./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/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_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/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_a903ef0e-4141-4756-b65c-7c827ff40129/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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:22,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:22,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:22,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:22,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:22,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:22,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:22,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:22,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:22,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:22,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:22,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:22,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:22,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:22,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:22,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:22,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:22,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:22,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:22,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:22,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:22,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:22,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:22,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:22,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:22,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:22,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:22,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:22,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:22,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:22,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:22,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:22,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:22,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:22,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:22,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:22,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:22,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:22,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:22,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:22,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:22,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:35:22,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:22,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:22,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:22,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:22,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:22,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:22,469 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:22,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:22,470 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:22,470 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:35:22,470 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:22,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:22,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:35:22,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:35:22,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:22,472 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:35:22,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:35:22,473 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:35:22,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:22,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:22,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:35:22,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:22,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:22,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:35:22,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:22,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:35:22,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:22,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:35:22,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:22,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:35:22,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:22,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:22,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:22,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:22,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:22,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:35:22,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:35:22,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:35:22,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:35:22,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:22,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:22,482 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_a903ef0e-4141-4756-b65c-7c827ff40129/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2021-11-23 17:35:22,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:22,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:22,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:22,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:22,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:22,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2021-11-23 17:35:22,919 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/c354712f6/800a222ed08344b8847e7d614680e0f3/FLAG60fe7e101 [2021-11-23 17:35:23,485 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:23,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2021-11-23 17:35:23,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/c354712f6/800a222ed08344b8847e7d614680e0f3/FLAG60fe7e101 [2021-11-23 17:35:23,841 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/c354712f6/800a222ed08344b8847e7d614680e0f3 [2021-11-23 17:35:23,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:23,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:23,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:23,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:23,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:23,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:23" (1/1) ... [2021-11-23 17:35:23,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562bb46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:23, skipping insertion in model container [2021-11-23 17:35:23,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:23" (1/1) ... [2021-11-23 17:35:23,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:23,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:24,110 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_a903ef0e-4141-4756-b65c-7c827ff40129/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2021-11-23 17:35:24,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:24,155 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:24,179 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_a903ef0e-4141-4756-b65c-7c827ff40129/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2021-11-23 17:35:24,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:24,206 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:24,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24 WrapperNode [2021-11-23 17:35:24,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:24,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:24,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:24,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:24,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,245 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2021-11-23 17:35:24,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:24,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:24,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:24,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:24,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:24,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:24,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:24,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:24,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:24" (1/1) ... [2021-11-23 17:35:24,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:24,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:24,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:24,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:24,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:35:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:35:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:35:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:35:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:35:24,449 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:24,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:24,565 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:24,586 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:35:24,592 INFO L158 Benchmark]: Toolchain (without parser) took 745.09ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 56.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:24,593 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 92.3MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:24,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.24ms. Allocated memory is still 92.3MB. Free memory was 57.3MB in the beginning and 68.4MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:35:24,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.13ms. Allocated memory is still 92.3MB. Free memory was 68.4MB in the beginning and 66.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:24,595 INFO L158 Benchmark]: Boogie Preprocessor took 46.24ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 65.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:24,597 INFO L158 Benchmark]: RCFGBuilder took 295.63ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 56.3MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:35:24,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 92.3MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.24ms. Allocated memory is still 92.3MB. Free memory was 57.3MB in the beginning and 68.4MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.13ms. Allocated memory is still 92.3MB. Free memory was 68.4MB in the beginning and 66.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.24ms. Allocated memory is still 92.3MB. Free memory was 66.7MB in the beginning and 65.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 295.63ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 56.3MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:35:24,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/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_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/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_a903ef0e-4141-4756-b65c-7c827ff40129/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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:27,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:27,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:27,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:27,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:27,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:27,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:27,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:27,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:27,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:27,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:27,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:27,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:27,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:27,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:27,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:27,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:27,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:27,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:27,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:27,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:27,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:27,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:27,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:27,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:27,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:27,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:27,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:27,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:27,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:27,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:27,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:27,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:27,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:27,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:27,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:27,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:27,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:27,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:27,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:27,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:27,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:35:27,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:27,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:27,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:27,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:27,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:27,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:27,906 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:27,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:27,907 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:27,907 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:27,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:27,909 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:27,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:27,911 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:27,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:27,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:27,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:35:27,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:27,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:35:27,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:35:27,914 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:35:27,914 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:35:27,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:27,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:35:27,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:27,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:35:27,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:27,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:35:27,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:27,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:27,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:27,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:27,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:35:27,918 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:35:27,918 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:27,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:35:27,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:27,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:27,920 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_a903ef0e-4141-4756-b65c-7c827ff40129/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2021-11-23 17:35:28,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:28,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:28,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:28,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:28,465 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:28,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2021-11-23 17:35:28,581 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/3c207d7d2/495308d7d59746138dd88469523a9603/FLAG8a0a30560 [2021-11-23 17:35:29,260 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:29,262 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2021-11-23 17:35:29,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/3c207d7d2/495308d7d59746138dd88469523a9603/FLAG8a0a30560 [2021-11-23 17:35:29,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/data/3c207d7d2/495308d7d59746138dd88469523a9603 [2021-11-23 17:35:29,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:29,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:29,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:29,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:29,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:29,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:29,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c24e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29, skipping insertion in model container [2021-11-23 17:35:29,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:29,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:29,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:29,821 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_a903ef0e-4141-4756-b65c-7c827ff40129/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2021-11-23 17:35:29,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:29,875 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:29,904 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_a903ef0e-4141-4756-b65c-7c827ff40129/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2021-11-23 17:35:29,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:29,965 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:29,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29 WrapperNode [2021-11-23 17:35:29,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:29,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:29,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:29,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:29,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:29,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,019 INFO L137 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2021-11-23 17:35:30,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:30,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:30,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:30,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:30,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:30,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:30,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:30,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:30,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (1/1) ... [2021-11-23 17:35:30,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:30,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:30,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:30,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:30,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:35:30,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:35:30,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:35:30,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:30,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:35:30,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:35:30,261 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:30,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:30,427 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:30,435 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:35:30,435 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:35:30,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:35:30 BoogieIcfgContainer [2021-11-23 17:35:30,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:35:30,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:35:30,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:35:30,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:35:30,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:35:29" (1/3) ... [2021-11-23 17:35:30,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db30cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:35:30, skipping insertion in model container [2021-11-23 17:35:30,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:29" (2/3) ... [2021-11-23 17:35:30,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db30cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:35:30, skipping insertion in model container [2021-11-23 17:35:30,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:35:30" (3/3) ... [2021-11-23 17:35:30,447 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2021-11-23 17:35:30,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:35:30,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:35:30,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:35:30,524 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:35:30,524 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:35:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:35:30,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:30,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:30,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2021-11-23 17:35:30,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:30,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988874910] [2021-11-23 17:35:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:30,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:30,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:30,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:30,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:35:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:30,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:35:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:30,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:30,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988874910] [2021-11-23 17:35:30,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988874910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:30,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:30,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:35:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430061564] [2021-11-23 17:35:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:30,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:35:30,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:35:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:35:30,813 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:30,832 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-11-23 17:35:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:35:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-23 17:35:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:30,845 INFO L225 Difference]: With dead ends: 27 [2021-11-23 17:35:30,845 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:35:30,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:35:30,854 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:30,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:35:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:35:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 17:35:30,893 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 17:35:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 17:35:30,896 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2021-11-23 17:35:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 17:35:30,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 17:35:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:35:30,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:30,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:30,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:31,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:31,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2021-11-23 17:35:31,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:31,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674716944] [2021-11-23 17:35:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:31,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:31,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:35:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:35:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:31,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:31,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674716944] [2021-11-23 17:35:31,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674716944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:31,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:31,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:35:31,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526811255] [2021-11-23 17:35:31,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:31,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:35:31,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:35:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:35:31,367 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:31,447 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-23 17:35:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:35:31,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-23 17:35:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:31,451 INFO L225 Difference]: With dead ends: 29 [2021-11-23 17:35:31,452 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 17:35:31,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:35:31,455 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:31,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:35:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 17:35:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2021-11-23 17:35:31,462 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 17:35:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 17:35:31,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-11-23 17:35:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:31,466 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 17:35:31,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 17:35:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:35:31,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:31,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:31,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:35:31,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:31,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2021-11-23 17:35:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042347591] [2021-11-23 17:35:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:31,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:31,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:35:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:31,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:35:31,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:31,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:31,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:31,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042347591] [2021-11-23 17:35:31,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042347591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:31,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:31,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:35:31,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832419782] [2021-11-23 17:35:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:35:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:35:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:35:31,847 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:31,881 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-23 17:35:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:35:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 17:35:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:31,883 INFO L225 Difference]: With dead ends: 23 [2021-11-23 17:35:31,883 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 17:35:31,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:35:31,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:31,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:35:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 17:35:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-23 17:35:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-23 17:35:31,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-23 17:35:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:31,909 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-23 17:35:31,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-23 17:35:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:35:31,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:31,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:31,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:32,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:32,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2021-11-23 17:35:32,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:32,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951432829] [2021-11-23 17:35:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:32,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:32,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:32,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:35:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:35:32,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:32,326 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 17:35:32,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:32,436 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 17:35:32,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951432829] [2021-11-23 17:35:32,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951432829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1500124676] [2021-11-23 17:35:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:32,443 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:32,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:32,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:35:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:35:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:32,610 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 17:35:32,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:32,646 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 17:35:32,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1500124676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:32,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694766448] [2021-11-23 17:35:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:32,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:32,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:32,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:35:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:35:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:32,817 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 17:35:32,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:32,869 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 17:35:32,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694766448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:32,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:32,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-23 17:35:32,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449367843] [2021-11-23 17:35:32,870 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:32,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:35:32,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:35:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:35:32,873 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:33,045 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-23 17:35:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:35:33,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 17:35:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:33,048 INFO L225 Difference]: With dead ends: 50 [2021-11-23 17:35:33,048 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 17:35:33,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:35:33,050 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:33,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:35:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 17:35:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2021-11-23 17:35:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-23 17:35:33,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2021-11-23 17:35:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:33,059 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-23 17:35:33,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-23 17:35:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:35:33,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:33,060 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:33,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:33,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:33,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:33,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:33,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1715343990, now seen corresponding path program 1 times [2021-11-23 17:35:33,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:33,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611404939] [2021-11-23 17:35:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:33,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:33,666 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:33,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:35:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:35:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:33,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:33,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611404939] [2021-11-23 17:35:33,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611404939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [234469322] [2021-11-23 17:35:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:33,873 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:33,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:33,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:35:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:35:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:34,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:34,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [234469322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:34,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401862618] [2021-11-23 17:35:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:34,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:34,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:34,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:34,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:35:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:35:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:34,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:34,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401862618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:34,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 17:35:34,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636002136] [2021-11-23 17:35:34,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:34,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:35:34,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:35:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:35:34,224 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:34,368 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-23 17:35:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:35:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) Word has length 11 [2021-11-23 17:35:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:34,369 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:35:34,370 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 17:35:34,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:35:34,371 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:34,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:35:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 17:35:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-23 17:35:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-23 17:35:34,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 11 [2021-11-23 17:35:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:34,377 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-23 17:35:34,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-23 17:35:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 17:35:34,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:34,378 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:34,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:34,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:34,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:34,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:34,979 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:34,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2021-11-23 17:35:34,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541374980] [2021-11-23 17:35:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:34,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:34,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:34,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:34,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:35:35,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:35:35,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:35,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:35,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541374980] [2021-11-23 17:35:35,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541374980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452581045] [2021-11-23 17:35:35,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:35,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:35,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:35,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:35,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:35:35,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:35,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:35,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:35:35,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:36,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:36,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452581045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:36,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451124538] [2021-11-23 17:35:36,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:36,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:36,471 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:36,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:35:36,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:35:36,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:36,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:36,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451124538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:36,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:36,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 7, 7, 7] total 21 [2021-11-23 17:35:36,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037174153] [2021-11-23 17:35:36,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:36,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 17:35:36,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:36,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 17:35:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:35:36,780 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:37,351 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-23 17:35:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:35:37,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 17:35:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:37,357 INFO L225 Difference]: With dead ends: 84 [2021-11-23 17:35:37,357 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 17:35:37,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:35:37,359 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 344 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:37,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 104 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:35:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 17:35:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 40. [2021-11-23 17:35:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-23 17:35:37,380 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 19 [2021-11-23 17:35:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:37,380 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-23 17:35:37,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-23 17:35:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 17:35:37,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:37,382 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:37,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:37,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:37,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:37,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:37,989 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1855888886, now seen corresponding path program 2 times [2021-11-23 17:35:37,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:37,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075424696] [2021-11-23 17:35:37,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:37,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:37,992 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:38,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:35:38,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:35:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:38,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:35:38,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:35:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:38,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:35:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:35:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:39,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:39,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075424696] [2021-11-23 17:35:39,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075424696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:39,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2075713626] [2021-11-23 17:35:39,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:39,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:39,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:39,944 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:39,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:35:40,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:40,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:35:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:40,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:35:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:35:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:40,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:40,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:35:40,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:35:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2075713626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:40,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014848261] [2021-11-23 17:35:40,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:35:40,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:40,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:40,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:35:40,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:35:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:35:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:41,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 17:35:42,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:35:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:42,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:42,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:35:42,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:35:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:45,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014848261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:45,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:45,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13, 14, 15, 16] total 51 [2021-11-23 17:35:45,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7727104] [2021-11-23 17:35:45,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:45,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 17:35:45,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 17:35:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 17:35:45,485 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 51 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:49,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:51,856 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-23 17:35:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 17:35:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 51 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 17:35:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:51,862 INFO L225 Difference]: With dead ends: 79 [2021-11-23 17:35:51,862 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 17:35:51,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=555, Invalid=3735, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 17:35:51,866 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 180 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:51,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 319 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 578 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 17:35:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 17:35:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2021-11-23 17:35:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-23 17:35:51,881 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 23 [2021-11-23 17:35:51,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:51,881 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-23 17:35:51,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 51 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-23 17:35:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 17:35:51,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:51,883 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:51,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:52,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:52,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-23 17:35:52,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:52,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2016089162, now seen corresponding path program 3 times [2021-11-23 17:35:52,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:52,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003397139] [2021-11-23 17:35:52,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:35:52,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:52,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:52,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:35:52,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:35:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:52,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:35:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:52,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 17:35:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:35:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:35:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:35:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:53,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:53,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-23 17:35:53,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1672 treesize of output 1640 [2021-11-23 17:35:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:56,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003397139] [2021-11-23 17:35:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003397139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1043370582] [2021-11-23 17:35:56,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:35:56,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:56,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:56,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:35:56,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:35:56,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:35:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:57,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 17:35:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:57,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:35:57,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:35:57,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:35:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:57,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:57,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-23 17:35:57,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1672 treesize of output 1640 [2021-11-23 17:35:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:58,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1043370582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:58,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566981431] [2021-11-23 17:35:58,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:35:58,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:58,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:58,874 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:58,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:35:59,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:35:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:35:59,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:59,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 17:35:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:59,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:35:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:59,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:35:59,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:35:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:59,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:59,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-23 17:35:59,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1672 treesize of output 1640 [2021-11-23 17:36:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566981431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:01,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:01,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16, 18, 16, 18] total 32 [2021-11-23 17:36:01,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034075088] [2021-11-23 17:36:01,294 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:01,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:36:01,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:36:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:36:01,296 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:02,846 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-11-23 17:36:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:36:02,847 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 17:36:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:02,848 INFO L225 Difference]: With dead ends: 66 [2021-11-23 17:36:02,848 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 17:36:02,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=232, Invalid=1574, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 17:36:02,850 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:02,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 189 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 468 Invalid, 0 Unknown, 44 Unchecked, 0.6s Time] [2021-11-23 17:36:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 17:36:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-11-23 17:36:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-23 17:36:02,861 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 29 [2021-11-23 17:36:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:02,862 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-23 17:36:02,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-23 17:36:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:36:02,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:02,863 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:02,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:03,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-23 17:36:03,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:03,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:03,465 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash 13772134, now seen corresponding path program 1 times [2021-11-23 17:36:03,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:03,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682209857] [2021-11-23 17:36:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:03,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:03,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:03,467 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:03,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:36:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:36:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:03,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:36:04,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:36:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:04,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:36:04,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:36:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:05,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682209857] [2021-11-23 17:36:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682209857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042231598] [2021-11-23 17:36:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:05,823 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:05,824 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:05,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:36:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:36:05,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:36:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:36:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:06,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:36:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:36:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:06,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042231598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:06,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669854980] [2021-11-23 17:36:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:06,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:06,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:06,468 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:06,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:36:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:06,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:36:06,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:06,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:36:07,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:36:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:07,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:07,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:36:07,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:36:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:07,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669854980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:07,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:07,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16, 17, 17, 18] total 33 [2021-11-23 17:36:07,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866687602] [2021-11-23 17:36:07,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:07,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 17:36:07,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 17:36:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:36:07,498 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:08,909 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-23 17:36:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:36:08,910 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 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 30 [2021-11-23 17:36:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:08,911 INFO L225 Difference]: With dead ends: 75 [2021-11-23 17:36:08,911 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 17:36:08,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:36:08,913 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:08,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 247 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:36:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 17:36:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2021-11-23 17:36:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-23 17:36:08,924 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2021-11-23 17:36:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:08,924 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-23 17:36:08,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-23 17:36:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 17:36:08,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:08,926 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:08,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:09,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:09,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:09,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:09,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 2 times [2021-11-23 17:36:09,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:09,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348230031] [2021-11-23 17:36:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:09,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:09,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:09,538 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:09,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:36:09,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:09,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:36:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:36:09,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:36:10,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348230031] [2021-11-23 17:36:10,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348230031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1055530616] [2021-11-23 17:36:10,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:10,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:10,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:10,127 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:10,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:36:10,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:36:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:36:10,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:36:10,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1055530616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:10,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611405531] [2021-11-23 17:36:10,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:36:10,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:10,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:10,463 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:10,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 17:36:10,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:36:10,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:10,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:36:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:10,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:11,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611405531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:11,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:11,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 12, 13] total 35 [2021-11-23 17:36:11,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409242699] [2021-11-23 17:36:11,579 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:11,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 17:36:11,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 17:36:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:36:11,581 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:12,656 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-11-23 17:36:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:36:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 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 31 [2021-11-23 17:36:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:12,658 INFO L225 Difference]: With dead ends: 73 [2021-11-23 17:36:12,658 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 17:36:12,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 17:36:12,660 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:12,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 163 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:36:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 17:36:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-11-23 17:36:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-23 17:36:12,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2021-11-23 17:36:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:12,668 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-23 17:36:12,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-23 17:36:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 17:36:12,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:12,670 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:12,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:12,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:13,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:13,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:13,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2142378644, now seen corresponding path program 3 times [2021-11-23 17:36:13,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:13,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901323658] [2021-11-23 17:36:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:36:13,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:13,293 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:13,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:36:13,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:36:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:13,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:36:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:36:13,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:13,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 17:36:13,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:13,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:13,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:36:13,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-11-23 17:36:14,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:36:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2021-11-23 17:36:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:14,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2021-11-23 17:36:15,633 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 17:36:15,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 862 treesize of output 846 [2021-11-23 17:36:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:20,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901323658] [2021-11-23 17:36:20,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901323658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1758976225] [2021-11-23 17:36:20,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:36:20,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:20,235 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:20,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:36:20,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:36:20,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:20,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:36:20,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:20,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:36:20,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:20,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:36:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:36:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:21,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:22,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 17:36:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2021-11-23 17:36:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:23,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1758976225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:23,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780813619] [2021-11-23 17:36:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:36:23,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:23,903 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:23,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 17:36:24,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 17:36:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:36:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:24,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:36:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:24,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:36:24,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:36:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:24,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 17:36:24,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2021-11-23 17:36:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:25,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780813619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:25,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:25,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 18, 19, 19, 20] total 60 [2021-11-23 17:36:25,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180466744] [2021-11-23 17:36:25,184 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:25,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 17:36:25,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 17:36:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 17:36:25,188 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 60 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:27,692 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-23 17:36:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 17:36:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 60 states have internal predecessors, (110), 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 33 [2021-11-23 17:36:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:27,694 INFO L225 Difference]: With dead ends: 69 [2021-11-23 17:36:27,694 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 17:36:27,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 17:36:27,697 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:27,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 295 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 711 Invalid, 0 Unknown, 124 Unchecked, 1.3s Time] [2021-11-23 17:36:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 17:36:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-11-23 17:36:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-23 17:36:27,707 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 33 [2021-11-23 17:36:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:27,708 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-23 17:36:27,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-23 17:36:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 17:36:27,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:27,710 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:27,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:27,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:28,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:28,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:28,313 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1292495222, now seen corresponding path program 4 times [2021-11-23 17:36:28,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034090238] [2021-11-23 17:36:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:36:28,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:28,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:28,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:36:28,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:36:28,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:36:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:36:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:36:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:28,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:36:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:28,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:36:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:28,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:36:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:36:29,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:36:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:36:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:30,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-11-23 17:36:30,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13800 treesize of output 13736 [2021-11-23 17:37:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:38,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034090238] [2021-11-23 17:37:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034090238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974392889] [2021-11-23 17:37:38,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:37:38,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:38,509 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:38,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:37:38,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:37:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:37:38,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:37:38,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:38,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:37:38,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:38,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:37:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:37:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:38,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:37:38,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:37:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:38,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:39,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-11-23 17:37:39,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3446 treesize of output 3430 [2021-11-23 17:37:40,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 17:37:40,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56268755] [2021-11-23 17:37:40,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:37:40,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:40,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:40,314 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:40,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 17:37:40,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:37:40,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:37:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:40,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:37:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:40,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:37:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:40,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:37:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:40,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:37:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:40,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:37:40,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:37:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:40,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:41,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-11-23 17:37:41,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13608 treesize of output 13544 [2021-11-23 17:38:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:10,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56268755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:10,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:38:10,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 18, 22] total 38 [2021-11-23 17:38:10,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999840972] [2021-11-23 17:38:10,436 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:10,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 17:38:10,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 17:38:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 17:38:10,438 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:12,948 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2021-11-23 17:38:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 17:38:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 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 17:38:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:12,951 INFO L225 Difference]: With dead ends: 99 [2021-11-23 17:38:12,951 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 17:38:12,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=454, Invalid=2852, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 17:38:12,953 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:12,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 223 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 572 Invalid, 0 Unknown, 112 Unchecked, 0.7s Time] [2021-11-23 17:38:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 17:38:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2021-11-23 17:38:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-23 17:38:12,964 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 35 [2021-11-23 17:38:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:12,965 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-23 17:38:12,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 38 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-23 17:38:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:38:12,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:12,967 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:12,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:13,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:13,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:13,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:13,581 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1000805410, now seen corresponding path program 4 times [2021-11-23 17:38:13,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:13,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462424995] [2021-11-23 17:38:13,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:38:13,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:13,583 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:13,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:38:13,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:38:13,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:38:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:13,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:38:14,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:38:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:14,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:14,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:38:14,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:38:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:16,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:16,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462424995] [2021-11-23 17:38:16,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462424995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:16,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1535517520] [2021-11-23 17:38:16,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:38:16,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:16,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:16,466 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:16,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 17:38:16,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:38:16,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:38:16,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:16,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:38:16,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:38:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:16,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:38:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:38:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:17,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1535517520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249860539] [2021-11-23 17:38:17,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:38:17,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:17,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:17,183 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:17,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 17:38:17,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:38:17,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:38:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:18,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 17:38:18,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:38:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:18,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:19,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 17:38:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 17:38:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:25,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249860539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:25,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:25,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19, 20, 23, 24] total 73 [2021-11-23 17:38:25,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001965318] [2021-11-23 17:38:25,133 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:25,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 17:38:25,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 17:38:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=4816, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 17:38:25,137 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 73 states, 73 states have (on average 1.7397260273972603) internal successors, (127), 73 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:37,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:38:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:37,578 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2021-11-23 17:38:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 17:38:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.7397260273972603) internal successors, (127), 73 states have internal predecessors, (127), 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 37 [2021-11-23 17:38:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:37,580 INFO L225 Difference]: With dead ends: 120 [2021-11-23 17:38:37,581 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 17:38:37,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1047, Invalid=10725, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 17:38:37,586 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 289 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 168 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:37,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 581 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1252 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 17:38:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 17:38:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2021-11-23 17:38:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.175) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-23 17:38:37,604 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 37 [2021-11-23 17:38:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:37,605 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-23 17:38:37,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.7397260273972603) internal successors, (127), 73 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-23 17:38:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 17:38:37,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:37,607 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:37,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:37,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-23 17:38:38,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:38,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:38,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1811842161, now seen corresponding path program 3 times [2021-11-23 17:38:38,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:38,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922841761] [2021-11-23 17:38:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:38:38,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:38,233 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:38,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:38:38,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:38:38,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:38,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:38:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:38,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:39,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:39,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922841761] [2021-11-23 17:38:39,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922841761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:39,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205768532] [2021-11-23 17:38:39,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:38:39,637 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:39,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:39,639 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:39,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 17:38:39,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:38:39,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:38:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:40,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205768532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:41,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074481928] [2021-11-23 17:38:41,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:38:41,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:41,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:41,734 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:41,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 17:38:42,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:38:42,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:38:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:42,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:45,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074481928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:45,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:45,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 14, 13, 16] total 50 [2021-11-23 17:38:45,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360022173] [2021-11-23 17:38:45,298 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:45,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 17:38:45,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 17:38:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=2022, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 17:38:45,300 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:48,647 INFO L93 Difference]: Finished difference Result 228 states and 258 transitions. [2021-11-23 17:38:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:38:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 17:38:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:48,652 INFO L225 Difference]: With dead ends: 228 [2021-11-23 17:38:48,652 INFO L226 Difference]: Without dead ends: 221 [2021-11-23 17:38:48,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 17:38:48,654 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2484 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:48,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2484 Valid, 464 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:38:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-23 17:38:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 107. [2021-11-23 17:38:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.179245283018868) internal successors, (125), 106 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-11-23 17:38:48,675 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 37 [2021-11-23 17:38:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:48,676 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-11-23 17:38:48,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-11-23 17:38:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 17:38:48,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:48,678 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:48,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:48,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:49,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-23 17:38:49,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:49,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2092039380, now seen corresponding path program 5 times [2021-11-23 17:38:49,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549584553] [2021-11-23 17:38:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:38:49,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:49,293 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:49,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:38:49,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 17:38:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:38:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:49,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:38:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:49,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:38:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:49,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:38:50,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:50,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:38:50,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:38:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:50,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:51,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-23 17:38:51,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1704 treesize of output 1688 [2021-11-23 17:38:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:54,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549584553] [2021-11-23 17:38:54,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549584553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:54,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1136274659] [2021-11-23 17:38:54,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:38:54,042 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:54,043 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:54,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a903ef0e-4141-4756-b65c-7c827ff40129/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 17:38:54,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 17:38:54,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 17:38:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:54,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:38:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:38:54,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:54,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-23 17:38:54,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:38:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:38:55,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-23 17:38:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:55,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:56,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-23 17:38:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53736 treesize of output 53224