,662 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 17:16:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:05,004 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-11-23 17:16:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:05,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 25 [2021-11-23 17:16:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:05,006 INFO L225 Difference]: With dead ends: 57 [2021-11-23 17:16:05,006 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 17:16:05,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:05,008 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:05,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 17:16:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-23 17:16:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-11-23 17:16:05,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 25 [2021-11-23 17:16:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:05,018 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-11-23 17:16:05,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 17:16:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-11-23 17:16:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:16:05,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:05,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:05,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:05,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:05,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:05,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:05,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1299906559, now seen corresponding path program 1 times [2021-11-23 17:16:05,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:05,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127199674] [2021-11-23 17:16:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:05,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:05,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:05,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:16:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:05,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:05,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127199674] [2021-11-23 17:16:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127199674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143486987] [2021-11-23 17:16:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:05,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:05,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:05,929 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:05,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:16:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:06,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:06,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:16:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143486987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:06,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841600355] [2021-11-23 17:16:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:06,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:06,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:06,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:06,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:16:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:06,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:06,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841600355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:06,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:16:06,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:16:06,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406444504] [2021-11-23 17:16:06,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:06,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:06,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:06,532 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:06,822 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-11-23 17:16:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:16:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:06,824 INFO L225 Difference]: With dead ends: 57 [2021-11-23 17:16:06,824 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 17:16:06,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:06,825 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:06,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 17:16:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 17:16:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-11-23 17:16:06,840 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 28 [2021-11-23 17:16:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:06,841 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-11-23 17:16:06,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-11-23 17:16:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 17:16:06,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:06,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:06,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:07,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:07,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 17:16:07,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:07,457 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:07,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:07,457 INFO L85 PathProgramCache]: Analyzing trace with hash 794192639, now seen corresponding path program 1 times [2021-11-23 17:16:07,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:07,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649532008] [2021-11-23 17:16:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:07,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:07,459 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:07,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:16:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:07,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:07,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:07,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649532008] [2021-11-23 17:16:07,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649532008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085408895] [2021-11-23 17:16:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:07,748 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:07,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:07,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:07,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:16:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:07,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:07,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:16:08,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2085408895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315724398] [2021-11-23 17:16:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:08,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:08,062 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:08,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:16:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:08,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:08,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:08,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315724398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:08,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:16:08,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:16:08,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142200006] [2021-11-23 17:16:08,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:08,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:08,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:08,316 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 17:16:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:08,700 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-11-23 17:16:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) Word has length 29 [2021-11-23 17:16:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:08,708 INFO L225 Difference]: With dead ends: 82 [2021-11-23 17:16:08,708 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 17:16:08,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:08,710 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:08,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:16:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 17:16:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 40. [2021-11-23 17:16:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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 17:16:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-23 17:16:08,721 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 29 [2021-11-23 17:16:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:08,721 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-23 17:16:08,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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 17:16:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-23 17:16:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:16:08,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:08,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:08,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:08,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:09,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:09,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:09,326 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash 499845645, now seen corresponding path program 1 times [2021-11-23 17:16:09,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:09,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025380972] [2021-11-23 17:16:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:09,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:09,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:09,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:09,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:16:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:16:09,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:16:09,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:09,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025380972] [2021-11-23 17:16:09,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025380972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:09,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71789147] [2021-11-23 17:16:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:09,672 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:09,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:09,674 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:09,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:16:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:16:09,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:16:09,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71789147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:09,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102180771] [2021-11-23 17:16:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:09,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:09,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:09,986 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 17:16:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:10,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:10,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:10,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:10,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102180771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:10,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:16:10,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:16:10,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922486020] [2021-11-23 17:16:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:10,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:10,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:10,233 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 17:16:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:10,672 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2021-11-23 17:16:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 17:16:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:10,674 INFO L225 Difference]: With dead ends: 80 [2021-11-23 17:16:10,674 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 17:16:10,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:10,675 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:10,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 41 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:16:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 17:16:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-11-23 17:16:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 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 17:16:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-11-23 17:16:10,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 32 [2021-11-23 17:16:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:10,689 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-11-23 17:16:10,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 17:16:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-11-23 17:16:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 17:16:10,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:10,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:10,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:10,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 17:16:11,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 17:16:11,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:11,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 749230625, now seen corresponding path program 1 times [2021-11-23 17:16:11,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017434378] [2021-11-23 17:16:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:11,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:11,306 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:11,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:16:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:16:11,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:16:11,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017434378] [2021-11-23 17:16:11,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017434378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491653290] [2021-11-23 17:16:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:11,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:11,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:11,626 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:11,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 17:16:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:16:11,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:16:11,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491653290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:11,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868127372] [2021-11-23 17:16:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:11,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:11,948 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:11,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 17:16:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:12,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:16:12,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868127372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:16:12,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:16:12,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-23 17:16:12,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409182271] [2021-11-23 17:16:12,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:12,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:12,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:12,229 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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 17:16:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:12,537 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-11-23 17:16:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:16:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) Word has length 35 [2021-11-23 17:16:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:12,538 INFO L225 Difference]: With dead ends: 74 [2021-11-23 17:16:12,538 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 17:16:12,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:12,539 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:12,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 48 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:16:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 17:16:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-11-23 17:16:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 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 17:16:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-11-23 17:16:12,547 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 35 [2021-11-23 17:16:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-11-23 17:16:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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 17:16:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-11-23 17:16:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 17:16:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:12,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:12,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:12,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:12,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-23 17:16:13,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:13,149 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:13,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1063758460, now seen corresponding path program 1 times [2021-11-23 17:16:13,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:13,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293804313] [2021-11-23 17:16:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:13,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:13,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:13,151 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:13,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:16:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:13,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:13,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293804313] [2021-11-23 17:16:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293804313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203110387] [2021-11-23 17:16:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:13,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:13,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:13,461 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:13,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 17:16:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:13,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:13,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:16:13,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203110387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:13,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283106103] [2021-11-23 17:16:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:13,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:13,753 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:13,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 17:16:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:16:14,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:16:14,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283106103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:14,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:14,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-23 17:16:14,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142707422] [2021-11-23 17:16:14,264 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:14,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:16:14,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:14,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:16:14,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:16:14,266 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:16,988 INFO L93 Difference]: Finished difference Result 326 states and 440 transitions. [2021-11-23 17:16:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 17:16:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 17:16:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:16,992 INFO L225 Difference]: With dead ends: 326 [2021-11-23 17:16:16,992 INFO L226 Difference]: Without dead ends: 289 [2021-11-23 17:16:16,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:16:16,994 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 702 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:16,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 140 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 17:16:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-23 17:16:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 84. [2021-11-23 17:16:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 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 17:16:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2021-11-23 17:16:17,016 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 36 [2021-11-23 17:16:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:17,018 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2021-11-23 17:16:17,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2021-11-23 17:16:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:16:17,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:17,027 INFO L514 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:17,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:17,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-23 17:16:17,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-23 17:16:17,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:17,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2036854978, now seen corresponding path program 2 times [2021-11-23 17:16:17,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:17,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769416385] [2021-11-23 17:16:17,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:17,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:17,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:17,632 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:17,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:16:17,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:17,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:16:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 86 proven. 10 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 17:16:18,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 86 proven. 10 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 17:16:18,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:18,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769416385] [2021-11-23 17:16:18,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769416385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:18,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1010915366] [2021-11-23 17:16:18,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:18,344 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:18,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:18,344 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:18,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 17:16:18,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:16:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 86 proven. 10 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 17:16:18,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 86 proven. 10 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 17:16:19,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1010915366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855616980] [2021-11-23 17:16:19,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:19,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:19,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:19,082 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:19,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 17:16:19,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:19,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:16:19,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:16:19,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-23 17:16:20,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855616980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:20,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:20,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 5, 5] total 20 [2021-11-23 17:16:20,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507507959] [2021-11-23 17:16:20,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:20,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 17:16:20,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 17:16:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:16:20,317 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 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 17:16:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:25,085 INFO L93 Difference]: Finished difference Result 320 states and 424 transitions. [2021-11-23 17:16:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 17:16:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 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 69 [2021-11-23 17:16:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:25,088 INFO L225 Difference]: With dead ends: 320 [2021-11-23 17:16:25,088 INFO L226 Difference]: Without dead ends: 242 [2021-11-23 17:16:25,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 17:16:25,091 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 798 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:25,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 196 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 17:16:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-23 17:16:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 167. [2021-11-23 17:16:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 166 states have internal predecessors, (199), 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 17:16:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2021-11-23 17:16:25,130 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 69 [2021-11-23 17:16:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:25,131 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2021-11-23 17:16:25,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 states have internal predecessors, (111), 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 17:16:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2021-11-23 17:16:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 17:16:25,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:25,136 INFO L514 BasicCegarLoop]: trace histogram [40, 20, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:25,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:25,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:25,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-23 17:16:25,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:25,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash 636557028, now seen corresponding path program 3 times [2021-11-23 17:16:25,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884803229] [2021-11-23 17:16:25,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:25,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:25,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:25,762 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:25,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:16:25,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:16:25,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2021-11-23 17:16:26,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2021-11-23 17:16:26,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:26,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884803229] [2021-11-23 17:16:26,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884803229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:26,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [571246759] [2021-11-23 17:16:26,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:26,647 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:26,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:26,648 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:26,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 17:16:26,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:16:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2021-11-23 17:16:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2021-11-23 17:16:27,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [571246759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530206126] [2021-11-23 17:16:27,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:27,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:27,686 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:27,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 17:16:27,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:16:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:27,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2021-11-23 17:16:28,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2021-11-23 17:16:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530206126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:28,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:28,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 17:16:28,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652150675] [2021-11-23 17:16:28,537 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:28,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:16:28,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:16:28,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:16:28,539 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:29,442 INFO L93 Difference]: Finished difference Result 452 states and 559 transitions. [2021-11-23 17:16:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:16:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-23 17:16:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:29,452 INFO L225 Difference]: With dead ends: 452 [2021-11-23 17:16:29,452 INFO L226 Difference]: Without dead ends: 367 [2021-11-23 17:16:29,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:16:29,454 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 339 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:29,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 101 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:16:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-23 17:16:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 200. [2021-11-23 17:16:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1959798994974875) internal successors, (238), 199 states have internal predecessors, (238), 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 17:16:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 238 transitions. [2021-11-23 17:16:29,486 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 238 transitions. Word has length 134 [2021-11-23 17:16:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:29,486 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 238 transitions. [2021-11-23 17:16:29,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:16:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 238 transitions. [2021-11-23 17:16:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 17:16:29,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:29,489 INFO L514 BasicCegarLoop]: trace histogram [40, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:29,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:29,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-23 17:16:29,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:30,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:30,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2012988549, now seen corresponding path program 4 times [2021-11-23 17:16:30,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:30,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001814193] [2021-11-23 17:16:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:30,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:30,098 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:16:30,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:30,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:16:30,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 374 proven. 55 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2021-11-23 17:16:31,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 374 proven. 55 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2021-11-23 17:16:32,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:32,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001814193] [2021-11-23 17:16:32,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001814193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:32,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [420547893] [2021-11-23 17:16:32,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:32,141 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:32,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:32,142 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:32,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 17:16:32,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:32,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:16:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 374 proven. 55 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2021-11-23 17:16:33,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 374 proven. 55 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2021-11-23 17:16:33,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [420547893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633104417] [2021-11-23 17:16:33,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:16:33,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:33,639 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:33,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 17:16:34,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:16:34,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 382 proven. 1 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 17:16:34,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 382 proven. 1 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 17:16:35,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633104417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:35,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:35,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 5, 5] total 31 [2021-11-23 17:16:35,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238084604] [2021-11-23 17:16:35,222 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:35,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 17:16:35,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 17:16:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=704, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:16:35,224 INFO L87 Difference]: Start difference. First operand 200 states and 238 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 17:16:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:59,953 INFO L93 Difference]: Finished difference Result 2963 states and 4011 transitions. [2021-11-23 17:16:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-23 17:16:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 167 [2021-11-23 17:16:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:59,970 INFO L225 Difference]: With dead ends: 2963 [2021-11-23 17:16:59,971 INFO L226 Difference]: Without dead ends: 2769 [2021-11-23 17:16:59,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4567, Invalid=12725, Unknown=0, NotChecked=0, Total=17292 [2021-11-23 17:16:59,980 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 7658 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 4832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7658 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 7193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4832 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:59,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7658 Valid, 1270 Invalid, 7193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4832 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2021-11-23 17:16:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-11-23 17:17:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 791. [2021-11-23 17:17:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 1.1670886075949367) internal successors, (922), 790 states have internal predecessors, (922), 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 17:17:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 922 transitions. [2021-11-23 17:17:00,140 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 922 transitions. Word has length 167 [2021-11-23 17:17:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:00,141 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 922 transitions. [2021-11-23 17:17:00,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 17:17:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 922 transitions. [2021-11-23 17:17:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-11-23 17:17:00,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:00,153 INFO L514 BasicCegarLoop]: trace histogram [352, 20, 20, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:00,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:00,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-23 17:17:00,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-23 17:17:00,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:00,767 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1601699405, now seen corresponding path program 5 times [2021-11-23 17:17:00,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:00,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012424008] [2021-11-23 17:17:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:17:00,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:00,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:00,770 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:00,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:17:08,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-11-23 17:17:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:17:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 68506 backedges. 42534 proven. 3443 refuted. 0 times theorem prover too weak. 22529 trivial. 0 not checked. [2021-11-23 17:17:11,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 68506 backedges. 42534 proven. 3443 refuted. 0 times theorem prover too weak. 22529 trivial. 0 not checked. [2021-11-23 17:17:16,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:16,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012424008] [2021-11-23 17:17:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012424008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [829958837] [2021-11-23 17:17:16,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:17:16,834 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:16,843 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:16,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 17:17:21,671 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:17:21,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712383491] [2021-11-23 17:17:21,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:17:21,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:21,673 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 17:17:21,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd1273f-44bc-4265-944a-4ff0e0654d81/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 1