./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label11.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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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 ce9ec331bbd0957d91f023d2cde751d43aea048fc58a1bf2a8faaac825bae047 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:16,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:16,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:16,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:16,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:16,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:16,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:16,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:16,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:16,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:16,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:16,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:16,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:16,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:16,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:16,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:16,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:16,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:16,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:16,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:16,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:16,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:16,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:16,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:16,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:16,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:16,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:16,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:16,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:16,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:16,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:16,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:16,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:16,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:16,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:16,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:16,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:16,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:16,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:16,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:16,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:16,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:17:16,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:16,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:16,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:16,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:16,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:16,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:16,497 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:16,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:16,498 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:16,498 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:17:16,499 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:16,499 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:16,499 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:17:16,499 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:17:16,500 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:16,500 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:17:16,500 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:17:16,500 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:17:16,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:16,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:16,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:17:16,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:16,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:16,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:16,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:16,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:16,504 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:16,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:16,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:16,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:16,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:16,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:16,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:16,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:16,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:16,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:16,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:17:16,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:17:16,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:16,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:16,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:16,507 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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce9ec331bbd0957d91f023d2cde751d43aea048fc58a1bf2a8faaac825bae047 [2021-11-23 17:17:16,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:16,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:16,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:16,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:16,838 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:16,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem19_label11.c [2021-11-23 17:17:16,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/6e816aa5d/74245359247844dabe205c4870d6c9f6/FLAGd47383dc2 [2021-11-23 17:17:17,915 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:17,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/sv-benchmarks/c/eca-rers2012/Problem19_label11.c [2021-11-23 17:17:17,968 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/6e816aa5d/74245359247844dabe205c4870d6c9f6/FLAGd47383dc2 [2021-11-23 17:17:18,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/6e816aa5d/74245359247844dabe205c4870d6c9f6 [2021-11-23 17:17:18,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:18,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:18,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:18,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:18,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:18,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:18" (1/1) ... [2021-11-23 17:17:18,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfde32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:18, skipping insertion in model container [2021-11-23 17:17:18,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:18" (1/1) ... [2021-11-23 17:17:18,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:18,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:18,822 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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/sv-benchmarks/c/eca-rers2012/Problem19_label11.c[2490,2503] [2021-11-23 17:17:20,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:20,517 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:20,549 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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/sv-benchmarks/c/eca-rers2012/Problem19_label11.c[2490,2503] [2021-11-23 17:17:21,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:21,676 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:21,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21 WrapperNode [2021-11-23 17:17:21,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:21,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:21,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:21,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:21,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:21,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:22,794 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-11-23 17:17:22,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:22,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:22,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:22,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:22,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:22,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:23,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:23,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:23,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:23,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:21" (1/1) ... [2021-11-23 17:17:23,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:23,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:23,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:23,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:17:23,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:23,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:23,998 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:23,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:17:33,278 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:17:33,387 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 17:17:33,393 INFO L158 Benchmark]: Toolchain (without parser) took 15104.19ms. Allocated memory was 102.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 65.2MB in the beginning and 1.9GB in the end (delta: -1.9GB). Peak memory consumption was 465.4MB. Max. memory is 16.1GB. [2021-11-23 17:17:33,393 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 81.8MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:17:33,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3388.01ms. Allocated memory was 102.8MB in the beginning and 257.9MB in the end (delta: 155.2MB). Free memory was 65.2MB in the beginning and 128.4MB in the end (delta: -63.2MB). Peak memory consumption was 92.9MB. Max. memory is 16.1GB. [2021-11-23 17:17:33,397 INFO L158 Benchmark]: Boogie Procedure Inliner took 1116.37ms. Allocated memory was 257.9MB in the beginning and 515.9MB in the end (delta: 257.9MB). Free memory was 127.3MB in the beginning and 326.4MB in the end (delta: -199.1MB). Peak memory consumption was 93.5MB. Max. memory is 16.1GB. [2021-11-23 17:17:33,398 INFO L158 Benchmark]: Boogie Preprocessor took 1000.16ms. Allocated memory is still 515.9MB. Free memory was 326.4MB in the beginning and 279.2MB in the end (delta: 47.2MB). Peak memory consumption was 90.2MB. Max. memory is 16.1GB. [2021-11-23 17:17:33,399 INFO L158 Benchmark]: RCFGBuilder took 9593.35ms. Allocated memory was 515.9MB in the beginning and 2.3GB in the end (delta: 1.8GB). Free memory was 279.2MB in the beginning and 1.9GB in the end (delta: -1.6GB). Peak memory consumption was 268.6MB. Max. memory is 16.1GB. [2021-11-23 17:17:33,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 81.8MB. Free memory is still 45.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3388.01ms. Allocated memory was 102.8MB in the beginning and 257.9MB in the end (delta: 155.2MB). Free memory was 65.2MB in the beginning and 128.4MB in the end (delta: -63.2MB). Peak memory consumption was 92.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 1116.37ms. Allocated memory was 257.9MB in the beginning and 515.9MB in the end (delta: 257.9MB). Free memory was 127.3MB in the beginning and 326.4MB in the end (delta: -199.1MB). Peak memory consumption was 93.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 1000.16ms. Allocated memory is still 515.9MB. Free memory was 326.4MB in the beginning and 279.2MB in the end (delta: 47.2MB). Peak memory consumption was 90.2MB. Max. memory is 16.1GB. * RCFGBuilder took 9593.35ms. Allocated memory was 515.9MB in the beginning and 2.3GB in the end (delta: 1.8GB). Free memory was 279.2MB in the beginning and 1.9GB in the end (delta: -1.6GB). Peak memory consumption was 268.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:17:33,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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 ce9ec331bbd0957d91f023d2cde751d43aea048fc58a1bf2a8faaac825bae047 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:35,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:35,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:36,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:36,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:36,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:36,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:36,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:36,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:36,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:36,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:36,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:36,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:36,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:36,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:36,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:36,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:36,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:36,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:36,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:36,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:36,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:36,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:36,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:36,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:36,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:36,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:36,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:36,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:36,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:36,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:36,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:36,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:36,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:36,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:36,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:36,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:36,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:36,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:36,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:36,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:36,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:17:36,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:36,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:36,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:36,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:36,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:36,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:36,154 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:36,154 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:36,154 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:36,155 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:36,156 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:36,156 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:36,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:36,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:36,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:36,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:36,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:36,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:36,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:36,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:17:36,159 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:17:36,159 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:17:36,159 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:36,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:36,159 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:36,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:36,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:36,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:17:36,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:36,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:36,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:36,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:36,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:36,162 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:17:36,162 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:36,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:36,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:36,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:36,163 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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce9ec331bbd0957d91f023d2cde751d43aea048fc58a1bf2a8faaac825bae047 [2021-11-23 17:17:36,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:36,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:36,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:36,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:36,583 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:36,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem19_label11.c [2021-11-23 17:17:36,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/02fa57996/3282aad3e4c04bddb22a063b273b73e5/FLAG8cb624cd4 [2021-11-23 17:17:37,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:37,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/sv-benchmarks/c/eca-rers2012/Problem19_label11.c [2021-11-23 17:17:37,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/02fa57996/3282aad3e4c04bddb22a063b273b73e5/FLAG8cb624cd4 [2021-11-23 17:17:38,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/data/02fa57996/3282aad3e4c04bddb22a063b273b73e5 [2021-11-23 17:17:38,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:38,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:38,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:38,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:38,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:38,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:38" (1/1) ... [2021-11-23 17:17:38,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9ffce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:38, skipping insertion in model container [2021-11-23 17:17:38,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:38" (1/1) ... [2021-11-23 17:17:38,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:38,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:38,673 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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/sv-benchmarks/c/eca-rers2012/Problem19_label11.c[2490,2503] [2021-11-23 17:17:40,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:40,873 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:40,909 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_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/sv-benchmarks/c/eca-rers2012/Problem19_label11.c[2490,2503] [2021-11-23 17:17:42,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:42,190 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:42,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42 WrapperNode [2021-11-23 17:17:42,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:42,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:42,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:42,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:42,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,749 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9418 [2021-11-23 17:17:42,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:42,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:42,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:42,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:42,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:42,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:43,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:43,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:43,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:43,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (1/1) ... [2021-11-23 17:17:43,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:43,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:43,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:43,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:17:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:43,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:43,649 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:43,651 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:18:53,275 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:18:53,311 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:18:53,311 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:18:53,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:18:53 BoogieIcfgContainer [2021-11-23 17:18:53,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:18:53,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:18:53,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:18:53,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:18:53,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:17:38" (1/3) ... [2021-11-23 17:18:53,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15604c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:18:53, skipping insertion in model container [2021-11-23 17:18:53,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:42" (2/3) ... [2021-11-23 17:18:53,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15604c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:18:53, skipping insertion in model container [2021-11-23 17:18:53,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:18:53" (3/3) ... [2021-11-23 17:18:53,324 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label11.c [2021-11-23 17:18:53,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:18:53,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:18:53,400 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:18:53,409 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 17:18:53,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:18:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 17:18:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:18:53,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:53,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:53,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2021-11-23 17:18:53,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:53,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673923834] [2021-11-23 17:18:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:53,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:53,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:53,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:18:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:18:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:53,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:53,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:53,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673923834] [2021-11-23 17:18:53,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673923834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:53,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:18:53,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:18:53,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810644824] [2021-11-23 17:18:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:53,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:18:53,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:18:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:18:53,940 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:24,593 INFO L93 Difference]: Finished difference Result 4912 states and 9308 transitions. [2021-11-23 17:20:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:20:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:24,641 INFO L225 Difference]: With dead ends: 4912 [2021-11-23 17:20:24,641 INFO L226 Difference]: Without dead ends: 3100 [2021-11-23 17:20:24,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 17:20:24,657 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1467 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 1199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 5704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1199 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:24,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 1746 Invalid, 5704 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1199 Valid, 4505 Invalid, 0 Unknown, 0 Unchecked, 90.2s Time] [2021-11-23 17:20:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-11-23 17:20:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 3098. [2021-11-23 17:20:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3097 states have (on average 1.5715208266063934) internal successors, (4867), 3097 states have internal predecessors, (4867), 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 17:20:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 4867 transitions. [2021-11-23 17:20:24,862 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 4867 transitions. Word has length 16 [2021-11-23 17:20:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:24,863 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 4867 transitions. [2021-11-23 17:20:24,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 4867 transitions. [2021-11-23 17:20:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 17:20:24,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:24,868 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:20:24,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:25,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:25,079 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash -686715670, now seen corresponding path program 1 times [2021-11-23 17:20:25,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:25,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198662296] [2021-11-23 17:20:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:25,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:25,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:25,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:25,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:20:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:20:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:25,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:25,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:25,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198662296] [2021-11-23 17:20:25,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198662296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:25,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:20:25,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:20:25,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015960764] [2021-11-23 17:20:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:25,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:25,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:20:25,596 INFO L87 Difference]: Start difference. First operand 3098 states and 4867 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:17,475 INFO L93 Difference]: Finished difference Result 9074 states and 14292 transitions. [2021-11-23 17:22:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-23 17:22:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:17,521 INFO L225 Difference]: With dead ends: 9074 [2021-11-23 17:22:17,522 INFO L226 Difference]: Without dead ends: 5978 [2021-11-23 17:22:17,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 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 17:22:17,529 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 2516 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 5282 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:17,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2516 Valid, 989 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5282 Invalid, 0 Unknown, 0 Unchecked, 111.6s Time] [2021-11-23 17:22:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2021-11-23 17:22:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 5975. [2021-11-23 17:22:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 1.5219283562102444) internal successors, (9092), 5974 states have internal predecessors, (9092), 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 17:22:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 9092 transitions. [2021-11-23 17:22:17,705 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 9092 transitions. Word has length 85 [2021-11-23 17:22:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:17,706 INFO L470 AbstractCegarLoop]: Abstraction has 5975 states and 9092 transitions. [2021-11-23 17:22:17,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 9092 transitions. [2021-11-23 17:22:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 17:22:17,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:17,833 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:22:17,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:18,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:18,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash -558246819, now seen corresponding path program 1 times [2021-11-23 17:22:18,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969371240] [2021-11-23 17:22:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:18,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:18,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:18,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:22:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:22:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:18,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:22:18,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:18,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969371240] [2021-11-23 17:22:18,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969371240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:22:18,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:22:18,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:22:18,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168735162] [2021-11-23 17:22:18,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:18,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:18,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:22:18,619 INFO L87 Difference]: Start difference. First operand 5975 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 17:23:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:54,450 INFO L93 Difference]: Finished difference Result 14708 states and 22258 transitions. [2021-11-23 17:23:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:23:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 107 [2021-11-23 17:23:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:54,500 INFO L225 Difference]: With dead ends: 14708 [2021-11-23 17:23:54,500 INFO L226 Difference]: Without dead ends: 8735 [2021-11-23 17:23:54,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 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 17:23:54,509 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1448 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 4769 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 5492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 4769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:54,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 1924 Invalid, 5492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 4769 Invalid, 0 Unknown, 0 Unchecked, 95.5s Time] [2021-11-23 17:23:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-11-23 17:23:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 8719. [2021-11-23 17:23:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 1.404909382885983) internal successors, (12248), 8718 states have internal predecessors, (12248), 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 17:23:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 12248 transitions. [2021-11-23 17:23:54,707 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 12248 transitions. Word has length 107 [2021-11-23 17:23:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:54,708 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 12248 transitions. [2021-11-23 17:23:54,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 17:23:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 12248 transitions. [2021-11-23 17:23:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 17:23:54,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:54,711 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:23:54,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:23:54,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:54,922 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash -103888114, now seen corresponding path program 1 times [2021-11-23 17:23:54,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:54,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840706843] [2021-11-23 17:23:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:54,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:54,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:54,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:23:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:23:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:55,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:23:55,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:55,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840706843] [2021-11-23 17:23:55,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840706843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:23:55,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:23:55,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:23:55,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807703848] [2021-11-23 17:23:55,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:23:55,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:23:55,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:23:55,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:23:55,592 INFO L87 Difference]: Start difference. First operand 8719 states and 12248 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 17:25:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:25,931 INFO L93 Difference]: Finished difference Result 22907 states and 31675 transitions. [2021-11-23 17:25:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 113 [2021-11-23 17:25:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:26,002 INFO L225 Difference]: With dead ends: 22907 [2021-11-23 17:25:26,002 INFO L226 Difference]: Without dead ends: 14190 [2021-11-23 17:25:26,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 17:25:26,014 INFO L933 BasicCegarLoop]: 1645 mSDtfsCounter, 1375 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 5272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:26,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 1919 Invalid, 5272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 4352 Invalid, 0 Unknown, 0 Unchecked, 90.1s Time] [2021-11-23 17:25:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14190 states. [2021-11-23 17:25:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14190 to 14186. [2021-11-23 17:25:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14186 states, 14185 states have (on average 1.2659146986253085) internal successors, (17957), 14185 states have internal predecessors, (17957), 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 17:25:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14186 states to 14186 states and 17957 transitions. [2021-11-23 17:25:26,337 INFO L78 Accepts]: Start accepts. Automaton has 14186 states and 17957 transitions. Word has length 113 [2021-11-23 17:25:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:26,338 INFO L470 AbstractCegarLoop]: Abstraction has 14186 states and 17957 transitions. [2021-11-23 17:25:26,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 17:25:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 14186 states and 17957 transitions. [2021-11-23 17:25:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-23 17:25:26,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:26,341 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:25:26,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:26,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:26,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 996430065, now seen corresponding path program 1 times [2021-11-23 17:25:26,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:26,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220870556] [2021-11-23 17:25:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:26,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:26,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:25:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:28,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:28,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:28,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220870556] [2021-11-23 17:25:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220870556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:28,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:28,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:28,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797560516] [2021-11-23 17:25:28,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:28,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:28,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:28,885 INFO L87 Difference]: Start difference. First operand 14186 states and 17957 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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 17:26:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:52,922 INFO L93 Difference]: Finished difference Result 35208 states and 43485 transitions. [2021-11-23 17:26:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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 223 [2021-11-23 17:26:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:52,967 INFO L225 Difference]: With dead ends: 35208 [2021-11-23 17:26:52,967 INFO L226 Difference]: Without dead ends: 21024 [2021-11-23 17:26:52,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 221 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 17:26:52,982 INFO L933 BasicCegarLoop]: 1790 mSDtfsCounter, 1177 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 4526 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:52,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 1960 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4526 Invalid, 0 Unknown, 0 Unchecked, 83.7s Time] [2021-11-23 17:26:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21024 states. [2021-11-23 17:26:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21024 to 21018. [2021-11-23 17:26:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21018 states, 21017 states have (on average 1.1923205024503973) internal successors, (25059), 21017 states have internal predecessors, (25059), 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 17:26:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21018 states to 21018 states and 25059 transitions. [2021-11-23 17:26:53,362 INFO L78 Accepts]: Start accepts. Automaton has 21018 states and 25059 transitions. Word has length 223 [2021-11-23 17:26:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:53,363 INFO L470 AbstractCegarLoop]: Abstraction has 21018 states and 25059 transitions. [2021-11-23 17:26:53,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 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 17:26:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 21018 states and 25059 transitions. [2021-11-23 17:26:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-23 17:26:53,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:53,375 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:26:53,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:53,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:53,587 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:53,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1258998014, now seen corresponding path program 1 times [2021-11-23 17:26:53,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:53,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077939569] [2021-11-23 17:26:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:53,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:53,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:53,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:26:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:58,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:58,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:58,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077939569] [2021-11-23 17:26:58,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077939569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:58,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:58,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165772475] [2021-11-23 17:26:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:26:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:26:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:26:58,452 INFO L87 Difference]: Start difference. First operand 21018 states and 25059 transitions. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 3 states have internal predecessors, (411), 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 17:28:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:20,472 INFO L93 Difference]: Finished difference Result 35227 states and 42825 transitions. [2021-11-23 17:28:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:28:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 3 states have internal predecessors, (411), 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 411 [2021-11-23 17:28:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:20,506 INFO L225 Difference]: With dead ends: 35227 [2021-11-23 17:28:20,506 INFO L226 Difference]: Without dead ends: 15545 [2021-11-23 17:28:20,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:28:20,523 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 1141 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 7351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:20,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2116 Invalid, 7351 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 7343 Invalid, 0 Unknown, 0 Unchecked, 81.7s Time] [2021-11-23 17:28:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15545 states. [2021-11-23 17:28:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15545 to 15544. [2021-11-23 17:28:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15544 states, 15543 states have (on average 1.2284629736859036) internal successors, (19094), 15543 states have internal predecessors, (19094), 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 17:28:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15544 states to 15544 states and 19094 transitions. [2021-11-23 17:28:20,769 INFO L78 Accepts]: Start accepts. Automaton has 15544 states and 19094 transitions. Word has length 411 [2021-11-23 17:28:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 15544 states and 19094 transitions. [2021-11-23 17:28:20,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 3 states have internal predecessors, (411), 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 17:28:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 15544 states and 19094 transitions. [2021-11-23 17:28:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2021-11-23 17:28:20,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:20,792 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:28:20,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:21,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:21,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1464021320, now seen corresponding path program 1 times [2021-11-23 17:28:21,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:21,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023213546] [2021-11-23 17:28:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:21,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:21,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:21,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf27c7c6-97f3-4176-83b7-fb63e4108cc8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:28:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:28:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 27 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:24,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023213546] [2021-11-23 17:28:24,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023213546] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:28:24,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:28:24,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:28:24,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176895826] [2021-11-23 17:28:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:24,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:28:24,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:28:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:28:24,581 INFO L87 Difference]: Start difference. First operand 15544 states and 19094 transitions. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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 17:28:31,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:28:34,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:28,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:29,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:29:56,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:03,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:30:53,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []