./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem05_label05.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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem05_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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 8c719552bffa6ba6db840a4f702be318375a6b230876dbc0ec27371d8d8c7a55 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:03:26,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:03:26,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:03:26,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:03:26,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:03:26,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:03:26,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:03:26,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:03:26,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:03:26,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:03:26,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:03:26,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:03:26,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:03:26,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:03:26,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:03:26,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:03:26,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:03:26,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:03:26,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:03:26,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:03:26,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:03:26,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:03:26,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:03:26,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:03:26,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:03:26,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:03:26,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:03:26,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:03:26,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:03:26,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:03:26,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:03:26,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:03:26,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:03:26,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:03:26,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:03:26,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:03:26,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:03:26,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:03:26,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:03:26,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:03:26,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:03:26,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:03:26,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:03:26,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:03:26,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:03:26,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:03:26,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:03:26,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:03:26,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:03:26,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:03:26,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:03:26,627 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:03:26,628 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:03:26,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:03:26,628 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:03:26,628 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:03:26,629 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:03:26,629 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:03:26,629 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:03:26,629 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:03:26,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:03:26,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:03:26,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:03:26,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:03:26,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:03:26,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:03:26,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:03:26,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:03:26,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:03:26,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:03:26,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:03:26,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:03:26,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:03:26,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:03:26,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:26,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:03:26,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:03:26,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:03:26,634 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:03:26,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:03:26,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:03:26,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:03:26,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:03:26,635 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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c719552bffa6ba6db840a4f702be318375a6b230876dbc0ec27371d8d8c7a55 [2021-11-23 17:03:26,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:03:26,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:03:26,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:03:26,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:03:26,947 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:03:26,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem05_label05.c [2021-11-23 17:03:27,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/b4f4f9bf3/0addc883d79e4031bc45f9d267df27d7/FLAG707dd0120 [2021-11-23 17:03:28,063 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:03:28,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/sv-benchmarks/c/eca-rers2012/Problem05_label05.c [2021-11-23 17:03:28,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/b4f4f9bf3/0addc883d79e4031bc45f9d267df27d7/FLAG707dd0120 [2021-11-23 17:03:28,420 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/b4f4f9bf3/0addc883d79e4031bc45f9d267df27d7 [2021-11-23 17:03:28,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:03:28,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:03:28,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:28,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:03:28,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:03:28,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:28" (1/1) ... [2021-11-23 17:03:28,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a07b05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:28, skipping insertion in model container [2021-11-23 17:03:28,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:28" (1/1) ... [2021-11-23 17:03:28,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:03:28,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:03:31,167 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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/sv-benchmarks/c/eca-rers2012/Problem05_label05.c[381607,381620] [2021-11-23 17:03:31,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:31,202 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:03:32,489 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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/sv-benchmarks/c/eca-rers2012/Problem05_label05.c[381607,381620] [2021-11-23 17:03:32,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:32,559 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:03:32,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32 WrapperNode [2021-11-23 17:03:32,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:32,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:32,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:03:32,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:03:32,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:32,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,241 INFO L137 Inliner]: procedures = 21, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 12346 [2021-11-23 17:03:33,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:33,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:03:33,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:03:33,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:03:33,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:03:33,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:03:33,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:03:33,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:03:33,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:32" (1/1) ... [2021-11-23 17:03:33,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:33,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:03:33,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:03:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:03:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:03:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:03:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:03:33,927 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:03:33,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:03:41,224 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:03:41,326 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 17:03:41,333 INFO L158 Benchmark]: Toolchain (without parser) took 12904.07ms. Allocated memory was 104.9MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 67.9MB in the beginning and 746.9MB in the end (delta: -679.0MB). Peak memory consumption was 359.2MB. Max. memory is 16.1GB. [2021-11-23 17:03:41,335 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 79.3MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:03:41,336 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4129.70ms. Allocated memory was 104.9MB in the beginning and 199.2MB in the end (delta: 94.4MB). Free memory was 67.9MB in the beginning and 77.0MB in the end (delta: -9.0MB). Peak memory consumption was 100.7MB. Max. memory is 16.1GB. [2021-11-23 17:03:41,338 INFO L158 Benchmark]: Boogie Procedure Inliner took 680.74ms. Allocated memory was 199.2MB in the beginning and 346.0MB in the end (delta: 146.8MB). Free memory was 77.0MB in the beginning and 216.3MB in the end (delta: -139.3MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. [2021-11-23 17:03:41,339 INFO L158 Benchmark]: Boogie Preprocessor took 405.11ms. Allocated memory is still 346.0MB. Free memory was 216.3MB in the beginning and 161.8MB in the end (delta: 54.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2021-11-23 17:03:41,340 INFO L158 Benchmark]: RCFGBuilder took 7680.09ms. Allocated memory was 346.0MB in the beginning and 1.1GB in the end (delta: 765.5MB). Free memory was 161.8MB in the beginning and 746.9MB in the end (delta: -585.1MB). Peak memory consumption was 211.2MB. Max. memory is 16.1GB. [2021-11-23 17:03:41,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 79.3MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4129.70ms. Allocated memory was 104.9MB in the beginning and 199.2MB in the end (delta: 94.4MB). Free memory was 67.9MB in the beginning and 77.0MB in the end (delta: -9.0MB). Peak memory consumption was 100.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 680.74ms. Allocated memory was 199.2MB in the beginning and 346.0MB in the end (delta: 146.8MB). Free memory was 77.0MB in the beginning and 216.3MB in the end (delta: -139.3MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 405.11ms. Allocated memory is still 346.0MB. Free memory was 216.3MB in the beginning and 161.8MB in the end (delta: 54.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * RCFGBuilder took 7680.09ms. Allocated memory was 346.0MB in the beginning and 1.1GB in the end (delta: 765.5MB). Free memory was 161.8MB in the beginning and 746.9MB in the end (delta: -585.1MB). Peak memory consumption was 211.2MB. 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 17:03:41,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem05_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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 8c719552bffa6ba6db840a4f702be318375a6b230876dbc0ec27371d8d8c7a55 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:03:43,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:03:43,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:03:43,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:03:43,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:03:43,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:03:43,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:03:43,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:03:43,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:03:43,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:03:43,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:03:43,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:03:43,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:03:43,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:03:43,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:03:43,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:03:43,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:03:43,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:03:43,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:03:43,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:03:43,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:03:43,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:03:43,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:03:43,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:03:44,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:03:44,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:03:44,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:03:44,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:03:44,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:03:44,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:03:44,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:03:44,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:03:44,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:03:44,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:03:44,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:03:44,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:03:44,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:03:44,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:03:44,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:03:44,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:03:44,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:03:44,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:03:44,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:03:44,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:03:44,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:03:44,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:03:44,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:03:44,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:03:44,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:03:44,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:03:44,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:03:44,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:03:44,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:03:44,097 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:03:44,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:03:44,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:03:44,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:03:44,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:03:44,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:03:44,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:03:44,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:03:44,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:03:44,101 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:03:44,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:03:44,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:03:44,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:03:44,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:03:44,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:03:44,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:03:44,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:03:44,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:03:44,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:44,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:03:44,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:03:44,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:03:44,105 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:03:44,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:44,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:03:44,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:03:44,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:03:44,106 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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c719552bffa6ba6db840a4f702be318375a6b230876dbc0ec27371d8d8c7a55 [2021-11-23 17:03:44,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:03:44,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:03:44,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:03:44,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:03:44,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:03:44,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem05_label05.c [2021-11-23 17:03:44,618 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/c557ecf05/88a890c116c44d658630e1d7a6851efb/FLAG76d971521 [2021-11-23 17:03:45,892 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:03:45,893 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/sv-benchmarks/c/eca-rers2012/Problem05_label05.c [2021-11-23 17:03:45,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/c557ecf05/88a890c116c44d658630e1d7a6851efb/FLAG76d971521 [2021-11-23 17:03:46,115 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/data/c557ecf05/88a890c116c44d658630e1d7a6851efb [2021-11-23 17:03:46,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:03:46,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:03:46,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:46,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:03:46,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:03:46,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:46" (1/1) ... [2021-11-23 17:03:46,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb8e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:46, skipping insertion in model container [2021-11-23 17:03:46,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:46" (1/1) ... [2021-11-23 17:03:46,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:03:46,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:03:48,653 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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/sv-benchmarks/c/eca-rers2012/Problem05_label05.c[381607,381620] [2021-11-23 17:03:48,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:48,697 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:03:50,218 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_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/sv-benchmarks/c/eca-rers2012/Problem05_label05.c[381607,381620] [2021-11-23 17:03:50,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:50,323 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:03:50,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50 WrapperNode [2021-11-23 17:03:50,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:50,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:50,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:03:50,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:03:50,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:50,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:50,967 INFO L137 Inliner]: procedures = 21, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 12337 [2021-11-23 17:03:50,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:50,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:03:50,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:03:50,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:03:50,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:50,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:03:51,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:03:51,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:03:51,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:03:51,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (1/1) ... [2021-11-23 17:03:51,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:51,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:03:51,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:03:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:03:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:03:51,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:03:51,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:03:51,911 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:03:51,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:04:03,489 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:04:03,548 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:04:03,548 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:04:03,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:04:03 BoogieIcfgContainer [2021-11-23 17:04:03,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:04:03,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:04:03,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:04:03,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:04:03,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:03:46" (1/3) ... [2021-11-23 17:04:03,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fceef14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:04:03, skipping insertion in model container [2021-11-23 17:04:03,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:50" (2/3) ... [2021-11-23 17:04:03,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fceef14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:04:03, skipping insertion in model container [2021-11-23 17:04:03,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:04:03" (3/3) ... [2021-11-23 17:04:03,565 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label05.c [2021-11-23 17:04:03,571 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:04:03,571 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:04:03,665 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:04:03,677 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 17:04:03,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:04:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 2185 states, 2183 states have (on average 1.8708199725148877) internal successors, (4084), 2184 states have internal predecessors, (4084), 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 17:04:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1688 [2021-11-23 17:04:03,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:03,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:03,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1507575471, now seen corresponding path program 1 times [2021-11-23 17:04:03,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:03,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508906435] [2021-11-23 17:04:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:03,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:03,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:04,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:04:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:04:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:01,592 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 17:06:01,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:06:01,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:01,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508906435] [2021-11-23 17:06:01,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508906435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:06:01,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:06:01,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-23 17:06:01,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890522617] [2021-11-23 17:06:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:06:01,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:06:01,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:06:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:06:01,644 INFO L87 Difference]: Start difference. First operand has 2185 states, 2183 states have (on average 1.8708199725148877) internal successors, (4084), 2184 states have internal predecessors, (4084), 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 16 states, 16 states have (on average 105.4375) internal successors, (1687), 15 states have internal predecessors, (1687), 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 17:06:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:28,950 INFO L93 Difference]: Finished difference Result 5997 states and 11421 transitions. [2021-11-23 17:06:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:06:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 105.4375) internal successors, (1687), 15 states have internal predecessors, (1687), 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 1687 [2021-11-23 17:06:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:29,008 INFO L225 Difference]: With dead ends: 5997 [2021-11-23 17:06:29,008 INFO L226 Difference]: Without dead ends: 3748 [2021-11-23 17:06:29,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1672 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:06:29,024 INFO L933 BasicCegarLoop]: 2392 mSDtfsCounter, 9090 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 28619 mSolverCounterSat, 1618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9090 SdHoareTripleChecker+Valid, 3776 SdHoareTripleChecker+Invalid, 30237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1618 IncrementalHoareTripleChecker+Valid, 28619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9090 Valid, 3776 Invalid, 30237 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1618 Valid, 28619 Invalid, 0 Unknown, 0 Unchecked, 25.9s Time] [2021-11-23 17:06:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-23 17:06:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3748. [2021-11-23 17:06:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 1.4915932746196958) internal successors, (5589), 3747 states have internal predecessors, (5589), 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 17:06:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 5589 transitions. [2021-11-23 17:06:29,195 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 5589 transitions. Word has length 1687 [2021-11-23 17:06:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:29,199 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 5589 transitions. [2021-11-23 17:06:29,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 105.4375) internal successors, (1687), 15 states have internal predecessors, (1687), 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 17:06:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 5589 transitions. [2021-11-23 17:06:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1797 [2021-11-23 17:06:29,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:29,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:29,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:06:29,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:29,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1723917345, now seen corresponding path program 1 times [2021-11-23 17:06:29,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:29,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129623125] [2021-11-23 17:06:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:29,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:29,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:29,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:06:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:06:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:08:19,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:19,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129623125] [2021-11-23 17:08:19,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129623125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:19,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:08:19,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-23 17:08:19,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950534812] [2021-11-23 17:08:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:19,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:08:19,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:08:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:08:19,670 INFO L87 Difference]: Start difference. First operand 3748 states and 5589 transitions. Second operand has 15 states, 15 states have (on average 119.73333333333333) internal successors, (1796), 15 states have internal predecessors, (1796), 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 17:09:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:09:01,070 INFO L93 Difference]: Finished difference Result 9160 states and 16109 transitions. [2021-11-23 17:09:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:09:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 119.73333333333333) internal successors, (1796), 15 states have internal predecessors, (1796), 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 1796 [2021-11-23 17:09:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:09:01,114 INFO L225 Difference]: With dead ends: 9160 [2021-11-23 17:09:01,114 INFO L226 Difference]: Without dead ends: 7040 [2021-11-23 17:09:01,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1817 GetRequests, 1785 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:09:01,120 INFO L933 BasicCegarLoop]: 3971 mSDtfsCounter, 9752 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 44053 mSolverCounterSat, 1513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9752 SdHoareTripleChecker+Valid, 5663 SdHoareTripleChecker+Invalid, 45566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1513 IncrementalHoareTripleChecker+Valid, 44053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:09:01,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9752 Valid, 5663 Invalid, 45566 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1513 Valid, 44053 Invalid, 0 Unknown, 0 Unchecked, 39.4s Time] [2021-11-23 17:09:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2021-11-23 17:09:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 5267. [2021-11-23 17:09:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5267 states, 5266 states have (on average 1.350740600075959) internal successors, (7113), 5266 states have internal predecessors, (7113), 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 17:09:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5267 states to 5267 states and 7113 transitions. [2021-11-23 17:09:01,267 INFO L78 Accepts]: Start accepts. Automaton has 5267 states and 7113 transitions. Word has length 1796 [2021-11-23 17:09:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:09:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 5267 states and 7113 transitions. [2021-11-23 17:09:01,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 119.73333333333333) internal successors, (1796), 15 states have internal predecessors, (1796), 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 17:09:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5267 states and 7113 transitions. [2021-11-23 17:09:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1833 [2021-11-23 17:09:01,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:09:01,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:09:01,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:09:01,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:09:01,532 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:09:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:09:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1761483464, now seen corresponding path program 1 times [2021-11-23 17:09:01,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:09:01,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066840888] [2021-11-23 17:09:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:01,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:09:01,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:09:01,561 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:09:01,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:09:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:02,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 17:09:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 17:12:37,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:37,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:37,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066840888] [2021-11-23 17:12:37,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066840888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:37,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:37,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-23 17:12:37,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667274184] [2021-11-23 17:12:37,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:37,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:12:37,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:12:37,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:12:37,403 INFO L87 Difference]: Start difference. First operand 5267 states and 7113 transitions. Second operand has 15 states, 15 states have (on average 119.86666666666666) internal successors, (1798), 15 states have internal predecessors, (1798), 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 17:13:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:35,537 INFO L93 Difference]: Finished difference Result 13588 states and 21737 transitions. [2021-11-23 17:13:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:13:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 119.86666666666666) internal successors, (1798), 15 states have internal predecessors, (1798), 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 1832 [2021-11-23 17:13:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:35,609 INFO L225 Difference]: With dead ends: 13588 [2021-11-23 17:13:35,610 INFO L226 Difference]: Without dead ends: 9949 [2021-11-23 17:13:35,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1845 GetRequests, 1819 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-11-23 17:13:35,619 INFO L933 BasicCegarLoop]: 2358 mSDtfsCounter, 19638 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 45658 mSolverCounterSat, 3057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19638 SdHoareTripleChecker+Valid, 4114 SdHoareTripleChecker+Invalid, 48715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3057 IncrementalHoareTripleChecker+Valid, 45658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:35,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19638 Valid, 4114 Invalid, 48715 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3057 Valid, 45658 Invalid, 0 Unknown, 0 Unchecked, 54.5s Time] [2021-11-23 17:13:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-11-23 17:13:35,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 9944. [2021-11-23 17:13:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 1.3271648395856381) internal successors, (13196), 9943 states have internal predecessors, (13196), 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 17:13:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 13196 transitions. [2021-11-23 17:13:35,952 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 13196 transitions. Word has length 1832 [2021-11-23 17:13:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:35,957 INFO L470 AbstractCegarLoop]: Abstraction has 9944 states and 13196 transitions. [2021-11-23 17:13:35,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 119.86666666666666) internal successors, (1798), 15 states have internal predecessors, (1798), 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 17:13:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 13196 transitions. [2021-11-23 17:13:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1899 [2021-11-23 17:13:36,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:36,018 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:36,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:13:36,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:36,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1887590941, now seen corresponding path program 1 times [2021-11-23 17:13:36,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:36,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925425427] [2021-11-23 17:13:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:36,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:36,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:36,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:36,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:13:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 2005 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:13:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:13:40,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:40,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:40,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925425427] [2021-11-23 17:13:40,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925425427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:40,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:40,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:13:40,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780112411] [2021-11-23 17:13:40,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:40,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:13:40,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:13:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:13:40,008 INFO L87 Difference]: Start difference. First operand 9944 states and 13196 transitions. Second operand has 3 states, 3 states have (on average 620.0) internal successors, (1860), 3 states have internal predecessors, (1860), 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 17:13:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:50,395 INFO L93 Difference]: Finished difference Result 19990 states and 27858 transitions. [2021-11-23 17:13:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:13:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 620.0) internal successors, (1860), 3 states have internal predecessors, (1860), 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 1898 [2021-11-23 17:13:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:50,445 INFO L225 Difference]: With dead ends: 19990 [2021-11-23 17:13:50,446 INFO L226 Difference]: Without dead ends: 11674 [2021-11-23 17:13:50,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1897 GetRequests, 1896 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:13:50,460 INFO L933 BasicCegarLoop]: 2000 mSDtfsCounter, 2157 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 4864 mSolverCounterSat, 1878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2157 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 6742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1878 IncrementalHoareTripleChecker+Valid, 4864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:50,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2157 Valid, 2195 Invalid, 6742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1878 Valid, 4864 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 17:13:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-11-23 17:13:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11673. [2021-11-23 17:13:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11673 states, 11672 states have (on average 1.235263879369431) internal successors, (14418), 11672 states have internal predecessors, (14418), 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 17:13:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 14418 transitions. [2021-11-23 17:13:50,721 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 14418 transitions. Word has length 1898 [2021-11-23 17:13:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 11673 states and 14418 transitions. [2021-11-23 17:13:50,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 620.0) internal successors, (1860), 3 states have internal predecessors, (1860), 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 17:13:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 14418 transitions. [2021-11-23 17:13:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2071 [2021-11-23 17:13:50,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:50,793 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:50,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:51,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:51,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 268334165, now seen corresponding path program 1 times [2021-11-23 17:13:51,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:51,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994020611] [2021-11-23 17:13:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:51,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:51,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:51,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:51,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:13:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:13:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-23 17:13:54,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:54,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:54,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994020611] [2021-11-23 17:13:54,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994020611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:54,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:54,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:13:54,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172019512] [2021-11-23 17:13:54,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:54,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:13:54,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:13:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:13:54,277 INFO L87 Difference]: Start difference. First operand 11673 states and 14418 transitions. Second operand has 3 states, 3 states have (on average 642.6666666666666) internal successors, (1928), 3 states have internal predecessors, (1928), 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 17:14:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:04,615 INFO L93 Difference]: Finished difference Result 26910 states and 34981 transitions. [2021-11-23 17:14:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:04,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 642.6666666666666) internal successors, (1928), 3 states have internal predecessors, (1928), 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 2070 [2021-11-23 17:14:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:04,660 INFO L225 Difference]: With dead ends: 26910 [2021-11-23 17:14:04,660 INFO L226 Difference]: Without dead ends: 16865 [2021-11-23 17:14:04,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2069 GetRequests, 2068 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:04,678 INFO L933 BasicCegarLoop]: 3313 mSDtfsCounter, 1890 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 5152 mSolverCounterSat, 2178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 3555 SdHoareTripleChecker+Invalid, 7330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2178 IncrementalHoareTripleChecker+Valid, 5152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:04,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 3555 Invalid, 7330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2178 Valid, 5152 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 17:14:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16865 states. [2021-11-23 17:14:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16865 to 16806. [2021-11-23 17:14:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 16805 states have (on average 1.222731329961321) internal successors, (20548), 16805 states have internal predecessors, (20548), 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 17:14:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 20548 transitions. [2021-11-23 17:14:05,003 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 20548 transitions. Word has length 2070 [2021-11-23 17:14:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 16806 states and 20548 transitions. [2021-11-23 17:14:05,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 642.6666666666666) internal successors, (1928), 3 states have internal predecessors, (1928), 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 17:14:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 20548 transitions. [2021-11-23 17:14:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2093 [2021-11-23 17:14:05,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:05,066 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:05,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:05,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:05,281 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -383391158, now seen corresponding path program 1 times [2021-11-23 17:14:05,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:05,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674935052] [2021-11-23 17:14:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:05,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:05,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:14:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:06,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 471 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-23 17:14:08,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:08,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674935052] [2021-11-23 17:14:08,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674935052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:08,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:08,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:08,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460613247] [2021-11-23 17:14:08,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:08,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:08,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:08,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:08,671 INFO L87 Difference]: Start difference. First operand 16806 states and 20548 transitions. Second operand has 3 states, 3 states have (on average 649.0) internal successors, (1947), 3 states have internal predecessors, (1947), 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 17:14:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:19,649 INFO L93 Difference]: Finished difference Result 42192 states and 53206 transitions. [2021-11-23 17:14:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 649.0) internal successors, (1947), 3 states have internal predecessors, (1947), 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 2092 [2021-11-23 17:14:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:19,719 INFO L225 Difference]: With dead ends: 42192 [2021-11-23 17:14:19,720 INFO L226 Difference]: Without dead ends: 27014 [2021-11-23 17:14:19,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2091 GetRequests, 2090 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:19,744 INFO L933 BasicCegarLoop]: 1846 mSDtfsCounter, 1916 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 5611 mSolverCounterSat, 1407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1916 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 7018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1407 IncrementalHoareTripleChecker+Valid, 5611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:19,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1916 Valid, 2147 Invalid, 7018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1407 Valid, 5611 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2021-11-23 17:14:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-11-23 17:14:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 27009. [2021-11-23 17:14:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27009 states, 27008 states have (on average 1.1857597748815165) internal successors, (32025), 27008 states have internal predecessors, (32025), 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 17:14:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27009 states to 27009 states and 32025 transitions. [2021-11-23 17:14:20,220 INFO L78 Accepts]: Start accepts. Automaton has 27009 states and 32025 transitions. Word has length 2092 [2021-11-23 17:14:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 27009 states and 32025 transitions. [2021-11-23 17:14:20,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 649.0) internal successors, (1947), 3 states have internal predecessors, (1947), 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 17:14:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 27009 states and 32025 transitions. [2021-11-23 17:14:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2104 [2021-11-23 17:14:20,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:20,314 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:20,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:20,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:20,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2071148787, now seen corresponding path program 1 times [2021-11-23 17:14:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512651336] [2021-11-23 17:14:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:20,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:20,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:20,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:14:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2214 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-23 17:14:24,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:24,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512651336] [2021-11-23 17:14:24,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512651336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:24,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:24,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:24,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473624751] [2021-11-23 17:14:24,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:24,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:24,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:24,156 INFO L87 Difference]: Start difference. First operand 27009 states and 32025 transitions. Second operand has 3 states, 3 states have (on average 653.6666666666666) internal successors, (1961), 3 states have internal predecessors, (1961), 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 17:14:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:35,336 INFO L93 Difference]: Finished difference Result 72772 states and 87614 transitions. [2021-11-23 17:14:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 653.6666666666666) internal successors, (1961), 3 states have internal predecessors, (1961), 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 2103 [2021-11-23 17:14:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:35,442 INFO L225 Difference]: With dead ends: 72772 [2021-11-23 17:14:35,443 INFO L226 Difference]: Without dead ends: 47391 [2021-11-23 17:14:35,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2102 GetRequests, 2101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:35,481 INFO L933 BasicCegarLoop]: 1718 mSDtfsCounter, 2534 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4483 mSolverCounterSat, 2360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2534 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2360 IncrementalHoareTripleChecker+Valid, 4483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:35,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2534 Valid, 1855 Invalid, 6843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2360 Valid, 4483 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 17:14:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47391 states. [2021-11-23 17:14:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47391 to 47388. [2021-11-23 17:14:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47388 states, 47387 states have (on average 1.154979213708401) internal successors, (54731), 47387 states have internal predecessors, (54731), 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 17:14:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47388 states to 47388 states and 54731 transitions. [2021-11-23 17:14:36,274 INFO L78 Accepts]: Start accepts. Automaton has 47388 states and 54731 transitions. Word has length 2103 [2021-11-23 17:14:36,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:36,275 INFO L470 AbstractCegarLoop]: Abstraction has 47388 states and 54731 transitions. [2021-11-23 17:14:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 653.6666666666666) internal successors, (1961), 3 states have internal predecessors, (1961), 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 17:14:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 47388 states and 54731 transitions. [2021-11-23 17:14:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2107 [2021-11-23 17:14:36,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:36,370 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:36,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 17:14:36,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:36,587 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:36,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1791631234, now seen corresponding path program 1 times [2021-11-23 17:14:36,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:36,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006162476] [2021-11-23 17:14:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:36,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:36,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:36,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:14:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:14:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:14:40,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:40,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006162476] [2021-11-23 17:14:40,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006162476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:40,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:40,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:40,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281398941] [2021-11-23 17:14:40,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:40,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:40,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:40,254 INFO L87 Difference]: Start difference. First operand 47388 states and 54731 transitions. Second operand has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 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 17:14:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:50,066 INFO L93 Difference]: Finished difference Result 99934 states and 115953 transitions. [2021-11-23 17:14:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:50,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 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 2106 [2021-11-23 17:14:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:50,170 INFO L225 Difference]: With dead ends: 99934 [2021-11-23 17:14:50,170 INFO L226 Difference]: Without dead ends: 54174 [2021-11-23 17:14:50,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2105 GetRequests, 2104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:50,205 INFO L933 BasicCegarLoop]: 3715 mSDtfsCounter, 1855 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 5174 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 4012 SdHoareTripleChecker+Invalid, 5985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 5174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:50,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 4012 Invalid, 5985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 5174 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 17:14:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54174 states. [2021-11-23 17:14:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54174 to 54174. [2021-11-23 17:14:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54174 states, 54173 states have (on average 1.143041736658483) internal successors, (61922), 54173 states have internal predecessors, (61922), 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 17:14:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54174 states to 54174 states and 61922 transitions. [2021-11-23 17:14:51,215 INFO L78 Accepts]: Start accepts. Automaton has 54174 states and 61922 transitions. Word has length 2106 [2021-11-23 17:14:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:51,216 INFO L470 AbstractCegarLoop]: Abstraction has 54174 states and 61922 transitions. [2021-11-23 17:14:51,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 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 17:14:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 54174 states and 61922 transitions. [2021-11-23 17:14:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2133 [2021-11-23 17:14:51,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:51,324 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:51,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:51,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:51,539 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash -599500657, now seen corresponding path program 1 times [2021-11-23 17:14:51,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:51,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193247484] [2021-11-23 17:14:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:51,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:51,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:51,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:51,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:14:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 2273 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:14:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 638 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:14:55,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:55,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193247484] [2021-11-23 17:14:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193247484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:55,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:55,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:55,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155753050] [2021-11-23 17:14:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:55,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:55,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:55,422 INFO L87 Difference]: Start difference. First operand 54174 states and 61922 transitions. Second operand has 3 states, 3 states have (on average 653.0) internal successors, (1959), 3 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:05,942 INFO L93 Difference]: Finished difference Result 125405 states and 142858 transitions. [2021-11-23 17:15:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 653.0) internal successors, (1959), 3 states have internal predecessors, (1959), 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 2132 [2021-11-23 17:15:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:06,048 INFO L225 Difference]: With dead ends: 125405 [2021-11-23 17:15:06,048 INFO L226 Difference]: Without dead ends: 72859 [2021-11-23 17:15:06,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2131 GetRequests, 2130 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:06,082 INFO L933 BasicCegarLoop]: 3918 mSDtfsCounter, 1683 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 5580 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 4144 SdHoareTripleChecker+Invalid, 6138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 5580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:06,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 4144 Invalid, 6138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 5580 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 17:15:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72859 states. [2021-11-23 17:15:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72859 to 72856. [2021-11-23 17:15:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72856 states, 72855 states have (on average 1.11171505044266) internal successors, (80994), 72855 states have internal predecessors, (80994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72856 states to 72856 states and 80994 transitions. [2021-11-23 17:15:07,549 INFO L78 Accepts]: Start accepts. Automaton has 72856 states and 80994 transitions. Word has length 2132 [2021-11-23 17:15:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:07,550 INFO L470 AbstractCegarLoop]: Abstraction has 72856 states and 80994 transitions. [2021-11-23 17:15:07,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 653.0) internal successors, (1959), 3 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 72856 states and 80994 transitions. [2021-11-23 17:15:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2142 [2021-11-23 17:15:07,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:07,821 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:07,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:08,039 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash 532289829, now seen corresponding path program 1 times [2021-11-23 17:15:08,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:08,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081434634] [2021-11-23 17:15:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:08,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:08,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:08,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b5cc166-8a0e-4620-95e8-4731f91bcc0e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:15:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 636 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-23 17:15:11,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:11,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:11,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081434634] [2021-11-23 17:15:11,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081434634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:11,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:11,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:11,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207808504] [2021-11-23 17:15:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:11,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:11,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:11,978 INFO L87 Difference]: Start difference. First operand 72856 states and 80994 transitions. Second operand has 3 states, 3 states have (on average 691.6666666666666) internal successors, (2075), 3 states have internal predecessors, (2075), 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)