./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_07.i --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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_07.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:27:28,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:27:28,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:27:28,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:27:28,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:27:28,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:27:28,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:27:28,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:27:28,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:27:28,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:27:28,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:27:28,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:27:28,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:27:28,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:27:28,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:27:28,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:27:28,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:27:28,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:27:28,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:27:28,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:27:28,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:27:28,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:27:28,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:27:28,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:27:28,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:27:28,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:27:28,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:27:28,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:27:28,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:27:28,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:27:28,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:27:28,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:27:28,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:27:28,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:27:28,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:27:28,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:27:28,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:27:28,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:27:28,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:27:28,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:27:28,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:27:28,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:27:28,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:27:28,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:27:28,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:27:28,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:27:28,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:27:28,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:27:28,807 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:27:28,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:27:28,807 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:27:28,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:27:28,808 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:27:28,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:27:28,808 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:27:28,808 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:27:28,808 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:27:28,808 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:27:28,813 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:27:28,813 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:27:28,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:27:28,814 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:27:28,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:27:28,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:27:28,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:27:28,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:27:28,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:27:28,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:27:28,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:27:28,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:27:28,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:27:28,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:27:28,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:27:28,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:27:28,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:28,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:27:28,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:27:28,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:27:28,820 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:27:28,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:27:28,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:27:28,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:27:28,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:27:28,821 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee [2021-11-23 17:27:29,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:27:29,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:27:29,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:27:29,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:27:29,140 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:27:29,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_two_index_07.i [2021-11-23 17:27:29,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/5c285c57b/0853e0d87ae64356bea0aaf43a392a64/FLAGae8ad161e [2021-11-23 17:27:29,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:27:29,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/sv-benchmarks/c/array-examples/standard_two_index_07.i [2021-11-23 17:27:29,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/5c285c57b/0853e0d87ae64356bea0aaf43a392a64/FLAGae8ad161e [2021-11-23 17:27:30,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/5c285c57b/0853e0d87ae64356bea0aaf43a392a64 [2021-11-23 17:27:30,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:27:30,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:27:30,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:30,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:27:30,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:27:30,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d61cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30, skipping insertion in model container [2021-11-23 17:27:30,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:27:30,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:27:30,288 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2021-11-23 17:27:30,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:30,310 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:27:30,323 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2021-11-23 17:27:30,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:30,343 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:27:30,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30 WrapperNode [2021-11-23 17:27:30,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:30,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:30,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:27:30,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:27:30,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,378 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-11-23 17:27:30,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:30,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:27:30,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:27:30,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:27:30,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:27:30,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:27:30,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:27:30,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:27:30,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:30" (1/1) ... [2021-11-23 17:27:30,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:30,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:30,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:27:30,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:27:30,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:27:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:27:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:27:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:27:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:27:30,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:27:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:27:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:27:30,567 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:27:30,569 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:27:30,707 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:27:30,726 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 17:27:30,733 INFO L158 Benchmark]: Toolchain (without parser) took 670.47ms. Allocated memory is still 113.2MB. Free memory was 70.8MB in the beginning and 74.8MB in the end (delta: -4.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:27:30,734 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:27:30,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.89ms. Allocated memory is still 113.2MB. Free memory was 70.6MB in the beginning and 87.8MB in the end (delta: -17.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:27:30,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.14ms. Allocated memory is still 113.2MB. Free memory was 87.8MB in the beginning and 86.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:27:30,737 INFO L158 Benchmark]: Boogie Preprocessor took 23.58ms. Allocated memory is still 113.2MB. Free memory was 86.1MB in the beginning and 85.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:27:30,738 INFO L158 Benchmark]: RCFGBuilder took 324.19ms. Allocated memory is still 113.2MB. Free memory was 85.0MB in the beginning and 74.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:27:30,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.89ms. Allocated memory is still 113.2MB. Free memory was 70.6MB in the beginning and 87.8MB in the end (delta: -17.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.14ms. Allocated memory is still 113.2MB. Free memory was 87.8MB in the beginning and 86.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.58ms. Allocated memory is still 113.2MB. Free memory was 86.1MB in the beginning and 85.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 324.19ms. Allocated memory is still 113.2MB. Free memory was 85.0MB in the beginning and 74.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:27:30,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_07.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:27:33,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:27:33,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:27:33,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:27:33,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:27:33,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:27:33,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:27:33,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:27:33,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:27:33,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:27:33,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:27:33,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:27:33,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:27:33,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:27:33,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:27:33,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:27:33,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:27:33,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:27:33,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:27:33,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:27:33,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:27:33,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:27:33,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:27:33,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:27:33,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:27:33,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:27:33,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:27:33,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:27:33,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:27:33,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:27:33,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:27:33,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:27:33,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:27:33,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:27:33,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:27:33,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:27:33,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:27:33,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:27:33,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:27:33,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:27:33,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:27:33,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:27:33,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:27:33,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:27:33,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:27:33,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:27:33,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:27:33,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:27:33,487 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:27:33,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:27:33,487 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:27:33,487 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:27:33,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:27:33,489 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:27:33,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:27:33,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:27:33,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:27:33,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:27:33,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:27:33,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:27:33,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:27:33,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:27:33,492 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:27:33,492 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:27:33,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:27:33,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:27:33,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:27:33,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:27:33,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:27:33,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:27:33,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:27:33,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:33,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:27:33,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:27:33,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:27:33,495 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:27:33,496 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:33,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:27:33,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:27:33,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:27:33,497 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dab8665a28c2bbd1b423d2ce2720a6327cfb393a457dca88feb0fe7cdfd90ee [2021-11-23 17:27:33,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:27:33,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:27:33,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:27:33,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:27:33,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:27:33,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_two_index_07.i [2021-11-23 17:27:33,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/837ac3574/9d0df7fe5f7642f6a34dde88a2320c77/FLAG5ab62785e [2021-11-23 17:27:34,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:27:34,470 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/sv-benchmarks/c/array-examples/standard_two_index_07.i [2021-11-23 17:27:34,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/837ac3574/9d0df7fe5f7642f6a34dde88a2320c77/FLAG5ab62785e [2021-11-23 17:27:34,826 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/data/837ac3574/9d0df7fe5f7642f6a34dde88a2320c77 [2021-11-23 17:27:34,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:27:34,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:27:34,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:34,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:27:34,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:27:34,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:34" (1/1) ... [2021-11-23 17:27:34,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1e8aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:34, skipping insertion in model container [2021-11-23 17:27:34,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:34" (1/1) ... [2021-11-23 17:27:34,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:27:34,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:27:35,056 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2021-11-23 17:27:35,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:35,083 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:27:35,135 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_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/sv-benchmarks/c/array-examples/standard_two_index_07.i[814,827] [2021-11-23 17:27:35,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:35,175 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:27:35,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35 WrapperNode [2021-11-23 17:27:35,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:35,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:35,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:27:35,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:27:35,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,220 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-11-23 17:27:35,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:35,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:27:35,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:27:35,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:27:35,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:27:35,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:27:35,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:27:35,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:27:35,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (1/1) ... [2021-11-23 17:27:35,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:35,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:35,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:27:35,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:27:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:27:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:27:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:27:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:27:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:27:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:27:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:27:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:27:35,457 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:27:35,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:27:35,670 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:27:35,675 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:27:35,676 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:27:35,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:27:35 BoogieIcfgContainer [2021-11-23 17:27:35,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:27:35,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:27:35,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:27:35,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:27:35,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:27:34" (1/3) ... [2021-11-23 17:27:35,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1590a047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:27:35, skipping insertion in model container [2021-11-23 17:27:35,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:35" (2/3) ... [2021-11-23 17:27:35,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1590a047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:27:35, skipping insertion in model container [2021-11-23 17:27:35,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:27:35" (3/3) ... [2021-11-23 17:27:35,700 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_07.i [2021-11-23 17:27:35,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:27:35,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:27:35,754 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:27:35,762 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 17:27:35,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:27:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 17:27:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:27:35,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:35,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:35,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-11-23 17:27:35,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:35,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220958624] [2021-11-23 17:27:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:35,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:35,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:35,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:35,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:27:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:36,010 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 17:27:36,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:36,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220958624] [2021-11-23 17:27:36,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220958624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:36,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:36,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:36,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018573023] [2021-11-23 17:27:36,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:36,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:36,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:36,060 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:27:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:36,111 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-11-23 17:27:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:36,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-23 17:27:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:36,122 INFO L225 Difference]: With dead ends: 28 [2021-11-23 17:27:36,122 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:27:36,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:36,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:36,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:27:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:27:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 17:27:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 17:27:36,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-23 17:27:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:36,162 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 17:27:36,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:27:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 17:27:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:27:36,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:36,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:36,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:36,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:36,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2021-11-23 17:27:36,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:36,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32473428] [2021-11-23 17:27:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:36,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:36,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:36,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:27:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:36,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:36,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:36,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:36,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32473428] [2021-11-23 17:27:36,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32473428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:36,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719605441] [2021-11-23 17:27:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:36,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:36,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:36,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:27:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:36,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:36,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:36,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:36,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [719605441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436049303] [2021-11-23 17:27:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:36,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:36,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:36,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:27:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:36,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:36,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:36,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436049303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:36,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:27:36,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 6 [2021-11-23 17:27:36,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808907379] [2021-11-23 17:27:36,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:36,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:36,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:36,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:27:36,952 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 17:27:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:37,014 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-23 17:27:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-11-23 17:27:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:37,018 INFO L225 Difference]: With dead ends: 24 [2021-11-23 17:27:37,018 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 17:27:37,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:27:37,020 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:37,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:27:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 17:27:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-23 17:27:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 17:27:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 17:27:37,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 17:27:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:37,026 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 17:27:37,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 17:27:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 17:27:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:27:37,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:37,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:37,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:37,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:37,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 17:27:37,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:37,629 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-11-23 17:27:37,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736221890] [2021-11-23 17:27:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:37,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:37,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:27:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:37,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:37,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736221890] [2021-11-23 17:27:37,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736221890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [691362237] [2021-11-23 17:27:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:37,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:37,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:27:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:37,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:38,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [691362237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835075572] [2021-11-23 17:27:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:38,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:38,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:38,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:27:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:38,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:38,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:27:38,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835075572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:38,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:38,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:27:38,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400280815] [2021-11-23 17:27:38,149 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:38,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:27:38,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:27:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:27:38,151 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:38,259 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-23 17:27:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:27:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:27:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:38,261 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:27:38,261 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 17:27:38,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:38,263 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:38,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:27:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 17:27:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-11-23 17:27:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 17:27:38,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-23 17:27:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:38,270 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 17:27:38,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 17:27:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:27:38,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:38,271 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:38,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:38,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:38,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:38,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:38,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2021-11-23 17:27:38,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:38,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31679761] [2021-11-23 17:27:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:27:38,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:38,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:38,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:38,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:27:38,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:27:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:27:39,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:27:39,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31679761] [2021-11-23 17:27:39,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31679761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998375354] [2021-11-23 17:27:39,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:27:39,192 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:39,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:39,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:27:39,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:27:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:27:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:27:39,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:27:39,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998375354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102557643] [2021-11-23 17:27:39,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:27:39,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:39,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:39,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:39,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:27:39,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:27:39,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:27:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:27:39,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:27:39,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102557643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:39,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:39,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 16 [2021-11-23 17:27:39,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145430450] [2021-11-23 17:27:39,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:39,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:27:39,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:27:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:27:39,659 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 17:27:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:40,384 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-11-23 17:27:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:27:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 17:27:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:40,386 INFO L225 Difference]: With dead ends: 65 [2021-11-23 17:27:40,386 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 17:27:40,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:27:40,388 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:40,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 95 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:27:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 17:27:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2021-11-23 17:27:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 17:27:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-23 17:27:40,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2021-11-23 17:27:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:40,397 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-23 17:27:40,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 17:27:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-23 17:27:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:27:40,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:40,398 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:40,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:40,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:40,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:41,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:41,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1691862744, now seen corresponding path program 3 times [2021-11-23 17:27:41,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:41,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854215562] [2021-11-23 17:27:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:27:41,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:41,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:41,012 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:41,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:27:41,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:27:41,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:27:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:27:41,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854215562] [2021-11-23 17:27:41,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854215562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:41,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [455969238] [2021-11-23 17:27:41,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:27:41,469 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:41,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:41,473 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:27:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:27:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:27:41,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:27:42,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [455969238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:42,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378058240] [2021-11-23 17:27:42,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:27:42,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:42,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:42,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:42,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:27:42,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:27:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:27:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:27:42,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:27:42,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378058240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:42,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:42,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-23 17:27:42,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22302941] [2021-11-23 17:27:42,402 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:42,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:27:42,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:42,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:27:42,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:27:42,404 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 17:27:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:43,206 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-23 17:27:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:27:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 27 [2021-11-23 17:27:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:43,209 INFO L225 Difference]: With dead ends: 109 [2021-11-23 17:27:43,209 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 17:27:43,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:27:43,211 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 160 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:43,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 180 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:27:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 17:27:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 37. [2021-11-23 17:27:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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 17:27:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-23 17:27:43,220 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2021-11-23 17:27:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:43,225 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-23 17:27:43,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 17:27:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-23 17:27:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 17:27:43,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:43,227 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:43,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:43,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 17:27:43,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 17:27:43,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:43,854 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash -7056424, now seen corresponding path program 4 times [2021-11-23 17:27:43,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:43,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477041988] [2021-11-23 17:27:43,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:27:43,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:43,856 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:43,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:27:43,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:27:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:43,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:27:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:44,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:44,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477041988] [2021-11-23 17:27:44,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477041988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445309485] [2021-11-23 17:27:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:27:44,737 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:44,738 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:44,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:27:44,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:27:44,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:27:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:45,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445309485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211831872] [2021-11-23 17:27:45,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:27:45,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:45,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:45,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:45,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:27:45,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:27:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:45,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:27:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:45,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:45,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211831872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:45,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:45,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 28 [2021-11-23 17:27:45,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918800647] [2021-11-23 17:27:45,437 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 17:27:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 17:27:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-11-23 17:27:45,440 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:47,387 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2021-11-23 17:27:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:27:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-23 17:27:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:47,389 INFO L225 Difference]: With dead ends: 93 [2021-11-23 17:27:47,389 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 17:27:47,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 17:27:47,392 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:47,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 134 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:27:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 17:27:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-11-23 17:27:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 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 17:27:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-23 17:27:47,401 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 35 [2021-11-23 17:27:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:47,401 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-23 17:27:47,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-23 17:27:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 17:27:47,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:47,403 INFO L514 BasicCegarLoop]: trace histogram [26, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:47,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:47,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-23 17:27:47,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:48,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:48,014 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash 676257656, now seen corresponding path program 5 times [2021-11-23 17:27:48,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:48,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803523727] [2021-11-23 17:27:48,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:27:48,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:48,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:48,016 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:48,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:27:48,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-23 17:27:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:27:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:49,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:27:51,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:51,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803523727] [2021-11-23 17:27:51,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803523727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:51,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070945792] [2021-11-23 17:27:51,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:27:51,245 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:51,248 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:51,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd03b0c5-68fc-4785-87b3-a0d1b7fe21eb/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process